Question about 1989 Chevrolet S-10 Blazer

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Truck won't start. Fuel to throttle body ok, little sprinkle coming out of injectors not consistant. One crank slight spray next crank nothing but a dribble.

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  • Chevrolet Master
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Either no fuel pressure or the favourite is the non return valve on the fuel rail ,it has a vacumn pipe running to it ,this pipe cracks and splits so no vacumn to the valve give symptoms you describe

Posted on Jan 03, 2011

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1 Answer

Acceleration problem


Could be a clogged fuel filter, could also be a slight crack in the throttle body gasket. get a spray bottle with water in it, set it to mist, while the vehicle idles, spray around the base of the throttle body, if it bogs down replace the throttle body gasket. Just curious, was it doing it before you changed the plugs and wires? If not make sure you have the firing order correct.

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My truck sat up for probably 3 or 4 years cranked and run fine yesterday but today it wont crank at all any ideas?


If it won't crank over, it's not a fuel issue, but a starting circuit issue. The gas may be stale, but if tank was full all that time, I don't think that would be a problem.
Pull off the small wire on the starter solenoid, and see if it has power when key is held in crank position. If power there, the starter or solenoid or the battery connections from battery to starter need to be checked or tested. If no power to solenoid when key is in cranking position, the ignition switch may be bad or the neutral safety switch (or the clutch start switch if a manual) or the starter relay needs to be checked.
If you get it cranking, and still no start, look down the throttle body bore and watch your injector spray pattern while the engine is cranking-you should see a fine, cone spray pattern coming from the bottom of the injector. If it just drips and no cone pattern, or no gas coming out, injectors need cleaning (probably from stale gas). Good luck.

Oct 23, 2012 | Cars & Trucks

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Open the fuel line slightly where it goes into the injector pump and bleed it there, then tighten it. Open the nuts that secure the injector lines to the injectors slightly- very little- and crank it and watch for bubbles at these fittings. Sometimes holding the throttle pedal to the floor will help. You want to get the fittings loose enough to let air under pressure out, but not let outside air in.

When the bubbles have cleared out at the injectors and you start seeing solid spurts of fuel, tighten them and the motor should start easily.

lp

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I think you may be on the right track with the fuel pump idea. Check your fuel pressure - it could be the pump or just the fiter screen in the tank. You don.t say what kind or year of truck you have - I am guessing the pump is in the tank. (Although you do mention a throttle body / fuel injector)

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Good Evening, you might want to check those injectors, I can not remember for certain but that setup was sequential and when one or two have a problem it would take out the rest. Ohm out the injectors and see what you have there.

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I installed new fuel pump and truck will idel for about 15 second


check to see if the injectors are working, what engine do you have? and what kind of fuel pressure are you getting? check fuses for the injector circuit, if your fuel pump is working and you know your spark is good, the next thing to check would be the injector system

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