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Before you trash the AMM... 200 1993

uid 18083's pic
posted by  lucid on  Thu Feb 3 05:40 CST 2005
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

...Don't rule out a poor/corroded contacts in the AMM connector plug. Look to see that they are all aligned the same, and appear to have equal tension.

Some advocate spraying with contact cleaner, followed by application of dielectric grease as a corrosion barrier.

The "bad AMM" is sending wrong (or missing) signals to the ECU. Controlling the FI operation based on the bogus AMM input causes the no-start (i.e. too lean possibly).

When unplugged, the ECU sees no AMM signals and defaults to "limp home" FI settings, which allow starting but poor running (which may improve once warmed up?).
--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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