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Re: No Start - Ignition Control Unit 700 1989

posted by  someone claiming to be Don Foster on  Mon Jan 1 01:57 CST 2001 [RELATED]

Bill --

A defective engine temp sensor (the one near cylinder #3, not #2) or a bad connector, connection, or wiring can "fool" the ecu into thinking the engine is at about minus 40 degrees, which is pretty damned cold (regardless if it's F or C).

The ecu will respond by dumping in tons of fuel. If it doesn't ignite, this fuel will wash down the cylinder walls into the oil.

Loss of oil on the walls means loss of compression. You can correct this by squirting a teaspoon or two of clean motor oil into each cylinder. (When it fires, expect smoke for 5-10 minutes.)

A symptom of this is an engine that cranks fast, and has a tendency to "wanna start." That is, a few pops, farts, grunts, etc.

Also, if you've had this problem, change the oil at the earliest convenience. It's diluted with gas, which means it won't lubricate well, and it also poses an explosion risk.



Don Foster (near Cape Cod, MA)





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