The car: 1986 GN
Casper's hotwire kit, new fuel pump ( old one too weak), new hanger (old and sender was fubar) , new fuel tank (old one leaked) , new relay (thought that would have cured the issue).
There is an intermittant condition where the fuel pump will not activate on start up. As a example, drove the car on a trip yesterday. Drove 120 miles to a business meeting the car ran flawless. At end of the day, drove another 50 miles and stopped to get gas. After filling up, the car wouldn't fire as the fuel pump wouldn't activate. I messed with the connections at the harness going to the tank to no avail. Opened the hood and connected the hot wire from the underhood lamp to the fuel pump test connection behind the alternator and it fired up. I left it hooked up and drove the rest of the way home. I pulled into the driveway, left the car running and disconnected the jumper expecting the pump to stop and it didn't. I used the key to shut it off.
This isn't the first time it's done this, it's really starting to piss me off. Oil pressure shows fine, there doesn't seem to be any pattern to this. Sometimes it operates perfectly, other times it doesn't. Doesn't seem to matter whether it's a cold or hot start. Ironically, once started it will never cut off while in operation. Fuel pressure and volume are fine, the performance is just great. It's the non priming issue that's getting to me.
Any thoughts on where to check?
Casper's hotwire kit, new fuel pump ( old one too weak), new hanger (old and sender was fubar) , new fuel tank (old one leaked) , new relay (thought that would have cured the issue).
There is an intermittant condition where the fuel pump will not activate on start up. As a example, drove the car on a trip yesterday. Drove 120 miles to a business meeting the car ran flawless. At end of the day, drove another 50 miles and stopped to get gas. After filling up, the car wouldn't fire as the fuel pump wouldn't activate. I messed with the connections at the harness going to the tank to no avail. Opened the hood and connected the hot wire from the underhood lamp to the fuel pump test connection behind the alternator and it fired up. I left it hooked up and drove the rest of the way home. I pulled into the driveway, left the car running and disconnected the jumper expecting the pump to stop and it didn't. I used the key to shut it off.
This isn't the first time it's done this, it's really starting to piss me off. Oil pressure shows fine, there doesn't seem to be any pattern to this. Sometimes it operates perfectly, other times it doesn't. Doesn't seem to matter whether it's a cold or hot start. Ironically, once started it will never cut off while in operation. Fuel pressure and volume are fine, the performance is just great. It's the non priming issue that's getting to me.
Any thoughts on where to check?