Question about 1988 Chevrolet K1500
Replaced fuelpump getting fuel to throttlebody but injectors wont spray.
Posted by Anonymous on
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Posted on Jan 02, 2017
electronic engine control unit calculates the mass of fuel to inject, not how wide it sprays. It's the type of solenoid that you use. Some have wider spray nzzles than others. An external Fuel pump helps the delivery of the fuel. Also since fuel injectors rely on mass air flows nowadays, you have to have proper mixture coming through. hows your Fuel pressure regulator?
The throttle position sensor reports to the computer the position of the throttle butterfly valve, which the ECM uses to calculate the load upon the engine-but inorder for this to run, you may need an external pump.
Sounds like nothing is being grounded back to the ECM to even give a reading. If your regulator is improper and you do not have a external pump (depending on your model), than check those. If not, Start from scratch.
If you ever lose your way, go back to the beginning_REWIRE!
Posted on Feb 16, 2009
Best do a fuel pressure test. Should have chg. fuel filter from the get go. The only other filter is on the end of the fuel pump in tank. Bad gas and dirty gas will plug up fuel filter, hense burn pump up.
Posted on Apr 11, 2009
to be honest, with an 89, all you can do is replace the injector. how an injector works is there is a small amount of current that is run to a coil around a rod (if you are unaware, this produces magnetic fields). the magnetic field produced pulls up what is usually a small ball, allowing fuel to go through the tip of the injector nozzle. all you can do to fix this is to buy different injectors.
just a question..why do you think they are spraying too much fuel? because it may just be that you have excessive fuel pressure and your fuel pressure regulator is bad. hit me back.
Posted on Jan 02, 2010
Testimonial: "fuel pump regulator it keeps on flooding"
SOURCE: injectors s10 1991
So your saying fuel pump giving you pressure but ALL injectors are not firing. IF ALL INJECTORS ARE NOT FIRING AND FUEL PUMP IS A-OK THEN ECU IS THE PROBLEM.
However, if a few are not firing then its probably those injectors.
Posted on Jun 14, 2010
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