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poor running with AMM, better without 200 1991

posted by  machine man on  Fri Sep 30 20:16 CST 2016
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last visit: Wed Oct 22 15:40 CST 2014
[RELATED]

Seems like everyone is centered in on the AMM and from what it appears not to be doing is running on one.
I like the bad connection theories too.

You mentioned that it has been getting worse over the years and wondered tune about tune ups.
Going there I thought about the power stage amplifier relay for spark may need a servicing.

I also want to ask if it appears to begin to run very lean after warmup.
We should not forget the Engine Coolant Temperature sender not changing value.
I want to throw this in because if it is still using the warmth of summer and if it gets colder later in the year it will run even worse.

Good luck with any connections or connectors in any case.

Phil






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