High pitched whine when I let off the gas.
I have a 98 xj with a straight six. When ever I let up on the gas pedal I hear a high pitch whining. As soon as I hit the has even in the slightest it goes away. I did just have a new exhaust system put in so its actually a lot quieter so I dont know if it was there before as well. Any thoughts?
If you hear it while the Jeep is not in motion, try raising the hood and adjust the throttle by hand while listening for the whining. Sounds like a vacuum leak in a way, but could be the power steering pump, water pump, or anything in motion.
A family 87 Cherokee Laredo also produces a high pitched whistling sound at idle once it's warmed up. Someone suggested it could be a leaking intake manifold gasket. I would like to know how to diagnose this issue and get info on how urgent it might be to deal with.
Nolo Secundi Carborundum Illegitimi
Originally Posted by Winterwheeler View Post
I just got done tightening all the bolts on the exhaust/ intake manifold. I let it warm up for 10 minutes and drove it for another 10 and I dont hear the noise. Hopefully that was the cure. I did find one bolt against the firewall on top that was a little loose. I will check back in at the end of the week for the final decision.
|4.0 liter , 98 jeep cherokee , whining noise , xj|
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