Help code 26 & 21
09-05-2011, 02:53 PM
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Year: 99
Model: Cherokee
Engine: 4.0
youd be amazed at what an o2 issue will cause as far as how well the vehicle runs. i think there is something in the wiring with mine cause weve already replaced the o2's twice and all the computers, etc seem fine... so best we can figure, there is a loose or corroded wire.
ive discovered a bit of a trick with mine: if i go WOT thru first gear, it will clear it up. the issue is a buck and chug and hesitate thing. it also pops (i guess you could call it a backfire) at the manifold. but like i said, WOT for a few seconds and it wont run rough till it gets started again...
ive discovered a bit of a trick with mine: if i go WOT thru first gear, it will clear it up. the issue is a buck and chug and hesitate thing. it also pops (i guess you could call it a backfire) at the manifold. but like i said, WOT for a few seconds and it wont run rough till it gets started again...
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