Car wont start? Fuel pump does't give fuel.

[Batz]

Alright, so i took my m20 apart to rebuild it a bit, change gaskets and etc.. to make it a bit more reliable. So after i put everything back together the car wont start. It gets spark and everything but no fuel. The fuel relay is fine, the fuse is fine(put new one in) the pump works fine as well, if connected straight to the battery, but when properly connected to the car it does not.. Anyone any ideas? What can cause this problem? I srsly dont know whats wrong, especially the fact that it was running before i took it apart like a month ago throws me off.. Thanks

[Quadrajet]

M20b25 or b27? Not sure to what extent you took it apart...

If it's the b25, is the Crank position sensor plugged in? First thought that popped into my mind.

If it's a b27, perhaps the reference sensor then? Depends on year.

[Batz]

All sensors are fine, checked them. and i believe that if it was the sensor i wouldn't be getting spark, would i? At least thats what i read somewhere. And by "apart" i mean just changed timing belts, clutch, and bunch of gaskets. Didnt even took the head off. Its a b27.

Sent from my HTC VLE_U using Tapatalk 4

[jlevie]

If the pump works when directly powered but doesn't when controlled by the relay, the fault has to be between the pump and the DME or that the DME isn't seeing timing data from a rotating engine. Having spark when cranking eliminates the later as a possibility since the DME has to have timing data to produce spark.

Pull the fuel pump relay and jumper the power input and output pins with the ignition on. If the pump then runs the fault is within the relay or between the relay and the DME. If the pump doesn't run, check for power to the relay socket. If there is power there the fuse is bad or there is a wiring fault between the relay and the pump or a bad pump ground.

[Batz]

It was the ECU, thanks all!