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7

It is quite likely the work performed has introduced a subtle air leak that only manifests itself under high boost. Pressurizing the intake tract with the car off will help you identify the source of the leak. A hose fitting that isn't honked down all the way will exhibit this kind of behavior under boost. I like how Jafro figured out the source of his ...


3

I Believe It's a Hose Connection Point Unmetered air whether it's a negative pressure or positive pressure is bad. That being said, I find it interesting that losing some of the boost isn't detected and triggering a CEL. So that maps to your idea of a smaller leak along with the not subtle high pitched sound. You said If it were a bad gasket, I'd ...


3

It sounds like you have a drag in the front end accessory drive (FEAD) system. Generally screeching noises occur when the FEAD belt slips. --Could be a dirty or worn belt. You said the car has 97K miles on it, you said "The belts look pretty new, no cracking." Is that a new belt or is that the original belt with 97K miles on it? If the belt is dirty or ...


3

The culprit in this specific case was the steering pump pulley - it developed a slight play along the axis and the auxiliary belt started rubbing the sides of the pulley ridges. Since no one has a more comprehensive answer for similar issues I can try answering it myself now that I am more knowledgeable in this area. Causes of the noise The auxiliary ...


3

The car usually has trouble starting on the first try. It'll start and immediately stall. If it's warm out, I can pump the gas pedal once and it starts up fine. Otherwise, it might take a couple more tries and I have to let it warm up for 30 sec. to a minute before I can drive off (otherwise it stalls as soon as I put it in gear and push on the ...


3

I have three Wranglers, and there are plenty of places on them to squeak, and not all of them have grease nipples. The most common places that will cause a squeak on the Wrangler, in order of likeliness) Track Bar bushings (rubber bushings, no grease point) Tie rod ends at the axle (usually grease points at both ends) Drag Link (usually greasable at both ...


1

The gauges in the dash are actuated by motors. When you turn the vehicle on, they do their "power on self test" and start doing their thing getting the gauges set correctly. If one of them is having an issue, you could be hearing the scratching noise because of this. I had an '04 Suburban which had the speedo go bad and this is exactly what it sounds like. ...


1

Sounds like a plenum (ventilation duct) fan bearing is slowly going bad based on the sound from underneath and behind the glove box.


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Your rubber is grinding against the front wheel well liner - there is a plastic area there your tire grinds against on full lock because you upsized your wheels. Solution - take a heat gun and warm up the area where the tire grinds, then push it out a bit. Don't overheat as it easily melts. Here:



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