TBI trouble

Tiny
CURIOUSCAVEMAN
  • 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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Saturday, June 25th, 2011 AT 7:32 PM

4 Replies

Tiny
JDL
  • EXPERT
  • 16,353 POSTS

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.

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Saturday, June 25th, 2011 AT 7:36 PM
Tiny
DOCFIXIT
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  • 18,993 POSTS

Most common is faulty Ignition module in DIST

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Saturday, June 25th, 2011 AT 7:36 PM
Tiny
CURIOUSCAVEMAN
  • MEMBER

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?

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Saturday, June 25th, 2011 AT 7:45 PM
Tiny
DOCFIXIT
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Take it to an AutoZone they will test

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Saturday, June 25th, 2011 AT 7:50 PM

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