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least common denominator
 
scottmandue's Avatar
 
Join Date: Aug 2001
Location: San Pedro,CA
Posts: 22,390
Porsche Crest Idle stumble every 5 sec.?

Driving the old 944 around and a new bug appeared. I had been driving around about half an hour - air temp aprox. 60F - Pull to stop light - idle drops to 800-900 for one sec. then goes to normal 1000-1100 then does it again. I notice it seems to be at regular intervals - I count it out and it is about every five seconds.

The car accelerates fine and otherwise seems to run well.

Any ideas?

I am taking the car in to a mechanic for a t-belt job March/April so I would like to get as many little fixes in before that. You know how it is when you take a car to the shop "oh buddy your gonna need a whole new framis system!"

TIA

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Old 02-11-2003, 01:07 PM
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unplug your lambda and see if it still does it.
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Old 02-11-2003, 04:23 PM
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least common denominator
 
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Quote:
Originally posted by todwic
unplug your lambda and see if it still does it.
Is that the O2 sensor?
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1995 Miata Sold
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Old 02-12-2003, 09:59 AM
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Yep, O2 sensor

If it is running fine otherwise, I am more inclinded to believe O2. If it were running rougher, I would think vacuum leak.

Sorry, vague, I know, but this is one of those "could be one of 4 different things" problems

AFJuvat

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Old 02-12-2003, 10:04 AM
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