electric fuel pump?
recently my mech. pump went a friend of mine wired in an electric pump he had on hand. couple of questions . . . . is this "better" than a mech. pump, should i get a block off plate if i keep the electric? and a question about the wiring....... is the pump suppose to run continuously while the key is in the on position? like if i wanted to listen to the radio without truck running .... and also if the key was turned to the left for just the radio , should it be running then ??? b/c mine runs all the time? is it always pumping gas into the carb for as long as i have the key turned ? is this correct? should i just go back to mech? i know alot of ???? any help thanks a lot!!!!! by the way its a 79 350 4wd with a 400. edelbrock carb and intake .
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Originally Posted by XTfx4
(Post 13224426)
recently my mech. pump went a friend of mine wired in an electric pump he had on hand.
Originally Posted by XTfx4
(Post 13224426)
is the pump suppose to run continuously while the key is in the on position?
Originally Posted by XTfx4
(Post 13224426)
like if i wanted to listen to the radio without truck running .... and also if the key was turned to the left for just the radio , should it be running then ??? b/c mine runs all the time?
Originally Posted by XTfx4
(Post 13224426)
is it always pumping gas into the carb for as long as i have the key turned ? is this correct?
Originally Posted by XTfx4
(Post 13224426)
should i just go back to mech?
Next time, please slow down and use a little more punctuation and fewer abbreviations. Your post looks like a text message and is very hard to read. |
Personally I would put a new mechanical fuel pump back on.
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On a carb vehicle I think of the electric pump as a "problem solver". Vapor lock problems in hot weather? The electric pump will help. Really long cranking on an engine that has sat for a while? Electric pump will help. I run an auxiliary electric on another brand 40's era PU with chronic vapor lock problems in hot weather. Problem solved.
My dent is happy with its mechanical pump. Once I got the soggy fuel lines replaced, no fuel problems including 100 degree temps. I think the mechanical pump is best. Its simple, low cost and inherently "safe" since it stops pumping when the engine stops. I'd put a mechanical pump back on personally. |
My dent is the first vehicle I've ever had that didn't have an aux electric pump added. I ran into my first problem when I ran out of gas and couldn't get the mechanical pump to prime....
I'm now considering piggy-backing an electric one on there to help with this situation and to make starts easier. |
Originally Posted by MeanGreen460
(Post 13224618)
Personally I would put a new mechanical fuel pump back on.
X2, the mechanical pump will never let you down. the last one lasted 30 plus years? chris |
One of my trucks has an electric pump installed by the PO. I'm not sure why. Anyway, it was installed to operate in Run but of course was still a problem. It pumped fuel when the ignition was in run and the engine not running (such as during a stall). Even worse, it could also keep pumping fuel during a ditch or a roll and then you've got fuel going everywhere. I installed an oil switch relay I orderer from Jegs so the pump only runs when the engine is running. Do yourself and your passengers a favour and do the same if you are going electric, or go back to mechanical.
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