Re: Spark plugs and idle issue on '00 4.7L Dak

From: Michael Maskalans (dml@tepidcola.com)
Date: Mon Nov 14 2011 - 09:25:54 EST


On 14-Nov, 2011, at 09:10 , Marc W. Grobe wrote:

>
> Second issue is that his idle has been surging at times. He's currently undergoing cancer treatment so some of what he has described to me can be a bit confusing, but I believe he was suspecting the IAC. I believe he felt it was that due to it being better after cleaning the throttle body, but after a few thousand miles the surging would return. The only other culprit that I feel is likely is the TPS.

TPS shouldn't cause an idle surge, if plugs and filter don't take care of it I'd continue to suspect IAC. It's really _the_thing_ that controls the engine at idle. Nothing else changes airflow with a closed throttle, and a minor change in richness shouldn't cause a noticeable surge.



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