98 gs turns over but wont crank up injectors not sprayin

[bonestocker]

i just got the car its only got 57k miles i've replace the pump and filter and the fuel pump relay its getting fuel to the rail but i dont think the injectors r sprayin i can spray staterfuild in the thing and it fires up for just a min can anyonehelp me out i'm lost

any help?

????

 

[jdavisawd]

If you have a noid light you can check ## harness and see if you getting signal to the connectors. Is the fuel pump priming when u turn the key? Usually you can hear it turn on. Some fuel rails have a check valve on them. See if your getting fuel to the injectors first.

 

[luv2rallye]

FP only turns on while getting CAS pulses (engine spinning). Also need CAS pulses for injectors (and good ECU).

 

[bonestocker]

yes fuel pump is coming on and i can relieve the pressure on the rail and it squirts out fuel

no body?

 

[jdm1990]

You need to check and make sure your actually getting a signal to your injectors. You also may wanna trace your injector wires and make sure there no burn marks, lose ground, ect.

 

[luv2rallye]

FP only turns on while getting CAS pulses (engine spinning).

Sorry I didn't notice you have a NT which turns FP on with key on.

Make sure you have CAS pulses which are needed by ECU to drive injectors. First test its ECU supply voltages by unpluging CAS connector, key to on, and measuring on the connector harness side. Blue-red wire should be in range 4.8-5.2V., yellow in range 8.5-9.5V, black-green should have continuity to ground. Then reconnect connector and measure the blue-red while cranking. There is no spec on this but it should be less than (but not 0) the previous blue-red measurement.

 

[Tyeler18]

Lots of people over look this (me included)- fuel pressure. I diagnosed my no-start for 2 weeks and ignored everyone who told me to check fuel pressure because I had pressure up to the rail also, however, not nearly enough. Since you just installed your fuel pump did you install it correctly? Mine ended up being the retainer cap/oring/spacer weren't on the fuel pump (previous owner didn't know he needed them) so it would get fuel to the rail, but not enough.

 

[bonestocker]

the car is now running got the injectors to spary took a bit had alil bad gas cloggin them up

 

[jdm1990]

the car is now running got the injectors to spary took a bit had alil bad gas cloggin them up

May wanna pull your fuel pump and try to check your gas tank out. I know in my 96 I was having a similar issue. Turned out the bottom of my gas tank was rusting to hell. Just a sugestion.