I recall there's a trick to forcing the electric fuel pump to run on these tucks, but I'm blanking on how to do it. Anyone remember? I'd look but don't have time to search for it on my phone

Tried starting up my truck the other day after like 4 months (I know, I know). Well the darn fuel pump decided it doesn't want to go anymore, whereas I used to hear it before starting the truck. It wanted to start with starter fluid so I guess my only issue is fuel delivery.

Thanks

 

Unhook the two wire plug that runs from the harness to the oil pressure sender. This fools the pump into thinking it’s grounded. The pump should now run with the ignition switch on the “on” position.

Edit: I’m talking factory in tank pump.

 

Sweet, thanks. OPS is somewhere near the oil filter, correct? I'll try it tomorrow morning and see if I can find it, not like there's much on the wiring harness in these old trucks, lol. Yes, factory in-tank pump

 

Yep. It’s a simple two wire plug. Mine rests about 1/2 way down the passenger inner fender. Should be able to trace it directly to the OPS.

 

Hmmmm....

I have a 1979 Celica that has an electric fuel pump. The OPS grounds a single wire. On my Celica, and I believe any carbureted car with factory electric fuel pumps, the pump will not run unless the engine is running (OPS switch) or the ignition is in the "START" position (OPS bypassed).

I guess an "easy" way to test the pump is to pull the fuel line off the carb and try starting the engine. Fuel should flow from the hose.

 

Mr. D is right. Modular plug, single wire, yellow with black or dark blue stripe.
Can’t depend on memory any longer.