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By Pierre-Nicolas Minjauw
Hi! So about 2 months ago my fuel pump went out. Had it replaced and right away we noticed sometimes it would crank but No start. After a few days the pump was defective, so replaced it again. Pump ran great with good pressure but after about a week or so, same issue crank but no start. Sprayed some starter in the manifold sometimes start, sometimes no. Turn key on/off to cycle and then sometimes start, sometimes no. Used the pressure valve behind the spider to bleed air/fuel then engine start fine. Would run fine for a couple days up to a week and then same thing all over again. Took it to local chevy. Diagnosed fuel pump, ... good to go they said, everything working properly. 2 days later No start and this time cannot get it to turn over, pressure is at zero. Pump is still turning on but not humming like it was. Replaced MAF and distributor cap as well as fuel filter. My local mechanic and I are stumped, and I'm already $1000 in on repairs. Please help!
Hello to all, new to forum and have a few questions. Purchased a used 2019 RST with the 5.3. Not new to AFM but first truck with DFM and Auto Start/Stop.
I installed a Pulsar LT unit, programmed per instructions/videos. Maybe it's me but it seems the DFM delete function isn't working as it should but the Auto Stop/Start functions works fine.
It seems that there is still a bit of hesitation and shuddering when accelerating.
Any thoughts or should I be considering other issues.
By kevin camps
driving a 97 k2500 camper special, 4l80e with 454 vortec
couple days ago I got in my truck after work and noticed it would stumble when hot, 100C no problem but a little bit warmer and i would have issues. always under load during acceleration. got home and idled in drive and it felt like an obvious misfire, RPM would drop to about 500. pop it in neutral or park and no misfire or stumbling, its been confusing me since in the mornings when i pull it out the garage it has no problems all the way to work (5 minutes highway and 5 minutes city) but end of the day and evening- same issue
bought the truck with 268km now has 276, oil change every 5000k.
did fuel pump (48psi at idle now) FPR, distributor cap and rotor, plug wires and plugs, ran seafoam through the intake and in the fuel tank.
ive heard of distributor gears going south but id assume then i would have the issue when cold too. runs like a top at any temp below 100C, no engine light, plugged the scanner in anyways and no codes whatsoever.
any help is appreciated, looked through forums for a couple days now but nothing exactly like what I'm experiencing.
I purchased a 2021 Silverado Crew Cab High Country 4WD about 4 months ago from Watson Chevrolet in Tucson Arizona. Within week of driving the truck I began noticing some pretty strange sporadic things happening. I started video taping the issues when I could to document what was happening. Ticking noise coming from the engine when cold starting, sporadically have hourglass on stereo saying “loading” it would continue until the engine was turned off and back on then it was OK. “Park Assist” Error message sporadically popping up while driving down the road, Horn honking (three short honks) for no reason while sitting in traffic at a red light. At 900 miles I reached out to the dealer and told them these concerns and issues I was experiencing. The service manager explain to me “the truck has a lot of technology and it just needs to learn your driving habits, you just need to keep driving it”
At 11,000 and 3 months after purchasing I get the loud lifter noise, “Service parking brake”message, “steering assist reduced” message, “Service ESC light” and “check engine light” I drove it into the other dealership located in Tucson (O’Reilly Chevrolet), they keep the truck for about three weeks and “replace lifters on one bank and 1 bent push rod” and tell me that they couldn’t duplicate any of the other issues however they did a firmware upgrade and everything should be fine. One week after getting the truck back (11500 miles) I get another check engine light, Keep in mind I can still hear the lifters ticking when starting it first thing in the morning. I take back to the dealer after a week of a being in the shop, They tell me “The check engine light was because there was multiple cylinder misfire and it was the opposite bank from the lifters they replaced” however they can’t duplicate the problem so there’s nothing they can do. They admitted that the computer had logged over 200 misfires on one cylinder and that’s what made the check engine light turned on, then they go on to tell me they can’t duplicate the problem so there’s nothing they can do. I asked them about the ticking noise when starting and the tell me “that’s normal, it’s not lifter noise you’re hearing, it’s the new technology fuel pumps GM is using that’s making that noise”
Other issue I have had is the rotors on all four wheels at times will turn blue and discolored as if the brakes and her have been completely overheated. But it’s not the entire rotor It’s only the center inch of all rotors. The inside edge and outside edges look normal.
I have a purchased over 11 band new (Ford, Chevy, Dodge, Toyota) Trucks in the past 30 years this is by far the worst freaking vehicle I have ever purchased.
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