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varying idle?

88'XJ

NAXJA Forum User
Location
ny
okay...i have no tach...but i'm guessing it kinda "revs" on its own +/- 200 rpm's

did a quick search and found some info on tps sensor?

i would like to get it to idle smoother...

the ony other thing i can think of is that hte fuel filter looks like it hte original...@127,700 miles...but it does not cut out up top at all.

thanks for the help
 
Two things tend to cause this. A vacuum leak or a bad/dirty IAC.
 
common vacume leak area's? 4x4 works good...heat valve moves great...

is it a vacume line to the intake/motor?
 
the plastic line running to the vacuum canister in the bumper. It's underneath the battery, pretty common. Check the vacuum harness up front, by the power steering pump. I had to do some fixeing there on mine.
Check the intake manifold bolts, with a torque wrench, see if it's loose.
 
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