I hav a 90 xj 4.0 5 speed,it isles smooth as silk until it warms up thn has a pretty bad miss. I can Giv it fuel an it smooths out. It's only at low idle wn warm. Any ideas?
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I hav a 90 xj 4.0 5 speed,it isles smooth as silk until it warms up thn has a pretty bad miss. I can Giv it fuel an it smooths out. It's only at low idle wn warm. Any ideas?
When was the last time your O2 sensor was replaced?
230 hp 4.3L Chevy
Built 4L60E with manual lockout
Atlas 4 speed
Griffin radiator
On board air
Warn 9.5ti on custom bumper
7.5" RE front and bastard pack rear on custom long arms
30 gal gas tank
lockers
And a bunch of other stuff
its a renix system,clean the iac (idle air control) then check the map sensor on the firewall be sure it is hooked to the TB and is getting vac. rough idle after she warms up means that when the computer releases control of the rig to the sensors one of them is not working correctly. I also agree with Steve on the O2 sensor , but will add, get a good one, factory if you can afford it ,XJ's dont take well to the aftermarket variety
Aint got no whistle, don't belch out smoke, but my V10 aint no joke !!!
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