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1993 - 240 cold start problem - starts, dies, won't restart 200 1993

posted by  someone claiming to be Roger on  Thu Feb 3 02:01 CST 2005 [RELATED]

Thanks for the tips. I unplugged the AMM this morning and she fired up and sustained running, somewehat rough, but she warmed up to a fairly regular idle eventually.

How is it that the engine can run without the AMM plugged in? I did get a fault code when I unplugged it. I'm just curious if someone can explain the "physics" of what was happenning before (with AMM failure, plugged in), and how unplugging the AMM made it start. Does the AMM air plate fail "shut" and the fuel-air system gets no air and floods out? Then, if you unplug the AMM, does it fail "open" so you can get a start even with a bad fuel-air mixture? I'm looking for some understanding - did I guess right? Knowing stuff like this helps troubleshooting in the future, beyond just blindly plugging and unplugging things, spraying ether, cleaning sensors, etc. But I am still very grateful for the advice, and I am seeing my '93 back on the road very soon when a new AMM arrives.

Roger






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