Ok i have a gsr that i recently built with a new .20 pistons and rods,balanced crank , new oil pump , new water pump. I primed the engine a couple of times and the put the spark plugs and fuel pump connector back on. It turned over about 3 times, didnt fire, then it just stopped. The fuel pump wont come on and the starter wont activate. So i got a brand new battery, tested the starter, got a new main relay and still nothing happens. I was reading in my manuel about if the the motor goes under 4.3 psi of oil pressure the fuel pump wont turn on? But i have no idea what is goin on, any help would be greatly appreciated....Thanks

 

oil pressure sender is most definately not wired to the fuel pump.

It won't turn over at all? Not even a click?

 

Nope nothin at alll, no buzz from the fuel pump , i have headlights and interior lights thats it .

 

Hmm... check fuses + grounds I guess.

 

Thats all been done, its just weird it was doing it then just stopped..Thats why i thought it was the main relay, but it wasnt

 

Hmm try manually tripping the starter solenoid by jumping it to the battery... heh.

 

already did that with a screwdriver, and a wire....nothing happened though , advanced auto did it when i took it out and it Worked! WTF

 

Engine bay ground wires are hooked up?

 

yeh , im gonna sand them all down.......but that wouldnt have to deal with the fuel pump not turning on would it ?

 

Bump for some answers

 

Is the ECU plugged in...? does it have power? does the main relay click?

 

ecu is plugged in , main relay does not click ...not sure if the ecu is gettin power or not

 

this might be a dumb question but there are 3 wires connected to the starter right? Power, ground and a signal wire?

 

No.. +12v constant and starter solenoid... no ground. It gets ground through the engine.

 

i would take a socket and breaker bar and try turning the crank over by hand

 

ok thats what i thought , my friend was arguing with me

 

already turned the motor over by hand many times

 

for the fuel pump check all connections but shouldnt make it so engine wont turn over it just wont start

 

i used a jumper wire in the main relay harness to turn the fuel pump on...it turns on then, but the main relay is good so i dont know whats goin on

 

interesting... just signing up, anything usefull comes to mind I'll let you know. good luck!

 

it sounds like ypour ecu?

 

thats what me and john are talkin about at the moment , but it should have nothing to do with the starter

 

i dont see how the main relay can be good and when i jump the fuel pump it works , it still seems like the relay is not doing its job, but when i hooked it up to my batt it worked fine

 

no ecu codes? I had a bad ecu which didn't kick the fuel pump on. i had a solid code on my ecu, no flashes. put in a ecu from another car and it fired right up. didn't have any problems with starter though, maybe there's a starter fuse or relay or connection bad

 

oh yeah I saw a thread about people blowing some voltage regulater in the ECU, which prevents the fuel pump to turn on... you should check that out at least, open the ecu...

now that I think of it, not sure if it was a capacitor that burns out instead, I'll try to find the thread.