j9fd3s

nope. the ecu will fore the injectors if it has power and an rpm signal

sidewinderx7

damn this problem is ******* with me! Ok, i unhooked the wiring harness again. Gonna reconnect everything up. I still dont get why the car wouldnt atleast start, if i jump the fuel pump and turn the car over. Obviously the injectors arent firing, correct? I havent tested them with an injector tester yet.



im usually good with this stuff, but damn.. this one is making me go insane! everything is working but the damn fuel system. Ive read the entire fuel section in the service manual, and the entire electrical section too! To see what relates to what. And still ... cant find thise problem. Im thinking its something really really easy too

sidewinderx7

im about to cry



ive been out there all day trying to figure it out.. redid hooked up the harness, checked the ecu to see if it was all plugged in right, etc.. and i cant find it. had ANYONE had a problem like this? everything works fun except the ******* fuel. Im going insane! good god

turborotor

Have you tried a different ECU. Did you just do a new engine swap or what were you doing ot the car that made it do this?



C

sidewinderx7

the last engine blew. Everything electrical was working top notch when i took out the old engine. It is the same s5 13bt engine that is in now. Everything hooks up perfect. Havent tried a different ecu because (1) i dont have an extra t2 s5 ecu and (2) i dont think anything is wrong with it. Everything else electrical works.



im going to my buddys shop to pick up his injector tester, so hopefully i can see whats going on with the injectors. There isnt much to the fuel system. Only 2 relays!



ok quick question. If the jumpper wire is in the test connector for the fuel pump, will the injectors fire?



perhaps the injectors wont fire unless the circuit relay is activated? Since the jumpper bypasses the whole relay, that would explain the injector problem. Then i would be back to square one with just the fuel pump problem. Possibly?



i appreciate the help, sorry if i seem all moddy and pissed off, ive been at it for 3 days and ive never had a problem so difficult (yet probably so easy of a solution).

RONIN FC

My 87 TII did that. it only ran on either/starter fluid but i had fuel, spark, comp, air. The part of the ecu that controlled there injectors was shot. I got the car like that so i don't know what hapened.



Have you welded anything on the body or anything?

turborotor

Only the fuel pump will turn on when you jump the test connector.



A few questions, does the tach jump when starting the engine??

sidewinderx7

nope havent welded anything on. I just did an injector pulse test and i have no power to the injectors.



So, no power to the injectors, and no power to the fuel pump. Everything else, has power.



Any ideas of what might be causing this? Not the ecu.



yup, tach jumps, so im getting rpm signals. And yes, the fuel pump is what turns on when i jump the connector. I tried to check to see if any codes would come up and got nothing. Im pretty boggled as to what exactly is causing it.



There has got to be a short, or ground somewhere, and i need to find out what runs both the pump and injectors that may have gone bad.

sidewinderx7

if the afm isnt getting a signal, would that cute power to the pump and injectors?

TheCamel

Have you done a resistance check on the fuses? sounds like you have a bad fuse or ground at this point