I have a 95 chevy s-10 vortec 4.3 with new CPI injector; ignition modual crank & cam sensors; coil; plugs; dis cap &

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Customer: i have a 95 chevy s-10 vortec 4.3 with new CPI injector; ignition modual crank & cam sensors; coil; plugs; dis cap & rotor fuel pump & filter changed out pcm (3) times only get signal to main injector a few seconds while cranking. will not start. when i switch pcm it does the same thing, gives signal for a few seconds and drops out . can you help resolve this problem? I've asked about this previously.
Answered by John in 2 hours 14 years ago
40+ years of experience

6,206 satisfied customers

Specialities include: Automotive Mechanic, Small Engine Repairs, Auto Body Repairs, Diesel Engine Repairs


You need a scan tool to look at the data.Make sure the ECM is still showing a cranking rpm when the injector quits.Make sure the TPS is not going wide open into clear flood mode.The data going into the ECM must be good for it to function.Test to see if you have 5 volts & a ground at the manifold absolute sensor & the throttle position sensor.

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6,206 satisfied customers
40+ years of experience
40+ years of experience

6,206 satisfied customers



Licensed mechanics

31,131 satisfied customers

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