My jeep makes a whistling sound after driving it for a few minutes. It gets faster and louder as I speed up. The whistling sound goes away at idle. I press the gas at idle and let the rpms go up and it don't whistle. It only whistles when driving. I put it on jack stands and put it in drive to see if I could hear it, still nothing. It's coming from the front. I can't actually pinpoint where at in the front, because it only does it while driving. 93 auto 4.0 4wd. any help would be great.
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whistling sound
- Thread starter imthehink
- Start date
Blaine B.
NAXJA Forum User
- Location
- Northwest Indiana
Maybe your window or door gaskets are bad and it's just the wind?
YELLAHEEP
NAXJA Forum User
- Location
- Littleton, Colorado
jeeptree said:
Ditto. My '93 had a whistling that sounded like a toy train whistle when I throttled up. It did it more often when I would be driving, but would do it while parked too. It took me forever to figure out that it was a bad bearing in the idler pulley.
Mine is a 5sp so I can't figure out why the original poster's vehicle would do something similar, but not when in park. Mine was also much louder when cold, quieter or gone when warmed up.
Might not be a bad idea to check the condition of the vacuum hoses and PCV, then spray around the intake manifold under the throttle body and around the intake runners to the head - using carb cleaner as the spray material will cause the idle to bump up if a leak sucks in the carb cleaner.
Another thing: check the condition and fittment of the vacuum line from the engine to the brake booster. I've heard boosters whistle when the gasket around the one-way valve that plugs into the booster goes bad. Check to see that the booster is holding it's vacuum by starting the XJ, then turn it off, then pull the one-way valve out. You should get a rush of air into the booster as the vacuum seal is broken.
Blaine B.
NAXJA Forum User
- Location
- Northwest Indiana
Nice
Sting25
twitter.com/cmchadwick
- Location
- Wheat Ridge, Colorado
My jeep makes a similar noise...I get the whistle sound when driving only with the engine under load...I think it has to do with my A/C because the one time I could make it reproduce while sitting in the garage was when I was refilling the Coolant. I either didnt do this right or my a/c is shot so I am going to try it again soon just havnt gottn around to it yet but i think thats where my noise is coming from.
Blaine B.
NAXJA Forum User
- Location
- Northwest Indiana
Is that A/C freon or engine coolant?
Either way the leak = bad :lecture:
Either way the leak = bad :lecture:
Blaine B.
NAXJA Forum User
- Location
- Northwest Indiana
That leaking hose - that goes to the heat valve, right?
Blaine B.
NAXJA Forum User
- Location
- Northwest Indiana
Strange, I think the hose is still bad because it was seeping out from the middle of the rubber....not where the hose meets the metal "nipple"
a7273chargerguy
NAXJA Forum User
- Location
- tulsa ok
check the vacuum line going to your front diff.BRYAN.
StuckXJ
NAXJA Forum User
- Location
- Massachusetts
Mine does it too. I've narrowed it down to the A/C clutch. I noticed it does it when its cold, and I put on the defrosters which will cycle the A/C. I havn't fixed it but, mine doesn't do it all the time so it doesnt bother me.
