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TBI trouble

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

4 Replies

Tiny
JDL
  • MECHANIC
  • 16,098 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
  • MECHANIC
  • 18,828 POSTS
Most common is faulty Ignition module in DIST
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Saturday, June 25th, 2011 AT 7:36 PM
Tiny
CURIOUSCAVEMAN
  • MEMBER
  • 2 POSTS
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
  • MECHANIC
  • 18,828 POSTS
Take it to an AutoZone they will test
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Saturday, June 25th, 2011 AT 7:50 PM

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