Question about 1991 Chevrolet S-10
Injector pulse is driven by the computer from the signal it receives from the ignition module. Check to see if there is spark because that could also be an indicator of a failed module or distributor component but having spark does not eliminate the module. It does eliminate the pole piece. If there is no spark and no injection pulse, you have to check for voltage to the B+ side of the coil. If it is there, remove and repair the distributor. If it is not there, you have to trace to see for a breakage, loose connection, bad ignition switch etc.
If is were a betting man, I'd say it's either the injector fuse or the ignition module.
Posted on Mar 29, 2015
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Posted on Jan 02, 2017
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