how do i know if my fuel pump is bad on a 08 dodge ram 1500
Jan 7, 2011 at 4:28 PM
truck wont start
2008 DODGE RAM
PATRICK111
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For a start, use a gage and check fuel pressure. Has the fuel filter been changed recently? The filter maybe part of fuel pump assembly, haven't looked, yet. Engine cranking, check voltage and ground for the pump motor at the rear. If good voltage and ground with no pump action, suspect the pump.
Do you have any driveability issues?
Do you have any driveability issues?
Jan 7, 2011 at 5:17 PM
fuel filter has not been changed, its part of the pump, a little rough idle occasionally, to check voltage do i need to pull the plug off the pump and check it there, unsure what you mean by "at the rear" i will have to go get a fuel pressure gauge. will take me a bit.
Jan 7, 2011 at 5:41 PM
Yes, check at the fuel pump connector. Intermittent issues can be a pain to track, You have to test when problem is ongoing. An intermittent rough idle, I don't that is your pump.
Jan 7, 2011 at 7:21 PM
i could not get the tester but i pulled the fuel line loose and tried it and no gas came out, i have about 10 volts at the pump. what do you think???
Jan 7, 2011 at 7:38 PM
it did start for a few seconds after i reconnected the fuel line and the plugged the pump back in, but nothing after that
Jan 7, 2011 at 7:49 PM
I was going to post a diagram. Orange wire is voltage, black is ground. I thought you had an intermittent idle? Are you saying the vehicle will not start? I got my wires crossed, somewhere?
Image (Click to enlarge)
Jan 7, 2011 at 7:50 PM
no it wont start at all, it had rough idle for a month or so before wed. thur morning it didnt start
Jan 7, 2011 at 8:05 PM
The orange wire with red tracer has voltage, when cranking. Check the black wire for ground. For ground that goes to chassis, you can use a test lite connected to battery voltage, touch the terminal for the black wire, if the lite comes on, the ground may be ok. If it doesn't come on, faulty ground.
Jan 7, 2011 at 8:09 PM
One black wire is for the sending unit, that isn't the one you want to check.
Jan 7, 2011 at 8:13 PM
lite came on
Jan 7, 2011 at 8:29 PM
both grounds good
Jan 7, 2011 at 8:33 PM
Usually you don't use a 12 volt lite to test ground that goes to computer. An LED should be safe for computer.
If the orange wire with red tracer has good voltage and ground is good, no clogged lines,connector is good, looks like the pump is faulty. I looked at Napa for that pump, 500 bucks, not including tax.
If the orange wire with red tracer has good voltage and ground is good, no clogged lines,connector is good, looks like the pump is faulty. I looked at Napa for that pump, 500 bucks, not including tax.
Jan 7, 2011 at 8:51 PM
that's about the same price i got. thank you for you're time
Jan 7, 2011 at 8:56 PM
Hope you got it going your way.
Mar 3, 2011 at 5:59 PM
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