The motor came out of 86 Linclon, same 302 motor but the intake had to be changed. The origonal motor in the truck was also 302. It was running until the motor swap. I checked the fuel pump relay plug-in wires for juice, and only 1 wire has power. It is the wire going to the coil. Another mechanic told me that there was suppose to be 2 hot wires going to the fuel pump relay. He said it was suppose to have hot wires on the points side, and the coil side on the relay. The hot that is going to the relay is going to the points terminal on the relay. I checked all of the wires on the relay and where they were going and this is how the wires go-- 1 red wire comes from the computer, 1 striped wire goes to the fuel cut off switch, 1 striped wire goes to a switch beside the battery, which I think is a timer, and 1 striped wire goes to a plug-in on the fender welll that splits and goes to the fuel pump on the frame, and the other wire in the plug in that splits off, that wire goes to the tank switck on the dash.
The truch has the computer from the origonal motor.
What gets me is, that if I straight wire the fuel pump the gas is getting to the injectors but the truck won't fire. But I sprayed a shot of eather in the intake, and it fired. It just don't make any sense unless both fule pumps have to be running before there is enough pressure to get through the injectors. Is there any way I can rig the truck to run without fixing it back oragional? Thanks for any help
Saturday, May 29th, 2021 AT 11:35 AM