Turbo Squeal At Idle

Please note you may have to register before you can post: click the register link above to proceed. Some older cars use a carburetor to process fuel, rather than a fuel injection system. Whipple Superchargers is owned and operated by its founder Art Whipple and is located in Fresno, CA. Engine noise can be hard to identify and even harder to isolate. Since we got back from the road trip Ive noticed a low noise coming from the engine, it sounds sort of like knocking, but not a loud knock. Shut down and give your engine it's first oil and filter change. I have an 05 MR and it makes similar noises (not as drastic). We treat our customers like family before and after every sale. The car has 172k so it may be time for it’s second clutch (though I haven’t experienced any performance issues yet) but the noise doesn’t change if the clutch pedal is depressed or not. It was only designed to operate to a yellow line of 20psi, and a redline of 25psi per the garrett engineers. • Starting the car at night using push-to-start (Sensor automatically turns on headlights + lower LEDs): Squealing Alternator • When the car is running, and the alternator is squealing, manually turning off all the headlights makes the squeal completely go away. The fast idle valve is an open/close solenoid vacuum control valve to admit more air to the intake manifold when cold. LYCOMING OPERATOR'S MANUAL SECTION 6 O-360 AND ASSOCIATED MODELS TROUBLE-SHOOTING SECTION 6 TROUBLE-SHOOTING Experience has proven that the best method of trouble-shooting is to decide on the various causes of a. Is the noise grinding like metal on metal?. If your engine has an inner cooler, then the noise will be intensified. If a turbo is failing, it may produce a noise when the boost is running. does it blow white at idle as well?? inside and your turbo makes a noticable not normal noise and your exhaust is. There have been a lot of complaints on this and people told it's normal. 0 Diesel Squeal fireman7753. What is this whistling/squealing noise? Seems to only start after approx 5 minutes running (ie: when warmed up). First, after driving it any distance it seems to idle rougher than my previous Rogue. Without variable valve timing or variable valve lift, the valve timing is the same for all engine speeds and conditions, therefore compromises are necessary. Last night it started making like a high pitch squeal when it sits idling? Any idea what that could be and how much it might cost to fix it? Any help would be greatly appreciated!. Tank you in advance. It's a very noticeable and annoying noise, and I can't pinpoint it. The engine ticking noise off idle, sluggish performance from low rpm, and loss of MPG is definitely a change and not at all what it was. The Chevy Cruze is a compact car that has been manufactured since 2008. You may have to register before you can post: click the register link above to proceed. While the car is certainly way too much fun to be legal, it's not without its problems. A turbocharger will make good and bad noises but with regards to the bad noise, it is best described as a police siren. i drove less than half. And the car is really slow. When should you be concerned? All turbochargers make some amount of noise - and most people don't even. Re: Ticking noise on idle 2015 2LT These cars fuel systems have a low pressure side-- the tank- which has fuel pump 1- that pumps gas from the tank to the engine- and at the engine- the high side--- The high side starts at the high pressure pump which is located at the rear of the cylinder head. None of the dealers had an answer for it. Installed and started the truck, It idled fine but once I increased the RPMs it started to have a loud squeal comming from the turbos. The Nissan Skyline is legendary, thanks to far too many appearances in video games, movies, and manga. As more engine power is applied the louder the noise will become. Join the thousands of Powerstroke, Duramax, and Cummins diesel truck owners. If you own, or know someone who owns a MINI Cooper S (R56) car, from 2006. Sometimes the noise can be frighteningly loud and sound ominous--only to be engine belt noise. 8T ticking noise 1 Answer. You will destroy the thrust bearing using boost foolers and over boosting the turbo. Screw Type Supercharging Screw type superchargers are derived from the Roots type concept but with vast improvements for street use. Annoying noise at idle in D and R is this normal? My brand new 2013 veloster turbo is making annoying noise at idle in D and R. a noise concern. The noise goes away when I rev past 1300-1500 rpm. An easy way to find one of these faulty PCV valves is to pinch off the supply line to the PCV valve with a pair of pliers while the engine is at idle. 1,800-2000rpm. Truck has a *** and EGR *****. If I tap the gas pedal the high pitched sound goes away for a second, then comes back. I have a pick-up Chevrolet K1500 6. See the most common turbo problems and what is most likely to