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GMC Master
4,134 Answers
- Posted on Jul 18, 2016
Re: 1992 5.7 cranks no start
Assuming you are correct, then the only two things still needed are air and compression. As long as the air filter and air intake is not completely clogged, you have air. Perform a compression test to ensure that there is sufficient compression to support combustion.
Plenty of compression some said try new rotor and cap could be cross firing?
Funny you should mention that. If the distributor cap has the coil installed inside it and you are required to swap it from the old cap to the new cap, it is possible for some caps to have an issue where the screws that secure the coil to the cap may protrude slightly into the inner area of the cap, causing what seems to cross-firing, but actually you are sparking to ground. I had to get a new cap and put washers on the screws to keep them from breaking thru the inside of the cap. I figured it out when I looked carefully at the inside of the cap and saw the carbon tracks fro the arcing.
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