Replaced Fuel pump and still nothing!!!! WTF
11-28-2005, 06:41 PM
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Replaced Fuel pump and still nothing!!!! WTF
Today I replaced the inline fuel pump on my volvo 780 becuase the other one crapped out on me. When I take the fuel line off of the pump gas spews everywhere. When I hook it up to the pump and hit the key i get nothing. What is it you guys. I have not a clue.
11-28-2005, 08:30 PM
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Re: Replaced Fuel pump and still nothing!!!! WTF
Originally Posted by Dick
check for voltage at the pump maybe fuel pump relay or fuse does the engine have spark ?when cranking
im trying to replace the relay tommorrw. if that doesnt work who knows.
11-28-2005, 11:03 PM
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Re: Replaced Fuel pump and still nothing!!!! WTF
Why don't you see what's working instead of just blindly replacing stuff? Grab a multimeter and start checking stuff. A relay is the easiest thing in the world to check, either it works or it doesn't.
11-28-2005, 11:13 PM
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Re: Replaced Fuel pump and still nothing!!!! WTF
It's a relay. Grab a multimeter and start testing.
There are only two things you have to check to either rule it out or decide it's bad. (I know there's three things, the first two tell you about the third, so no smart ass shit..)
1) Is the relay getting power? It obviously can't switch power it doesn't have.
a) Yes- Move to number 2.
b) No-find out why there is no power
2) Is the relay coil getting a switch signal?
a) Yes- Move to number 3.
b) No- Find out why there is no signal.
3) Is there power on the output of the relay when it switches?
a) Yes - I have no idea why your fuel pump doesn't work.
b) No- Your relay is most likely bad. Replace it.
There are only two things you have to check to either rule it out or decide it's bad. (I know there's three things, the first two tell you about the third, so no smart ass shit..)
1) Is the relay getting power? It obviously can't switch power it doesn't have.
a) Yes- Move to number 2.
b) No-find out why there is no power
2) Is the relay coil getting a switch signal?
a) Yes- Move to number 3.
b) No- Find out why there is no signal.
3) Is there power on the output of the relay when it switches?
a) Yes - I have no idea why your fuel pump doesn't work.
b) No- Your relay is most likely bad. Replace it.
11-29-2005, 02:12 AM
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Re: Replaced Fuel pump and still nothing!!!! WTF
Originally Posted by Fabrik8
It's a relay. Grab a multimeter and start testing.
There are only two things you have to check to either rule it out or decide it's bad. (I know there's three things, the first two tell you about the third, so no smart ass shit..)
1) Is the relay getting power? It obviously can't switch power it doesn't have.
a) Yes- Move to number 2.
b) No-find out why there is no power
2) Is the relay coil getting a switch signal?
a) Yes- Move to number 3.
b) No- Find out why there is no signal.
3) Is there power on the output of the relay when it switches?
a) Yes - I have no idea why your fuel pump doesn't work.
b) No- Your relay is most likely bad. Replace it.
There are only two things you have to check to either rule it out or decide it's bad. (I know there's three things, the first two tell you about the third, so no smart ass shit..)
1) Is the relay getting power? It obviously can't switch power it doesn't have.
a) Yes- Move to number 2.
b) No-find out why there is no power
2) Is the relay coil getting a switch signal?
a) Yes- Move to number 3.
b) No- Find out why there is no signal.
3) Is there power on the output of the relay when it switches?
a) Yes - I have no idea why your fuel pump doesn't work.
b) No- Your relay is most likely bad. Replace it.
11-29-2005, 05:47 PM
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Re: Replaced Fuel pump and still nothing!!!! WTF
Originally Posted by Fabrik8
So where along the line is the problem? Is the relay getting power, but the pump isn't?
When the key is turned to the on position, the pump doesnt prime. But when you crank the motor the pump vibrates it ass off. At the same time, no fuel is coming out of the pump.
11-29-2005, 09:57 PM
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Re: Replaced Fuel pump and still nothing!!!! WTF
So is the pump getting power through the relay..?
You still haven't said where the power stops. You seem to be guessing, not actually checking stuff. You could be done by now if you'd start troubleshooting and figure out what has power and what doesn't.
You still haven't said where the power stops. You seem to be guessing, not actually checking stuff. You could be done by now if you'd start troubleshooting and figure out what has power and what doesn't.
Last edited by Fabrik8; 11-29-2005 at 10:01 PM.