Hi All,
I installed a kill switch 10 years ago, which interrupts the 12V+ to my fuel pump relay. When I get in the truck, I crank the engine a couple times to circulate the oil. Then, I flip the kill switch to provide power to the fuel pump relay. It starts up fine every time.
This past weekend, I was out on the trail and the truck wouldn't start. I bypassed the fuel pump relay by connecting a wire from the #3 terminal in the plug that goes into the fuel pump relay, and heard fuel pumping as normal. It looked to me like there was excessive dialectic grease in the connector, so I wiped and blew it out. Then the truck started fine.
About 6 or 7 years ago, a similar thing happened and I had to replace the fuel pump relay to get the truck working again. I'm that instance, the fuel pump relay bench tested fine per the FSM. I concluded it was failing intermittently because after I replaced it the problem never recurred.
So, could my kill switch be killing my fuel pump relay? The truck only has 35K miles on it since I replaced that part, and it seems highly unusual that it would fail again so soon.
The truck has started normally six times in a row now since I got it started on the trail over the weekend.
Thoughts?
I installed a kill switch 10 years ago, which interrupts the 12V+ to my fuel pump relay. When I get in the truck, I crank the engine a couple times to circulate the oil. Then, I flip the kill switch to provide power to the fuel pump relay. It starts up fine every time.
This past weekend, I was out on the trail and the truck wouldn't start. I bypassed the fuel pump relay by connecting a wire from the #3 terminal in the plug that goes into the fuel pump relay, and heard fuel pumping as normal. It looked to me like there was excessive dialectic grease in the connector, so I wiped and blew it out. Then the truck started fine.
About 6 or 7 years ago, a similar thing happened and I had to replace the fuel pump relay to get the truck working again. I'm that instance, the fuel pump relay bench tested fine per the FSM. I concluded it was failing intermittently because after I replaced it the problem never recurred.
So, could my kill switch be killing my fuel pump relay? The truck only has 35K miles on it since I replaced that part, and it seems highly unusual that it would fail again so soon.
The truck has started normally six times in a row now since I got it started on the trail over the weekend.
Thoughts?