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Found 2 results

  1. While driving my 2014 Silverado, I never have a problem if I accelerate quickly. However, there has been skipping/sputtering when I coast or slowly accelerate. This is not a clicking, loud knocking sound like I see most describe on here... Anyone have any idea what it could be? Thanks in advance! If needed I can try and video the sound later on today.
  2. This is my first post and I'm new here. I have a '07 ext cab Silverado, 4.8, 96,000 miles, non-flex fuel, LT, 2WD, 3.23 rear, in Tennessee. The problem started one day when I left a traffic light. I took off and when it reached around 10 mph, it dumped out and then picked back up as if it was out of gas, which I thought it was. It was very low on fuel. I stopped and got some gas but the problem persisted and got worse. I thought I had let the fuel level get low enough to pick up some trash from the bottom of the tank. I've done this before and it clogged up the fuel filter. But, alas, there is no serviceable fuel filter on this truck. I continued driving it with the sputtering/dumping/hesitation/whatever you call it. It feels like you hit the throttle and then once it starts going you've turned the key off. But it picks back up. I finally got a "check engine" light so I pulled the 3 DTC's, which were all fuel pump related, one being the fuel pump relay, which I changed. Cleared the codes, they came back with a vengeance, so I exposed the fuel tank from the top. Back in the day, I could pull the bed off a Silverado with one other person and set it on the ground. This truck has a heavy bed, plus I had no immediate help, so I devised a slick way to slide the bed back three feet by using a couple of 4 ft 4x4 posts and two pieces of 6 ft. conduit, but that's for another post, I guess. Anyway, I pulled the pump, set the pick up in a can of gasoline and wired it straight to the battery. It made way more noise than I thought it would make, plus it barely trickled gasoline out the supply. So I disassembled the rack and cleaned everything to where it all looked like new and tried the straight wire thing again. Same result, so I ordered a new Delphi fuel pump assembly and waited three days for it to show. Hey, $256 vs. $526 at my local dealer is worth a three day wait to me. In the meantime I dropped the spare tire and pulled the plug and cleaned all the terminals of the harness junction and verified a good ground. Got the new pump and installed it. The truck cranked right up and throttled up just as it should, so I put the whole thing back together and went for a test drive. It did the dump out thing almost immediately but not nearly as bad. Also, it doesn't just buck once. It felt like you were trying to break a horse, as if someone was driving and going from no throttle to wide open throttle and back again. If you barely used any throttle at all, it would almost act normally so I knew the problem was in the fuel delivery. However, within ten minutes the engine had sputtered to the point that I barely got it back in to my driveway. Now it will not crank. Fuse, relay and fuel pump have been changed. Ground and wiring are good, but I'm about to put it on jack stands and recheck the ground because I have a funny feeling about it. Any help would be greatly appreciated. I rebuild muscle cars from frame off and everything in between so I'm the guy that has never taken a car to a dealer or a repair shop for anything. My day job is as a Network Engineer so I was one of the few that welcomed the auto computer age so that doesn't scare me either. I will say, though, that this truck requires some searching if you're looking for something like a relay. Thanks in advance for any help.
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