Question about 1991 Chevrolet S-10

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

91 S10 2.5L TBI
There is 12V between the two injector wires, but no fuel spray- did I test this correctly? I've replaced the pressure regulator, the fuel pump and all the gaskets in the TBI. All these needed to be done, so no regrets, but I don't want to spend $ to replace a part I don't need. Also replaced the plugs, wires, cap and rotor- also nessessary, just background info.
I JUST bought this truck, guy who had it claimed it ran before, just not very well. I'm beginning to get the feeling it didn't run at all...

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  • CoryRay Sep 10, 2009

    Almost forgot, it's an "E" VIN, 5-speed manual tranny, no power ANYTHING, hole in the dash where a radio should be, etc. etc. etc.

  • CoryRay Sep 10, 2009

    Thanks, Vitally, but I can't get it to start- if I pour a shot of gas down the throat, it sputters/starts, then dies- no fuel from the injector...

  • Adam Schultz Aug 27, 2013

    CoryRay, did you ever resolve this problem? Having the same issue with my 1991 S10, 4.3 liter V6. No fuel dispersing into TBI. Replaced filter, pump working, gas in tank. Any suggestions would be greatly appreciated.

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

Posted on Sep 10, 2009

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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:
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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 ?
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unplug the injector connector (4pin plug)
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both engines covered here.
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