hermit Posted September 17, 2011 Share Posted September 17, 2011 I have suspected my fuel pump to be going bad for a while now, and a couple weeks ago, I was on my way to work when my truck started sputtering as if it were running out of gas. I was able to sputter up to the closest auto parts store and put a new fuel pump in there in the parking lot. After I got the new one in, it started right up and ran great for about a week. Then it started sputtering again just like it did with the old one. When I got under there and looked around, I noticed that I had failed to secure the electrical wires going to the pump and they had been dangling on the driveshaft. This rubbed the rubber off of one wire just enough to bare the copper wires inside. The other wire however, was rubbed so badly that it was only still connected by 3 of the little copper strands. So I fixed the wires and I still had the same problem. I then tried putting some Lucas fuel injector cleaner on the tank and changing the fuel filer, but it still hasn't solved anything. Also the gas tank was replaced about 6 months ago. I am at a loss as to what the problem could be. Could I have damaged the new fuel pump by running it with the wires worn so thin? The truck acts like it is not getting any fuel when I accelerate and it back fires, but it idles just fine. Link to comment Share on other sites More sharing options...
Boots Posted September 17, 2011 Share Posted September 17, 2011 Check the ballast resistor on the drivers side fender under the hood. The ceramic thing with two wires connected to it, make sure there aren't any cracks... Link to comment Share on other sites More sharing options...
hermit Posted September 17, 2011 Author Share Posted September 17, 2011 I found that ballast resistor. There were no cracks but I unplugged the wires and rubbed the corrosion off anyway. ( It's worth a shot :dunno: ) I'll see if it did me any good in about an hour when I get off work. Link to comment Share on other sites More sharing options...
hermit Posted September 17, 2011 Author Share Posted September 17, 2011 Well, I don't think that was the problem. I was still acting up all the way home and then back into work tonight. Anybody have any other ideas? I would really appreciate the help, it makes me nervous driving it around like this. Link to comment Share on other sites More sharing options...
Fezzik Posted September 18, 2011 Share Posted September 18, 2011 stupid question, but how long has it been since you changed the fuel filter Link to comment Share on other sites More sharing options...
hermit Posted September 18, 2011 Author Share Posted September 18, 2011 I just changed the fuel filter last week but it didn't do any good. Also I put some fuel injector cleaner in the tank at the same time. Link to comment Share on other sites More sharing options...
tbrand Posted September 18, 2011 Share Posted September 18, 2011 Have you checked the O2 sensor? Mine idled fine, but seriously bogged under acceleration. New fuel filter, tune-up, all sorts of stuff had no effect. New O2 sensor - ran terrific. Link to comment Share on other sites More sharing options...
hermit Posted September 18, 2011 Author Share Posted September 18, 2011 Have you checked the O2 sensor? Mine idled fine, but seriously bogged under acceleration. New fuel filter, tune-up, all sorts of stuff had no effect. New O2 sensor - ran terrific. No, I hadn't thought of that. I'll pull the sensor from my donor truck and see if that helps. Link to comment Share on other sites More sharing options...
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