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AMM's - the good, the bad, and the ugly! 200 1985

posted by  BretC on  Sun Sep 24 15:51 CST 2006
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last visit: Tue Nov 22 16:58 CST 2011
[RELATED]

OK - I am very satisfied with the way she's running when warm, good power, acceptable idle. But there is one mildly irritating thing going on that I'd like to resolve... The problem is that cold starting is difficult. It will start right up when cold, but will stall a time or two before the engine warms up. Rough idle during this time as well.

Here's what I find to be the most interesting part... I've got two AMM's (007's). With one of them, I'll call it the "good" one. I get very good idle, and smooth running -- when warm. However, it has the cold start problem. With the "bad" AMM, I get very smooth high-idle starts, but the car runs rich as hell after it's warmed up --- black exhaust, sputtering, etc. Here are the results after testing with my cheap wally world multimeter (reference numbers from Bentley:
-
Good AMM: Heated Wire - 3.1 ohms (reference is 3.5 to 4.0); Potentiometer - 323 ohms (reference is 0-1000)

Bad AMM: Heated Wire - 3.0; Potentiometer 282

Ugly AMM: In a landfill somewhere

Of course I'd like to get advice on the cold start problem, and how it might relate to the AMM(s)???

Thanks for any ideas or advice you come up with! I'll be sure to follow-up with results as I go along.
--
1985 245 NA, wanna-be dogmobile






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