GM Blazer/Jimmy/Typhoon/Bravada 1983-1993 Repair Guide

BASIC FUEL SYSTEM DIAGNOSIS

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When there is a problem starting or driving a vehicle, two of the most important checks involve the ignition and the fuel systems. The two questions most mechanics attempt to answer first, "is there spark-" and "is there fuel-" will often lead to solving most basic problems. For ignition system diagnosis and testing, please refer to Engine Performance & Tune-up of this guide. If the ignition system checks out (there is spark), then you must determine if the fuel system is operating properly (is there fuel-).

 
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