My 01 xj is making a loud annoying whistle after it warms up a minute and when i am not accelerating. It does stop if i sit in idle for a minute, but will start back up as soon as i start to move again. If i am in the accelerater at all it does not whistle. Sounds like a vaccuum leak to me. Local mechanic cannot figure it out!! Any suggestions?
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01 XJ is making loud whistle
- Thread starter hall8211
- Start date
muddypunk
TOOL
- Location
- Coupeville Whidbey Island washington
Intake exhaust gasket or a small crack in the Exhaust manifold.
Original_MudButt
NAXJA Forum User
- Location
- In the eighth dimension
If you suspect it truly is a vacuum leak, check the vacuum line that runs under the battery tray to the vacuum accumulator behind the front bumper.
It's very common on the XJ's, as battery acid and rubbing on the tray causes it to leak.
The line is black hard plastic. The accumulator is also, and about the size and shape of a softball. It's mounted behind the front bumper passenger side.
It's very common on the XJ's, as battery acid and rubbing on the tray causes it to leak.
The line is black hard plastic. The accumulator is also, and about the size and shape of a softball. It's mounted behind the front bumper passenger side.
98NWCherokee
NAXJA Forum User
- Location
- Portland, OR
Had a whistle in my 98 underhood and found it to be the breather tube for the PCV system. It had worn a hole at the top of the tube and I suspect it was rubbing against the hood. Jeep had it in stock and I believe the entire piece cost me around $20.