fuel injectors not spraying?

Question

i have a 89 camaro the fuel injectors are not spraying gas checked fuse no luck sprayed starter fluid it ack like it wanted to crank but did not installed new fuel pump;fuel fillter,fuel pressure regulator,fuel pump relay help

Answer 1

some injecters have a pop off pressure which means that you fuelpump has to give it a certain amount of pressure before they will spray. on your fuel rail u have a valve that looks like a tire valve for the fuel this is where u need to test your pressure to see if your fuel pump is pumping at all and enough if it is pumping.

Answer 2

Change places with the bad injector and a good injector. You have to have a special tool to check the electricity to an injector because the electricity flows to the injector for such a short time. If the miss stays on the same cylinder, the problem will be with the wiring. On newer vehicles, if a spark plug is bad and not firing the computer will shut off fuel to that cylinder to keep from ruining the catalytic converter.

Answer 3

Sounds like your injector pulse from the ECM is not coming through.You should you've got spark??? If so you need a noid light to check for injection pulse. If no pulse could be any number of things from the ECM itself the a crank sensor to the oil pressure sensor even the map sensor can shut off the fuel Last the coolant sensor can short to ground causing no fuel had that twice.good luck hope I helped

GM tech for 20 years

Answer 4

Fuel is not your problem. otherwise, your car would run for few seconds after spraying starting fluid.
Make sure the CHECK ENGINE light comes on, when ignition turned to on position. if not, double check your fuses, especially the ECM fuse.
if CHECK ENG. light comes on and car wont run. most likely the problem is defective distributor pick-up coil (crank position sensor). which means no fuel injector signal and no spark condition.

Answer 5

Check the resistance on the injectors. Check the reading with factory spec, replace as needed. Do you get fuel at the rail? Clean the rail for any clogs and junk. Get a test light to see if the injector wires are sending a pulse to the injectors.

Answer 6

do you have fuel pressure? you really need to know this before you start throwing more parts at the car. if you do, get yourself a noid light. its a small test light that snaps into the injecter connecter that blinks every time the ecm fires the injecter. need one of those, too, or else you are just guessing and throwing more and more parts at the car. i would imagine that gets pretty costly after a bit. thats why i spend the $ on the right tools for the job. remember, the ecm supplies the ground for the injecters to fire it. it does not supply voltage. common misconception here. the injecter connecters are 'hot' with key on; see if you have 12volts at each injecter connecter, at 1 of the wires at each connecter. if not, then find out why. if you have 12volts, but no noid lite blink, ecm is either not firing the injecters or is not getting an engine rpm input to it to let it know to fire it. quit throwing parts at the car and diagnose it properly.

Answer 7

Check to see if you have fuel pressure.Switch on the ignition with the fuel line cracked open a little and see if anything comes out.If you have fuel your injectors are clogged.If they are clean or replace them.