Carbs and fuel pump relay, my solution |
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Carbs and fuel pump relay, my solution |
hcdmueller |
Feb 2 2009, 03:27 PM
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#1
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????????????? Group: Members Posts: 542 Joined: 4-February 06 From: UK Member No.: 5,527 Region Association: England |
I am running carbs on my 2056 so I performed the simple mod as described by SirAndy in the Tech Articles. One thing I have noticed with my car is that my fuel pump runs continuously with the key switched on. The fuel pump is a rotary one that I bought from the Type4Store.
I didn't like that fact that my pump kept running so I took matters into my own hands. I modified a Bosch CIS fuel pump relay to work with my car. It needs a signal from the negative side of the coil to provide power to the fuel pump. So unless the engine is cranking or running it won't start up the pump. Nice to have the extra safety margin as well. The relays are easy to find in the junk yard. I only paid a couple dollars for 3 of them. Attached image(s) |
shane |
Sep 29 2019, 02:46 PM
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#2
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Member Group: Members Posts: 355 Joined: 12-February 13 Member No.: 15,518 Region Association: None |
I had the carter oil pressure safety switch in place of the standard oil pressure switch. It allows the fuel pump to run whenever the starter is cranking, And you keep your oil light function also. But mine stopped working I’m pretty sure it had something to do with having the engine upside down on a engine stand for about a year or so. But it seems like a good way to go, so I just replaced it with a standard oil pressure switch and used a relay to operate the pump when there’s oil pressure and another relay to operate the pump when the engines being cranked to start. I also added a medium loud buzzer when the key is on but the cars not running so I don’t forget and leave the key on when I’m working on the car.
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