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Old 08-08-2017, 08:01 PM   #1
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Missing at low RPMs

My car started missing at idle, just pulling out or at very low RPM while driving. As soon as I get above 3k it smooths out and runs great. Come to a stop and while idling it huffs and puffs. This happens in any gear if I am lugging around, idling, or just trying to pull off smoothly from a stop light or whatever. Any ideas?


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Old 08-08-2017, 08:26 PM   #2
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loose coil pack wire? bad plug? codes?
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Old 08-08-2017, 08:31 PM   #3
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No codes as yet, but I suspect there will be some soon. I can keep it running smoothly by keeping my foot in the throttle a bit, even when parking. But if I don't, it will miss badly. I haven't taken the cover off yet. It just started this morning and I wasn't really sure what to check. The coil pack or wire could be a good place to start though. Perhaps with quicker spark it works normally. Tnx


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Old 08-08-2017, 10:03 PM   #4
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Vacuum leak. At idle a leak has a greater effect than at higher airflow rates. Lean condition causes misfire.
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Old 08-09-2017, 07:47 AM   #5
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Quote:
Originally Posted by 911monty View Post
Vacuum leak. At idle a leak has a greater effect than at higher airflow rates. Lean condition causes misfire.


Thanks Monty! That makes perfect sense


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