Chevrolet S10 Problem Report
Chevrolet S10 excessive cranking in the morning, surging and missfires
hard starting after several hours and upon start up, engines missfires and runs rich Possible fuel pump regulator failure under the upper intake leaking fuel directly into the intake system. You must replace the regulator assembly and possibly the spider( injector cluster) to resolve the problem. Allowing the engine to run like this for an extended period could result in cylinder wall wash down resulting in internal engine damage. - mastertech6371
The first code I had was random misfire. After changing the ignition coil, spark plugs and wire...
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How do I adjust the valves on my 1991 s10 2.5 liter 4 cylinder?