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Old 03-12-2012, 10:57 AM   #1
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Stuttering when starting to move

So lately my jeep has been stuttering when starting off from a stop. It seems to be getting worse, last week it threw a P0320 and P0420, I replaced the CPS, the O2 was replaced last year. Still having issues when I start off, not every time but frequently enough that I worry about it dying. I have to rev the engine quite a bit to get the issue resolved. Any ideas at this point would be helpful.

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Old 03-12-2012, 11:02 AM   #2
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May be a fuel flow issue like a dirty fuel filter or clogged/dirty injectors. Replace the filter and run some Seafoam through the tank.

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Old 03-12-2012, 11:05 AM   #3
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I've done that and it seems to help for a while but it always keeps coming back. Could it be the TPS? Not that I want to spend more money but with my son learning to drive a stick, I'd like it to not freak him out. Seems to happen more when the jeep is warm.
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Old 03-13-2012, 01:09 PM   #4
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Did it again this morning after driving for a while. CEL is on now, will have to wait to pull the code when I get home. It was running fine until warm, then it starts to buck and stall when taking off at lights.
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Old 03-13-2012, 01:14 PM   #5
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I'll tell you like I tell my son, take a deep breath, calm down then say what you want to say. it really helps him to not stutter.

Could be TPS, dirty throttle body, IAC. I'd start with those first (well I'd start with that code it just threw first) and go from there. IAC and TB can be cleaned so hope its one of those being dirty.
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Old 03-13-2012, 01:20 PM   #6
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Is it occuring while you are letting the clutch out in 1st gear and then stops bucking when the clutch is fully engaged?
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Old 03-13-2012, 01:31 PM   #7
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No, it does it after, sometimes I have to push the clutch back in and rev the engine to clear it.

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