We have a 2000 Blazer 4.3 V6...strange symptoms...first for about a
month my wife described a "stutter" on start-up intermittently, so I
thought fuel filter and/or water in the fuel...treated those
symptoms...the problem seemed to go away...then last Friday I drove
her truck to work, it ran great driving in to work, but when I came
out at the end of the day it cranked but didn't start. Like it was
either not getting fuel or fire. The next morning after leaving it at
work overnight it started right up. I didn't really notice if the fuel
pump was running Friday.
It has benn running fine since Saturday and then this morning in the
garage (thankfully) it wouldn't start again. I made note that the fuel
pump doesn't seem to be running. Before I jump in and buy a $300 pump,
drop the tank and replace it...has anyone got other ideas to check the
pump to see if it is bad or other issues it might be?
Any help would be fantstic!
It sounds like a fairly typical fuel pump failure, but without testing the
pressure in the fuel line, it's still just a guess. If you're not hearing
the pump - that's a very good indicator, and in fact one that many of us
would consider good enough. You do not need to buy the entire pump and
sending unit. You can buy the pump alone for a fraction of the price, and
simply replace the pump on your sender. Suggest you get some fuel injector
clamps to reattach the fuel line at the pump, rather than rely on the
Thanks for the replies...that is exactly what I plan to try! If I can
get it running Saturday I'm going to get the pressure tested.
Otherwise I'll just replace the pump...if I can't get just the motor
I'll just do the whole unit...it has 120K on it, so I'm do anyway!
Thanks again for the help!
There's actually two parts. Is it being turned on and is it turning on. If
turned on but it doesn't turn on, that implies the pump motor is bad. But
not being turned on, the problem is either 'back' before the pump (for
example, no power) but you have to know WHY it's not being turned on.
Divide and conquer. Before you buy a new pump, either manually
apply power to see if it will run, or 'splice in' a wire and hook it to a
voltmeter and watch it being turned on and off. If you see it being
turned on and off, and it doesn't work, then feel better about plunking
down the money to try a pump.
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