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No fuel

Tiny
HVACDUDE924
  • MEMBER
  • 1992 CHEVROLET SUBURBAN
  • V8
  • 4WD
  • AUTOMATIC
  • 283,000 MILES
No fuel through tbi on a 92 chevy suburban 5.7L truck
Friday, January 21st, 2011 AT 12:29 AM

20 Replies

Tiny
DOCHAGERTY
  • MECHANIC
  • 9,601 POSTS
Have you got fuel pressure? Have you checked the fuel pump? Is there fuel in the tank?
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Friday, January 21st, 2011 AT 12:30 AM
Tiny
HVACDUDE924
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  • 10 POSTS
Brand new fuel pump if I disconnect the inlet line to the carb and crank over tons of fuel comes out just not through the tbi have over 1/4 tank of fuel about ten gallons
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Friday, January 21st, 2011 AT 12:37 AM
Tiny
DOCHAGERTY
  • MECHANIC
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Throttle body injection is not my strong suit but if there isn't a signal to the injector, then I would tend to start looking there. The reasons are too numerous to list here. From a poor connection to a failed component.
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Friday, January 21st, 2011 AT 12:47 AM
Tiny
HVACDUDE924
  • MEMBER
  • 10 POSTS
Tryed that getting a 12 volt pulse while cranking the motor over called chevy tech support and they couldnt help over the phone because of legal reasons
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Friday, January 21st, 2011 AT 12:49 AM
Tiny
DOCHAGERTY
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I am going to get a Chevy guy on this with you mate, help is on the way!
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Friday, January 21st, 2011 AT 12:53 AM
Tiny
HVACDUDE924
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Thank you very much
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Friday, January 21st, 2011 AT 12:57 AM
Tiny
DOCHAGERTY
  • MECHANIC
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I went right to the top. One of the site admin is my good friend. Mike will dispatch the resident Chevy expert straightaway!
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Friday, January 21st, 2011 AT 1:02 AM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Are you getting spark? If not and no injection -check and test the distributor pick-up coil-let me know

Probable cause could als be the computer ground driver circuit-Let me know
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Friday, January 21st, 2011 AT 8:56 PM
Tiny
DOCHAGERTY
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Thanks Ras!
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Friday, January 21st, 2011 AT 9:00 PM
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Np there Doc, You have a great day and a sunny one-later BTW Mike gave me to look at it-I'll take from here-Bye
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Friday, January 21st, 2011 AT 9:11 PM
Tiny
HVACDUDE924
  • MEMBER
  • 10 POSTS
I will try that in the morning thank you. What should I be getting for voltage 12volts
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Friday, January 21st, 2011 AT 11:11 PM
Tiny
RASMATAZ
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Measure the resistance on the pick-up coil and for short to ground

Distributor Pick-Up Coil Short & Resistance Checks
Disconnect pick-up coil leads from HEI-EST module terminals "N" and "P". Set ohmmeter to middle scale, and connect one lead to either pick-up coil lead and other lead to distributor housing. See Fig. 9. Flex pick-up coil leads by hand to check for intermittent shorts to ground. If reading is not always infinite, replace pick-up coil.
Connect ohmmeter between both pick-up coil leads. Check for intermittent opens by flexing wires and connectors. If resistance is not 500-1500 ohms, replace pick-up coil.
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Saturday, January 22nd, 2011 AT 1:28 AM
Tiny
HVACDUDE924
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Pick up coil is 722 ohms. And from either side to the housing it was infinite.
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Saturday, January 22nd, 2011 AT 8:19 PM
Tiny
RASMATAZ
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Do you have power at one side of the injector harness?
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Saturday, January 22nd, 2011 AT 8:23 PM
Tiny
HVACDUDE924
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Is that either clip connection on each injector. If so when I crank the motor over I was getting voltage
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Saturday, January 22nd, 2011 AT 8:32 PM
Tiny
RASMATAZ
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Hook up a noid lite on the injector harness, if its not pulsing -check the injector driver circuit of the computer
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Saturday, January 22nd, 2011 AT 8:38 PM
Tiny
HVACDUDE924
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I was getting a constant 12 volts. Where would the injector driver circuit of. The computer?
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Saturday, January 22nd, 2011 AT 8:43 PM
Tiny
RASMATAZ
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Its contained within the computer. Use a noid lite to be sure-you got power to the injector and the noid lite is not flashing think! Computer
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Saturday, January 22nd, 2011 AT 8:52 PM
Tiny
HVACDUDE924
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Ok ill try it. Thank you
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Saturday, January 22nd, 2011 AT 8:53 PM
Tiny
HVACDUDE924
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Hooked up the noid lite. And nothing happened no light when cranking over
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Saturday, January 22nd, 2011 AT 10:20 PM

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