be wrong. However, with as complicated as these computers are, they don't catch everything, everytime. Diagnostic guide to what might be wrong with your Alfa 147, 156 or GT. If that stops the noise just secure the pipe in position with a tie wrap or similar. Diesel Ops is committed to providing our customers an unparalleled shopping experience. Fuel-Efficient Turbocharger. Turbocharger's operate as an exhaust driven method of increasing Intake air flow. L EVC catback exhaust). Are you experiencing whining noise when accelerating your car to high RPM speeds? This seems to be a common problem with many cars. Turbo Surging at Idle with Exhaust Brake IGOTACUMMINS is an online forum and community for all Cummins Turbo Diesel enthusiasts. I'm thinking I must have a leaking. The strainer was blocked by some bad oil left overs. To learn more, see reviews. Started at about 1200 miles. If you have the air/fuel ratio set properly and your engine can idle somewhat decently, even if it's by holding the throttle pedal down off closed-throttle to keep the engine from stalling, you can begin by setting a ball-park ignition advance value. Instead of using a stepper motor based Idle Air Control valve, your MegaSquirt-II™ controller can be configured for a 'Fast Idle Valve'. You may recall that Full Race was responsible for the turbo manifold on the Papadakis Racing 1000+ horsepower Supra B58 build. I had Squeaking when i turned off the car for like 3 or 4 seconds. Cold idle engine chatter T1N Talk. no reason why the replcement turbo. 0-litre turbo'd flat-four in the Boxster, and a 2. When I had my oil changed tonight at a Tires Plus, I asked them to listen, and the mechanic thought it was a valve related issue since it’s not a constant noise. Not during acceleration/coasting at all. There are two main contributors to the answer. It sounds like you have air in your power steering system. There is a strange clicking noise coming from the engine at idle, when I rev the car this clicking noise goes faster. Use adapter CH-50378 (required to accurately test return, contains regulator to maintain injector return pressure) to route the injector return into a graduated container. If I turn key off then back on while driving, boom something resets turbo comes alive. The car has a random vibration noise at idle only. Is the noise grinding like metal on metal?. • Noisy water pump bearing (rattle or growl). It goes away when revving. everything is fine until i go from 9th to 10th and try to build up the rpm or i start to climb a grade, as soon as i shift down its ok. If I bounce on the running boards on idle I can get it to go away sometimes. I had a whistling from my engine bay and rough idle/stuttering under acceleration. 6 XJ-S (1983-87) we can supply the air filter assembly with a single 3" diameter bell-mouth. no reason why the replcement turbo. The turbo-to-exhaust manifold gasket is VERY common to make this terrifying noise. Duramax Problems Common Problems with the 6. Took it to the local Bremerton VW dealer. 0L turbo is having the same issue with the squealing noise when first starting the car at low idle and the A/C running. Will having the best one in the market make up for that?. Odd noise from the engine at idle? have to try stopping by a dealer up here in case they can find out something or at least see if it happens with any turbo dart. Which means excessive shaft play of some sort. The solution is to fit a new blower motor resistor and wiring loom. i drove less than half. The noise is much worse at idle and should come and go (or at least change sounds) when pushing the pedal. Checked this morning at 40*F upon startupno noise. Someone suggesting a rocker arm. I'm new to the forum looking at a 08 turbo with less than 60k miles. He put on new brakes and changed all the belts. 4 liter engine vacume leak and high pitched squeal and the fix. Engine has a dead miss. Started at about 1200 miles. This is a component of a regular maintenance schedule for almost all vehicles. Any answers will be greatly appreciated. The first turbo has a very low reading (6-7 lbs) and the second turbo has a higher reading. Reply I took it to Porsche today and they told me it was " Engine Noise Traced to cracked Liner on Cylinders 5/6 Will require a strip to determine fault. First, after driving it any distance it seems to idle rougher than my previous Rogue. 4 Tsi, i drove the car the other day and noticed every now and then it would making a strange rough sound on idle but as soon as the clutch is engaged the noise goes. So we take it to Nissan and they tell us the turbo is dead and it is going to cost $2547. problem with engine. The videos do sadly sound normal for injection (BMW had a SIB for cover the injection pump on very early N20s because of the noise) and mostly waste gate. If it's too hot there is a chance you can damage the hoses. My understanding is that most DFI engines make a bit of a ticking noise, some worse than others, but I just wondered if I should be at all concerned? Cheers Ben _____ 997. 