I have a 86 350 4×4 fourtrax. I have gotten most everything done and going on it again. I replaced the fuel pump and it started right up. Drove it for a little bit, then it wouldn’t start. I had bought an aftermarket fuel pump and when I tested it directly to a good battery it would not click, so assumed it burnt out. I bought another one and had similar results. Started right up and ran fine. Shut it off and would not start, again the fuel pump appears to went bad.
I am thinking the voltage regulator box might be bad, letting too much voltage to the pump when the rpm’s increase. I hate to by another pump just to burn it up. Without it, I can not start it to test the voltage coming to the pump. So I guess I will have to buy one anyways to do this check. I am assuming I should see a consistent 12VDC to the pump, no matter what the RPMs are?
I was also reading about possibly just putting in a vacuum pump instead. I think someone wrote a 1980 Mazda fuel pump is a vacuum pump that fits right in the same bracket.
Thanks for any assistance/guidance.