Very rough idle on first start of day
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Model: Cherokee
Very rough idle on first start of day
My 95 Grand Cherokee idles very rough for a few minutes after the first start of the day, then it smooths out and starts / runs fine the rest of the day. It starts up well, just misses and idles very rough for about 5 minutes. I have changed the spark plugs, and cleaned the throttle body and ICV valve. (I put in a new crankshaft sensor recently as well, and it ran fine for a few weeks until this problem developed). There are no warning lights showing and no error messages. Any ideas?
#2
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Year: 1995
Model: Grand Cherokee
Engine: 4.0 with all of the noise and clatter
Put a fuel pressure gauge on the test port, start the engine and let it run for a minute, record the fuel pressure and shut the engine off. Let it sit over night with the guage still on the test port, in the morning check the pressure. It should not be at zero.
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Year: 1988
Model: Cherokee
Engine: AMC242
My 95 Grand Cherokee idles very rough for a few minutes after the first start of the day, then it smooths out and starts / runs fine the rest of the day. It starts up well, just misses and idles very rough for about 5 minutes. I have changed the spark plugs, and cleaned the throttle body and ICV valve. (I put in a new crankshaft sensor recently as well, and it ran fine for a few weeks until this problem developed). There are no warning lights showing and no error messages. Any ideas?
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