Question about GMC Suburban

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I am getting fuel to the tbi but it wont spray through the injectors please tell me what is wrong with it

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  • ski875kelly Aug 13, 2008

    no power when excelerating

  • Randy Harkins
    Randy Harkins Aug 23, 2008

    ok first before anything disconnect the inector connector yurn on the key

    use a test light to make sure you have power on one of the terminals on the connector, if so good now take the clip from the test light on one of the terminals of theinjector connector ,you may need to make something to make the connection like a paperlip bent or something, the other end of the testlight goes in the other side of the connector turn on thekey the light should light. Crank the engine the lighgt should blink if not contact me if so good the computer is controlling the injector,

    Check the OHMs of the injctor it must be AT LEAST 1.0 Ohms If you do not have power to the injector as stated early in this explaination contact me and I will look up the wiring diagram and email it to you, most times those injectors fail electrically and the computer injector drivers go dad because the injector resistance drops too low.

    If this information is helpful give me a fixya Rating please and contact me at

    fixincars@yahoo.com to talk more or call me at 253-235-0057

  • rhendrickson Sep 27, 2008

    no spark and no injector spray

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Add techroline fuel injector cleaner and replace your fuel filter to increase the flow of gas to the injectors. You may need to repeat the cleaner until the injectors are clean.

Posted on Jul 19, 2008

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1 Answer

My 1993 Geo tracker fuel systen is not working, the injector is not spraying. now it is sprayin on the inside of the carborator and filling the carborator up.. how do i fix this problem//


there is no CARB on this car.
that must be the throttle body engine, TBI EFI.
1 injector engine not the 4 MPI engine.
G16a is TBI G1b is TBI and both sold day 1 , new.
its is supposed to spray, but you forgot to say when.
just key on over and over not running, (not spray is correct)
it sprays cranking and running,, that be its job1.

lets say it sprays key one.
That means:
1: injector leaks.
2: injector - o-rings are bad. (cracked)
3: ECU injector drivers shorted (bad ECU)
you can look at the inject on this car, air pipe off TBI horn.
see if the seals leak or injector tip leaks ?
if the injector actually leaks.
unplug the injector connector (4pin plug)
leak now.
yes, injector is bad or just o-rings
no, the ECU is bad. (common on this car)
i can even tell you which transistors are bad.... etc.....ask.

both engines covered here.
http://www.fixkick.com/INJECTORS/injectors.html

Dec 09, 2015 | 1993 Geo Tracker

1 Answer

91chevy 5.0 l TBI won't spray any fuel out of injectors .can spray chemtool carb cleaner in throttle body and it starts up . have replaced distributor twice still no injector spray ?


could be clogged up, clean injectors. gunk in bottom of fuel tank can be sucked through and block injectors. also check fuel pump.

May 07, 2014 | Cars & Trucks

1 Answer

1991 chevy 454 7.4 wont idle, floods out after a few seconds,replaced everything from fuel pump to tbi presure reg,injectors.cap,rotor,wirers,coil. plugs.i am a member an pay every month to get the r


Have you actually checked the fuel pressure ? The return line could be blocked or one of the injectors could be shorted to ground.
The computer grounds the injectors to regulate "on" time. If one of the injectors is shorted to ground both will be open full no matter what the computer does. And the computer can cause the short.
You can check the circuits with a meter.
If the temp sensor had failed and was telling the computer it was 30 below zero you should get a check engine light. But it would cause the injectors to be very rich.

Aug 17, 2012 | Cars & Trucks

1 Answer

I have a 98 k1500 with 5.7 350 and it wont start, has spark and fuel at the tbi but the injectors wont fire, will run on ether if sprayed down the tbi any ideas


have the fuel pressure checked ,im assuming it is a vortec,
you need about 55 psi continusly to keep it running, i have a 96 2500 sierra. the fuel pumps were known to be terrable in these trucks. i put a new one in, then had to remove it to replace it again amonth later, they are flawed by manufacturing design.

Dec 16, 2009 | 1998 Chevrolet K1500

1 Answer

91 S10 2.5L TBI- no fuel spray, did I test this correctly?


put a full bottle of stp injector cleaner in half a tank of fuel and run it . use techron chevron fuel cleaner,
Vitally

Sep 10, 2009 | 1991 Chevrolet S-10

1 Answer

My 94 s-10 4.3 wont spray fuel?


you can purchase what is called a noid light not to expensive they plug into the injectors conection the noise your hearing is called a two second run . if the light don't come on the ignition modual needs replaced that is mounted under the distributor cap .

Aug 26, 2009 | 1994 Chevrolet S-10

1 Answer

I have a 98 chevy 2500 that wont start but cranks over


You will need to get up there Right above the Throttle Body and hold a Good Maglight or LED Flashlight above the TBI and have Someone Crank it Over. You will see the Spray inside the Bowls if it is Getting to the TBI.

Jan 24, 2009 | 2003 Chevrolet Cavalier

2 Answers

93 yukon 350 wont stay running at idle


when you crank the engine do you see fuel spraying from injectors .if you dont check for power at injector connectors one side should power and the other will be ground controlled from pcm.you can test with a 12 volt test for both. first test with test light grounded for power then test with test lead clip to battery to pos to the other wire from pcm while cranking engine light should flash.if it does turn key off again lean over tbi and have somone turn key on and listen for fuel circulating through tbi unit if you hear it without cranking engine replace fuel pressure regulator.

Dec 02, 2008 | 1998 Chevrolet K1500

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