rough idle but is smooth while driving
#1
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Location: Agawam, Ma
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Year: 1997
Model: Cherokee
Engine: 4.0
rough idle but is smooth while driving
anyone got any ideas as to what it might be at a idle it sometimes is rough and other times not but while driving its smooth
#6
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Year: 1997
Model: Cherokee
Engine: 4.0
thanks i already went and replaced the plugs wires cap rotor and did a oil change so i will check the mounts when i get home
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#9
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Year: 1999
Model: Cherokee
Engine: 4.0
I have the same problem. I have replaced everything ignition wise. Ran Seafoam 3 times in the intake, and (3) 16 oz cans in 3 straight fill ups. It idles better, but not like it needs to. I think i am looking at a head replacement. i also have a so so compression in cyl 4, BUT, I get a misfire code for cyl 1, never for 4..... WTF? This winter I am going to R&R my head, need to replace my exhaust manifold anyways.
#10
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Year: 2000
Model: Cherokee
Engine: 4.0 liter
Does the 4.0 Cherokee engine have an egr valve (like my S10 Blazer)??
If so I've had several experiences over the years on one 4.3 V6 where pieces of carbon get hung in the egr valve and cause rough idle issues. Nothing fixed it, not the GM "upper" foam cleaner, not brushing out the passageways, not replacing the egr. It lasts awhile and then comes back (it'll go away when I sell it)
If so I've had several experiences over the years on one 4.3 V6 where pieces of carbon get hung in the egr valve and cause rough idle issues. Nothing fixed it, not the GM "upper" foam cleaner, not brushing out the passageways, not replacing the egr. It lasts awhile and then comes back (it'll go away when I sell it)
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