42 thoughts on " What Causes a Turbo To Blow, Leak, or Burn Oil? Find Out HERE! " Dr. Hey everyone, New member here, recently purchased a '16 colorado with the duramax, Z71 package. The Pilot Injection System produces fuel injection in advance before the main injection starts working, reducing Ignition Lag Time and resulting in continuous and complete combustion. I loaded up to haul my rig to Carnage Canyon that same day. The Pilot Injection System produces fuel injection in advance before the main injection starts working, reducing Ignition Lag Time and resulting in continuous and complete combustion. In the forum you will find an informative tech area, a place for Member's journals, Vendors with special Members pricing, and more!. Here's the first of a few posts detailing changes for the 2013 models, this time focussing on the drivetrain updates. Broadcast Message 7055, SSM 19707. Consider these noises as a polite warning from the belts and/or pulleys. Whoooooouuuuum. If the car idles rough this can also be indicative of bad plug wires, distributor, or rotor. this way the oil dos’t get cooked. A resonator is equipped with an air connector hose to reduce the intake air noise. I have a scanner, data logger, and Forscan to monitor all the PIDs and i see nothing abnormal. There have been a lot of complaints on this and people told it's normal. let off the gas and the howling stops and seems to be OK. How to Tell If Your Duramax Diesel Turbo Is Gone? by Richard Rowe Introduced in 2001 as a joint venture between GM and Isuzu, the Duramax V-8 was the General's bid to one-up Ford and Chrysler's newest generation of powerful and efficient diesels. If I tap the gas pedal the high pitched sound goes away for a second, then comes back. everything is fine until i go from 9th to 10th and try to build up the rpm or i start to climb a grade, as soon as i shift down its ok. I also followed this advice. I've had the same noise sitting at idle on both my ST's. As long as you have at least 15lbs of oil pressure at idle and 50-60 at 3,000 rpm, you will be fine. they needed mine because it's a '03 turbo and didn't have any in stock to exchange. I Found Out How To Make My Turbo Whistle Louder! I just want turbo noise. Turn the air conditioning on and allow the engine to idle for at least one minute. That could be causing the misfires. 2 Affected Products Vehicle MAKE MODEL YEAR CHEVROLET CRUZE 2011-2012 Parts. The service consultanat at the Volvo dealer said that this high-pitched sound is due to the turbo or turbine engine - wear and tear is the given reason. I'm not sure about everyone else but I get this kind of noise when the engine rpm is decelerating between about 1. A discussion and braggng rights to Good Nights At the track. Also, I'm from southern Ontario and the temperatures here right now are around -10 C (14 F) to +5 C (41F). Help! Squeaking noise comming from engine! V6 Tech. Engine rattling noise at idle Hey everyone, Got my car back roughly 3 1/2 weeks ago, and most everything is running well. Hello, welcome to ASUS Republic of Gamers Official Forum. The noise gets worse in the cold. vid1 2014 chevy cruze 1. Since we got back from the road trip Ive noticed a low noise coming from the engine, it sounds sort of like knocking, but not a loud knock. Broken springs were noted laying on undercover. [Query:] My car is running perfectly but whenever the fuel-gauge drops to around 25%, noises coming out unexpectedly, but after refuelling the noise will suddenly disappear. I loaded up to haul my rig to Carnage Canyon that same day. Operating principle. Top 10 Causes of a Rough Idle | JL Motorworks. White smoke in cold ambients is normal. If I apply another 100-200rpm it disappears. When these go bad then will setup a rattle at idle and low rpms that is close to an injector rattle in sound. This accelerates the engine wear considerably! When shutting down, run at reduced rpm [just above low idle] for 5 min, then shut down. WILLIAMS October 31, 2015 at 3:58 am. I'm not sure about everyone else but I get this kind of noise when the engine rpm is decelerating between about 1. Updated on January 26, 2019. Turned off air conditioning; smoke and whining seemed to stop, and I was able to drive it the 15 miles to my mechanic. NET simply provides the Forum for information sharing on Nissan Zs and other automotive issues. Couldn't you - dear Lenovo - just prepare BIOS update to make the fan active only when it's needed?? Waiting for BIOS fix for 320-IKB. A loud whining noise - Often, a failing turbocharger will make a loud, distinctive noise when under boost - a bit like a dentist's drill or police siren if compressor wheel damaged. Normal about 900. One common cause for turbo replacement is noise. get back to me. Squealing sound at the front of a car. This will involve a motor and usually a post motor filter replacement as it usually burns the post filter or at best traps that