Mechanics

TBI TROUBLE

1991 Chevrolet Truck • V8 4WD Automatic •

My chevy K1500 with TBI 5.7 will not start it has spark the fuel pump is working but no fuel comes out of the injectors. What should I check next?
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Curiouscaveman
June 25, 2011.



Without rpm signal, there will be no injector pulse. Any applicable mil codes? You can check voltage and ground for the injector/s. Use a gage and check fuel pressure.

JDL
Jun 25, 2011.
Most common is faulty Ignition module in DIST

Docfixit
Jun 25, 2011.
I don't have a gauge but disconecting the fuel lines and jumping the relay gets me a good stream of furl to the throttle body. I put a test light in the injectors and one side of each of them has power. I think the white wire on one and the red on the other not sure but one each. Is this right?

How do I test the ignition module in the distributor?

Tiny
Curiouscaveman
Jun 25, 2011.
Take it to an AutoZone they will test

Docfixit
Jun 25, 2011.