Question about 1993 Chevrolet G20
Hmm maybe it is. Check the fuel pressure. An easy way is to pull off the air cleaner and watch the injectors while you crank it. They should be pulsing fuel out. Of course you have to take the doghouse off and everything. While you are at it you should check for spark at the plugs.. get an old spark plug and plug one of the other plug wires into it. let the metal part of the plug be touching the manifold and crank it over. You should see a bright spark. Those two tests should tell you where the problem is. spark and gas is the biggest part of an engine running or not. of course timing is important as well but rarely does that go out these days.
Posted on Aug 22, 2010
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Posted on Jan 02, 2017
SOURCE: VAN WONT START
: Sounds like you have
attacked the problem pretty well. Check the fuses. Do a
"pin" check for power and ground to the ECM. When you
replaced the ECM, did you use a new prom? If not, you
could have a faulty prom. Check fuel pressure and using
a Noid light check the pulse at the injectors. For your
information, the injectors will have 12-volts and the
computer momentarily grounds them to open the injector.
Your problems may be caused by a faulty ignition switch or starter solenoid.
Intermittent electrical problems are difficult to trace. We would suggest first checking the ignition switch and next the neutral safety switch
You are close to the right track but check the fuel pressure during the no start condition as you may have a faulty fuel pump. You also could have a vehicle speed sensor problem
Posted on Dec 15, 2008
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