Chrysler :: Whistling AC When Car Slightly Accelerates To Recover Speed
Jul 18, 2014
After almost a year of fruitless trips to my local service center of a national used car dealer, I am still having a problem with an in-cabin whistle. This is the problem: There is a whistle inside the cabin of the car when:
1) The AC compressor is on,
2) The car is under slight acceleration, and
3) The engine is running at one of the following RPM ranges: 1500-1800 RPM, 2500 RPM, 3000 RPM.
It will happen at any speed: pulling out of a parking space, or running down the interstate. On a long trip, the whistle will occur every 45-60 seconds while on cruise control, as the car slightly accelerates to recover speed.
I have read that it is likely the AC Expansion Valve (two other posts on CarTalk), but my question is Why the dependence on the engine RPMs? I can make the car whistle continuously if I run the car at 2,500 RPM in 5th gear on the interstate. At 2,400 RPM or 2,600 RPM, however, the whistle disappears.The used car dealer can reproduce the problem on the road but not in the shop.
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I've a new Santa Fe bought in March this year. Car works perfectly but i just noticed a whistling noise problem coming from the top/back of the car (it si located over the roof) when reaching speed of 70mph or above.
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Just wanted to post a recent experience I had with the catalytic converter issues Escapes seem to be prone to. A friend has a 2003 Escape 4x4 with the 3.0 V-6 and automatic transmission. It has 141,000 miles on it, she bought it with 40,000 miles on the vehicle.
Recently it developed driveability issues: No power with a whistling noise and top speed of 10 M.P.H. I researched on here and her symptoms matched threads that came up using the search function. I told her I was pretty sure the front cat was bad and had plugged the rear cat, causing the issue. She took it to a local repair shop and confirmed my diagnosis. Their estimate for repair was north of $1,500.00. My neighbor and I were sure we could repair it cheaper.
We towed it to my house and pulled the front and rear-most cats. As suspected they were both bad. The back cat on the engine looked pristine inside so we left it alone. We ordered all of our parts from rockauto. New front and rear-most cats, exhaust and intake gaskets, serpentine belt, and one O2 sensor that was damaged when the insides of the front cat let go.
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