[JeepMud02]

Very weird problem, my jeep whistles at a high pitch after driving for a couple minutes. It never starts right away, you have to drive it for a bit. It also only whistles when i let off the gas or depress it to about 10%. To me it seems like a vacuum issue because once i step on the gas its gone. It will whistle at idle most times, but once i open the hood to find whats going on, it usually stops. The whistle sounds like its coming from the way back of the engine bay, but i can never figure out whats causing it. I also recently had a new manifold installed with the mopar metal gasket. Any ideas?

[unideluxe]

How is your cooling system?

I had the same problems where it was whistling but it ended up being a hole in the radiator, letting out air..especially when the engine was under load.

[TheNewbie]

This reminds me of Jeff Dunham talking about Gay Man.

But sorry, no help on the actual problem.

[jeepercreeper77]

check the manifold bolts. they do come loose and will cause the problem your having.i also have a weber on mine with the aftermarket air cleaner and when i'm driving down the road the carb does make a whistling noise.

[JeepMud02]

all the manifold bolts are tight, the whistle is much louder in the back of the motor, so i cant see it being the radiator. I just got a wash, and i could not get it to whistle at all, so now i have no clue why water is stopping whatever is whining

[JeepMud02]

bumppppppp