Sometimes won't idle when cold, sensor going bad?
#1
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Year: 1996
Model: Cherokee
Engine: 4.0L
Sometimes won't idle when cold, sensor going bad?
I don't know where to start here, sometimes (more often than not now) when I first start my car it won't hold an idle. After I drive 10 min or so it will hold an idle but very low, like around 300-400 rpm. After driving a little more it will return to normal. Any ideas where to start? It's a 96 4.0 manual trans 4x4. Thanks
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Year: 1996
Model: Cherokee
Engine: 4.0L
Here's some new info I noticed: usually my check engine light is perpetually on because I've been running with out a cat in my exhaust. I noticed that when my car won't hold an idle the check engine light isn't on. When the check engine light comes back on then my car runs fine.
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Year: 1996
Model: Cherokee
Engine: 4.0
Originally Posted by Dan4governor
Here's some new info I noticed: usually my check engine light is perpetually on because I've been running with out a cat in my exhaust. I noticed that when my car won't hold an idle the check engine light isn't on. When the check engine light comes back on then my car runs fine.
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Year: 1996
Model: Cherokee
Engine: 4.0L
Originally Posted by CattyXJ
Have you ever changed your O2 sensors?
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#6
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Year: 1996
Model: Cherokee
Engine: 4.0
They are on the exhaust pipe. One is on the down pipe just past the manifold and the other is behind where your cat would be. Testing with a multimeter would be easiest. They are like $15 at autozone. Have you taken it anywhere hand had the codes checked?
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