lovely smell in the filter for eternity. my A4 engine suddenly devenloped a rough idel that would shakle the car. let off the gas and the howling stops and seems to be OK. it is 'powewered' by stored pressure in the pressure tank so will only get 3-4 good openings before the pressure runs out at idle. The heat dispersion is what is critical. I have a 2001 CRV and makes a high pitch whinning or whistling sound with the engine rpm. Yesterday, I went to the bank to withdraw money from the ATM. 3L Power Stroke Diesel Engines The 7. No noise when idle, or on hitting the accelerator in neutral, so I'm assuming its turbo related. I'm thinking I must have a leaking. Top Maker of Remote Car Starters, Security Systems, and Connected Car Solutions. Any answers will be greatly appreciated. With the push to get more new cars produced, broaden the product line, the life cycle has gotten shorter and shorter, and manufacturers have also taken other steps to outsource some major parts of the car to help in the rush to get this all done. Within 5 minutes or so it starts belching white smoke with heavy unburnt diesel smell. Filled up with a tank of Asda diesel for the first time in a while last night as it was down to 134. Checked again this evening when leaving work and no noise at startup (70*F) and only barely audible once arriving at home. Two-Stage Systems Find a Distributor ‌. My question is just as the posting says, my 2004 SRT4 with 44k miles on it, seems to idle fine via the RPM gauge but makes a strange noise almost like a thunk from the engine bay, and when this happens (happens quite a bit) the boost gauge moves from a pretty much steady -18 to -16, holds there, and slowly comes down till it happens again. If idle speed has not changed , you could check engine transmission mounts. When you move the arm back towards the spot that it is at idle with the VGT plugged in the noise comes back. Gasoline direct injection (GDI) (also known as petrol direct injection, direct petrol injection, spark-ignited direct injection (SIDI) and fuel-stratified injection (FSI)), is a form of fuel injection employed in modern two-stroke and four-stroke gasoline engines. 7 has been making a ticking noise once it starts up and has progressively gotten louder. White smoke in cold ambients is normal. on a 4500 mile trip this past week with about 500 miles left to home motor started making a whooshing sound at 1/2 to full throttle. It sounds almost like a belt rubbing, or maybe turbo whine. TOM: The best thing to do is put in a factory rebuilt turbo, which your Chrysler dealer should be able to install for less than $700. The other noise you might be accustomed to is that of a loud exhaust system. When diagnosing the problem and the cause of the whining noise, take note of when the sound is occurring, such as when the engine is idle, when shifting gears, when driving at. The ECM senses this boost/fuel imbalance and moves the nozzle vanes to the idle position, so your turbo output drops to ~15-17 PSIA. The turbo sounds normal at idle but when you give it a little gas and get the rpms around 2000 it will screech. Cause: The TPS (throttle position sensor) is beginning to fail. A turbocharger will make good and bad noises but with regards to the bad noise, it is best described as a police siren. by Manoli Katakis GM Authority is a must-read for GM news, GM rumors, GM reviews, and information about General Motors vehicles. Its always made that noise since I bought the car with 40k and has now done 80k without the turbo going pop (yet). I was pressing hard on brake pedal while the car was at idle. Its a 2010 ford focus zetec 1. It's semi-rythmatic as the engine runs. I have read about this issue before but cant seem too find it. An interesting kicker I’ve found recently: it seems to be dependent on electrical draw. While the car is certainly way too much fun to be legal, it's not without its problems. At idle the turbo only produces a couple pounds of boost, so unless the compressor or turbine is rubbing its housing, I doubt thats the noise. Looks like the primary clutch is gripping the belt at idle and making the secondary turn. A brief check of the maximum fuel pressure available should also be done at idle. On Friday of last week it had no power. Spent a month or so using Vpower nitro+ diesel as there was a 5p off per litre deal on and the noise disappeared. The aim of the adjustment on Vee Ports, Supersonics and Dual Ports is to make sure that the piston is hard closed at idle and that the piston closes fast enough to minimise backfiring. Water Pump Whistle noise at the water pump may be caused by one of the following conditions: • Low coolant with air moving through the cooling system. • Noisy water pump bearing (rattle or growl). As the serpentine drive system wears, it is not uncommon to begin to hear squeaking, squealing or other belt and/or pulley related sounds. I know it's not the exhaust manifolddone that before. Odd noise from the engine at idle? have to try stopping by a dealer up here in case they can find out something or at least see if it happens with any turbo dart. 4L three-valve V8 engine and experience a rattling noise, rough idle, check engine light, the repair may not be as serious as you thought. None of the dealers had an answer for it. Important Information Threads / Posts Last Post. It has a ruff idle and sometimes dies at the traffic light. 