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Abrupt hot no-start 700 1990

posted by  boxvolvo on  Sun May 15 14:33 CST 2016
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last visit: Fri Oct 24 04:28 CST 2014
[RELATED]

Sounds like you're close to a fix. Couple of thoughts on your original post.

If you were getting brief firing with starter fluid, and good spark, the ignition amplifier is not likely to be the culprit. A failed ignition amp will cause a no spark condition.

Back probing an injector. If you hook up a test light to an injector in the usual fashion, e.g., one wire to ground and the other to probe, the results will be non-revealing for firing. Injectors fire on a constant 12V from the RSR, and a timed ground from the computer. Grounding the test light will produce a constant light when the injector 12v side is probed (which means the RSR is working), and no light when the injector ground side is probed.

Sounds like you have Bosch? One of the main causes of a accelerated failed or failing main pump is a failed or failing in-tank pump. The car will run (for a while) with a dead in-tank pump until the overworked main gives out.





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