Fuel Delivery Problem, No Fuel to Fuel Rail (cross post) Options

[AvalonFal]

This is a cross post to multiple sites.

'74 2.0L with stock d-jet. Just installed a new (at least that's how it was advertised) original type 3 port fuel pump in the original rear location and now car won't start. Pump comes on, engine cranks very strong, but no start. There is good fuel flow to the pump, but no fuel to the passenger fuel rail. It seems that all the fuel is going to the return line back to the tank.

Any thoughts??

Paul

[Cap'n Krusty]

I think you're on the right track, Dave. The Chinese pumps are reported to have significant QC issues. While I'm here, I noted in the picture a DEFINITELY substandard non-FI rated fuel filter and the lack of the stepped hose. I can follow up with the correct PN later.

The Cap'n

[AvalonFal]

OK, here's the result.

Apparently the 3 port pump sold to me from down south is an aftermarket pump. The problem with the ports not being ID'd is that the ports are DIFFERENT on this pump than the original configuration. On the original pump, the center port is the "pressure" port (to the engine) and the port at the silver cap end is the relief valve back to the return lines. NOT SO WITH THE AFTERMARKET PUMP. Those ports seemed to be reversed. The center port is the relief port and the port near the silver cap is the pressure port to the fuel rail. I switched the hose connections and the car started right up on the 1st try after sitting unstarted since before Xmas!! I left it running for a good 1/2 hour and everything seemed OK, except for a small drip at the pump (I'll have to make sure everything is tightened).

I guess that explains why all the fuel was pumping through the return line to the tank with the original connections. Who knew??? Does this sound OK to use the pump as is??

Has anybody else used these aftermarket pumps??

AA, did you know this???

Paul