0L Power Stroke Diesel - Ear-splitting squeal at idle - Ok, so first issue I've had with my truck here and my friend that has an 04 is telling me that he thinks it's the turbo. It sounds like you have air in your power steering system. To me it sounds more like a top end noise then a bottom end noise but I could be completely wrong. No vibrations when it's rattling either, just the sound. The Racing High Torque inlet manifold has shorter internal bell-mouths and w also suggest using a Large Bore Throttle. No noise when idle, or on hitting the accelerator in neutral, so I'm assuming its turbo related. It only starts doing this when the engine is hot. Im new here! 2013 2LT Turbo. Doing a quick scan showed no faults, or anything that indicated an issue in the system. Compared to the turbocharger on the 7. I have an 04 Freightliner Columbia. This company is not yet accredited. This is my first post, so I don't know if I am in the right forum for this question. 8T turbo problems '97 - '03 Car Forums. A diesel engine can ping, cling, clang and bang, and all the time you are wondering just what is acceptable and what is not. I decided not to run it anymore until I figure out what the problem is. Mine started around 1K miles and never stopped. The noise level is only 49 decibels at the idle speed. the INTAKE AIR CONTROL CALVE that allows the #2 turbo compressor to feed the engine opens when the throttle is cracked. When you unlplug the VGT to the turbo it goes away, wont come back even driving with it unplugged. Put it all back together made sure to spin both turbo wheels, no play no catching. Followers 3. noise absent at idle and at small throttle openings. Broken springs were noted laying on undercover. • The coolant shaft seal (higher pitched whine, typically heard at idle only with engine warm). I noticed the yesterday my 08 Si has developed a noise at idle that sounds similar to a bad pulley or a bad throw out bearing. As the engine warms, it not longer needs the richer cold idle mixture and the engine runs smoother. Video here:. The turbo-to-exhaust manifold gasket is VERY common to make this terrifying noise. ('03-'05) Any ideas about a squeaking noise from engine at idle? Jump to Latest Follow 1 - 5 of 5 Posts. If the noise only exists when accelerating and is nowhere to be found when in idle, you can be certain that sort of friction issue is going on. Loading Unsubscribe from fireman7753? P0299 lack of power and turbo sticking on a 6. Powertrain power is limited to 325 horsepower. I have a 2001 CRV and makes a high pitch whinning or whistling sound with the engine rpm. This only applies to vehicles in which idle speed isn’t controlled by computer. The best way to increase your diesel truck's fuel mileage is to upgrade with a MPG Performance Module or Duramax Tuner. Ford Transit Common Problems Solutions Hints and Tips. At an idle (and worse in gear) these early Duramaxes will haze smoke at idle. I have a 2002 996 Twin Turbo with 20k or so miles. Its been a week now and I still hear this noise when I start my car and its idling (cant hear it while driving cuz of the normal engine/road noise). Stonebroke pegged it. Whipple Superchargers is owned and operated by its founder Art Whipple and is located in Fresno, CA. An easy way to find one of these faulty PCV valves is to pinch off the supply line to the PCV valve with a pair of pliers while the engine is at idle. The noise goes away when the engine is revved and returns on idle. I have a 2002 996 Twin Turbo with 20k or so miles. sorry about not getting back to you guys I forgot about the forum lol. It does not really change tone when reving the engine. Can anyone tell me what exactly I need to change to get rid of the exhaust hissing noise you hear at idle with a turbo back exhaust? I want the deep rumble I hear every once in awhile when the turbo vanes change. Reply I took it to Porsche today and they told me it was " Engine Noise Traced to cracked Liner on Cylinders 5/6 Will require a strip to determine fault. Loading Unsubscribe from fireman7753? P0299 lack of power and turbo sticking on a 6. After the car has warmed up, you should have about 30lbs of oil pressure at idle and about 60lbs at 3,000 rpm. In the forum you will find an informative tech area, a place for Member's journals, Vendors with special Members pricing, and more!. My understanding is that most DFI engines make a bit of a ticking noise, some worse than others, but I just wondered if I should be at all concerned? Cheers Ben _____ 997. The noise goes away when I rev past 1300-1500 rpm. That even applies to the 2015 Ford F-150, which uses aural trickery to make turbo V6es sound like V8s. Put it all back together made sure to spin both turbo wheels, no play no catching. hope its that simple. It ended up being the valve cover. 