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Progressively Worse No Start Condition (what next?) 200 1981

posted by  dan52 on  Thu Jul 10 17:04 CST 2003
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It takes three things for the engine to fire; Fuel, spark, and compression. Sounds like you have checked out the first two. How about the third? At 300,000, there could be a lot of reasons compression is not what it used to be. Have you pulled the plugs right after cranking/no start and looked at them? If wet with fuel, could be sticky valves - sticking open and causing no or low compression. Your coment that "the engine cranks rapidly", sounds like it is turning faster than you think it normally would. If true, this also may be an indication of low compression.

Probably worth $20.00 for compresion gauge if you don't have one or can't borrow one.

Fuel delivery could still be a problem. If pressure is low, or injectors gummed up, you may not get good spray pattern out of them. You can check by pulling them and directing the spray into a glass jar. Be very carefull with this test procedure.

I am just thinking out loud, but hope it may help you find a path.

Best of luck,

Dan





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