Quote:
Originally Posted by GMCjet52
Ok, I think we're getting closer. My previous assumptions were wrong, here are the facts:
-It has good spark. (checked with a spark tester)
-The fuel pump relay is clicking on and off when the key is cycled.
-I cannot hear the fuel pump running at all.
-It will start up with carb cleaner sprayed into throttle body, as soon as I stop spraying it dies. (The last time I tried I wasn't using enough carb cleaner)
-No CEL/SES light with the key in the on position. (maybe the light is burnt out)
-No fuel pressure at rail valve.
-All fuses checked good
I suppose I need to check for power at the fuel pump plug.
I have a funny feeling all this points to the fuel pump...  |
yes follow what i said before what u have not already tried.if there is no check engine light in the run position then that could mean dead computer.or no power to the computer. but if it will run off of carb cleaner and u cant here the fuel pump then the computer could be in limp/default mode which is puzzeling because the fuel pump should still run. yes check power to the fuel pump or first try taking out the fuel pump relay and jumping it with a hot wire tie a wire to the battery.becarefull at least on of the prongs will be a ground. just touch the wire to the prongs one at a time.listen for the fuel pump to run.this is putting juice straight to the pump.you should know which prong is the ground it will spark pretty good. stay away from that one.touch the other ones and u should see or hear a light spark that will be the pump running prong. touch that one several times hold for a 2-3 seconds several times.if u cant hear the pump check the fule rail for pressure. if u have pressure then have someone try to crank it while you power the fule pump. try taht. and see and listen and get back with us. i hope this is helping.i am much better at diagnoising when i can actually put my hands on the vehical.good luck!