V10 Excursion starting problem

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Nov 26, 2013 | 10:09 PM

Doug Manley

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V10 Excursion starting problem

V10 Excursion starting problem
<hr style="color:#D1D1E1; background-color:#D1D1E1" size="1"> <hr style="color:#D1D1E1; background-color:#D1D1E1" size="1"> I've been having a problem with starting the truck for a while but it seems to be getting worse.Some times I can turn the key on to start it and it starts right up. Other times I have to turn the key on and off multiple times to get the fuel pump to come on then it starts.Some times it starts and runs rough and dies,but once it does start it runs fine no problem.It was doing it some last year and I changed the fuel filter but no difference.I don't know if it's the fuel pump,some kind of module or wiring.Any ideas.Parts are so extensive and pulling the tank is a drag so I'd like to figure it out and fix it once.Thanks,Doug

Nov 26, 2013 | 10:29 PM

Limoguy

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Joined: Jun 2008

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From: fort worth

Check batt. cables and charging output. have Alt professionally checked

Nov 26, 2013 | 10:43 PM

Doug Manley

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Truck turns over fine but the fuel pump doesn't always come on.Saturday my son and I tried for at least a 1/2 hour turning the key on and off but no fuel pump noise .Today he was out and tried starting it and it fired right up.Drove it to my garage shut it off and then restarted it twice -no problem.And it runs fine once it starts.Seems like a bad connection some where.Doug

Nov 26, 2013 | 10:53 PM

EXv10

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From: Mt. Shasta California

Sounds like a bad fuel pump to me. How are determining the fuel pump is coming on?

Nov 27, 2013 | 01:38 AM

Doug Manley

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When the truck will start you can hear the fuel pump make a hum type noise when you first turn the key .When it doesn't start you get no fuel pump noise.If when it doesn't start you turn the key on and off a few times till you hear the fuel pump, it starts.When it starts it drives fine.Seems if the pump is bad the truck wouldn't run at all.

Nov 27, 2013 | 06:27 AM

tdappleman

Fleet Mechanic

Joined: Sep 2002

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From: Greensboro, NC

Classic symptoms of a fuel pump on the way out. Intermittent functionality and then it will eventually quit completely and leave you on the side of the road. When you replace the pump you will want to check all of the wiring as well. Some pumps come with new connectors to ensure they aren't causing additional resistance. If it eventually fails you can try smacking the bottom of the fuel tank with a mallet and it may work one or two more times.

Nov 27, 2013 | 11:43 AM

EXv10

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From: Mt. Shasta California

I agree, change it now before you have to have it done 100 miles away after towing it and staying in the nearest motel. It's probably getting just enough more power from the alternator when is running to barely sustain it.