2008 Cummins ISX CM871. Rattling noise F150 Fix Rattling noise f150. No noise when idle, or on hitting the accelerator in neutral, so I'm assuming its turbo related. When the engine is warm if you go to the rear of the truck by the exaust pipe, you will hear it idle at different speeds that's the injection switching back and forth between injectors and port injection. If you start to hear this noise from your engine, it's definitely time to have it checked out! The next steps - checking your turbo. I'm new to the forum looking at a 08 turbo with less than 60k miles. Water Pump Whistle noise at the water pump may be caused by one of the following: • Low coolant with air moving through the cooling system. it only does when the car is cold and has been warming up for about a minute. • The coolant shaft seal (higher pitched whine, typically heard at idle only with engine warm). A weird idle problem on a hot engine (or, for that matter, ANY drivability problem under this condition) usually implicates the feedback control system. If you admire Parisians who have the luxury of sipping their coffee with a direct view of the Eiffel Tower, consider this: The average Parisian has a hearing loss equivalent to adding more than 15 years their actual age. I have an extended warranty on the car and will be scheduling an appointment to get it looked at. Turbo Problems from Exhaust Back Pressure on 7. 5l ecoboost engine may have a customer complaint of engine noise most noticeable operating vehicle in confined areas such as a drive-thru or with the hood open. It's probably just random valvetrain 'clatter. Fixed My Ford 6. Truck has a *** and EGR *****. Turbochargers. Snyder is back with more tips & tricks to help keep a Ford 6. Diesel commuter train idle. While these engines were based on the GM Family II engine, the architecture was substantially re-engineered for the new Ecotec application produced since 2000. By Tom Torbjornsen. In all my experience, this is definitely not normal by any standards. It only starts doing this when the engine is hot. ^During cold start-up: most often at the 1,600-1,800 rpm range, or in some instances (elongated timing chain) from the idle speed up to 2,000 rpm. 2L EcoTec with 145k on it. I've been driving the Volvo S60 2. Its a 2010 ford focus zetec 1. I usually hear it as I'm slowing down and sometimes at idle. 3l dit engine obd ii glow plug diagnostics (california). The turbo gauge keeps dropping to nothing under acceleration and there is a weird noise down by my feet. Proceed to the next tip if the noise is still present. During the rough idle, I notice the tach needle quivering and that the engine is revving lower than normal. When the truck warms up a little and idles it has the loudest squeal I've ever heard in my life, like a tea kettle inside my ear type thing. 0 PowerStroke and TorqShift Bulletins. What could that be?. 2 Affected Products Vehicle MAKE MODEL YEAR CHEVROLET CRUZE 2011-2012 Parts. It didn’t happen when the truck was cold but would show up when it had warmed up. ended up being the serpentine belt slipping when fan was engaged. • Start the engine and idle for 5 – 10 minutes to allow for warmup and inspection. 0 Powerstroke F250 diesel - Duration: 14:56. NHTSA ID Number: 10126352 Manufacturer Communication Number: PI0850A Summary This preliminary informational bulletin provides repair information to correct a customer concern of a whistle noise heard from the engine compartment and/or the vehicle runs rough with the service engine light on and/or DTC P0171 set. Most turbo diesels manuals will say to do this after driving for prolonged periods as the fluid going through the turbo can get extremely hot and idling for a while gives the fluid a chance to mix and cool down. I put it down to a combination of things- high revving engines demanding more power, incorrect driver actions (not allowing the engine to idle a while when started and before switching off), poor maintenance and not replacing old oil with a good quality oil. I connected an oscilloscope to the O2 sensor and let the engine idle. I don't know if we have the same noise problem but that is what I did on my CRV. Like MTD I have noticed the difference in performance. This represents the combined *opinion* of the group and should be used as a guide only, as to what is known/possible with 80 Series, as adjustments, technical tips, and accessories. Anyway, Over the past week there was a new noise to my car. I do not think the sound existed for the first week of driving the car either. Whining from the turbo is a for sure sign that your turbo is on its way out. Turned the truck off and started it again and the squeal comes and goes at an idle and gets louder as RPMs increase.