Question about 1991 Chevrolet S-10

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1991 chevrolet S10 throtle body. I changed fuel pumps and now I am not getting fuel to come out of the injectors. I am getting fuel to the throtle body, but it stopes there.

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CHECK FUEL INJECTORS USING NOID LIGHTS.DISCONNECT FUEL INJECTOR ELECTRICAL CONNECTORS HOOK NOID LIGHT TO SEE IF IT BLINKS IF YES GOOD. STEADY LIGHT MEANS PCM DRIVER CIRCUIT FAILURE MEANS A FAULTY PCM. NO LIGHTS COULD BE FUEL INJECTOR FUSE BLOWED OR SHORT IN INJECTORS WIRES TO CONNECTOR BAD PCM ALSO.

Posted on Jul 11, 2010

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Have you checked the fuel pressure at the fuel rail with a gauge it should be about 40 psi.

Posted on Jul 11, 2010

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Replace the pick up coil in the distributor.

Posted on Jul 11, 2010

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1 Answer

What would cause a 1991 s10 to not start back up


Replace the fuel filter,could be dirty fuel injectors.Check air filter.Also could be a clogged catalytic converter. Bad Fuel pump relay.Your fuel lines could be clogged,blow them out with a air compressor.Maybe try blowing it out first,cost nothing and may be the problem.

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My 93 s10 2.8 just shut off and woulnt start, I'm


Are you not getting fuel to the throttle body? Or are you not getting any injector pulse? BIG DIFFERENCE!

If you have lost injector pulse and spark at the same time, the most likely cause would be a failed distributor module.

Apr 14, 2012 | 1993 Chevrolet S-10

1 Answer

Injectors s10 1991 .the injectors wont spray they have electricyty on the wire on the injectors fuelpomp works have fuel in line .its just the injectors wont sent inpuls.


So your saying fuel pump giving you pressure but ALL injectors are not firing. IF ALL INJECTORS ARE NOT FIRING AND FUEL PUMP IS A-OK THEN ECU IS THE PROBLEM.
However, if a few are not firing then its probably those injectors.

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relace the throtle air idle valve.The temp switch will allso cause this problem.

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My 88 s10 cranks but unless i pump gas pedle it shuts off. changed fuel filter and throtle body sensor still wont idle .press gas pedle it stalls out must pump pedle to keep it running


what engine does it have? 2.8 ? if so replce pick up coil in distributor /4.3 and 2.5 will do this also it affects pulse to injectors and on time firing

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