87 grand am 2.5 le....it seems this car wont run

[Jarrado]

Ok, so the car wont start. It ran real good for about 500 miles(this a rebuilt engine we did ourselves), then started to act very strange. It would die randomly...mainly at high speeds or when hot. just 3 days ago were cruisin and it dies...no problem we just start it back up... but then it starts running super rough and dies permenantly... so we have to tow it. We cant figure out why it wont start or rather why it wont spray any fuel. we take off the throttle body and its full of some kind of rust or dirt or somthin... we think it was old gas... car sat for 6 years. So we cleaned it out it ,still wont start...injector wont spray...replace it still wont. We make sure we have spark we do-we already replaced coil packs...hmm...ECM is next..replace still wont work. at this point i feel frustrated because i dont know very much about cars and the fact that just before the car stopped it got a clean test at the dealer. these are the things we have already replaced: fuel filter,throttle, idle air sensors, spark pluggs, ecm, crankshaft pos.sensor, thermostat, water pump, a/c system, fuel pump, rebuilt throttle body, battery, i may have forgot some ill edit them in. SO if ANYONE has any ideas as to what could be causing this car to NOT work I would be very very happy...

[Jarrado]

I really need some help, if your trying to figure something out thank you. But i have no other transportation... so anything you can think of would really be appreciated.

[maxwedge]

Originally Posted by Jarrado

I really need some help, if your trying to figure something out thank you. But i have no other transportation... so anything you can think of would really be appreciated.

Get a noid lite and check for pulse at the injector connector, if none check for bad injector fuse. See if it will run briefly by squirting carb cleaner into the intake. Post back results of these tests.

[Jarrado]

We already checked all the fuses... they're good. And the car will run if gas gets in the throttle body. I dont know what a noid light is though. we have gas and spark but no spray. could it be a malfunction in ignition coils or crakshaft pos. sensor??

[maxwedge]

Originally Posted by Jarrado

We already checked all the fuses... they're good. And the car will run if gas gets in the throttle body. I dont know what a noid light is though. we have gas and spark but no spray. could it be a malfunction in ignition coils or crakshaft pos. sensor??

A noid lite plugs into the injector harness and checks if the pcm is triggering the injector, they can be bought for about 20.00 at most parts houses. If you have 12v to the plus side of the injector and no pulse suspect ign module or pcm/wiring problems.