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  1. R

    2003 Yukon won’t accelerate past 3,000rpm and chokes/sputters

    Truck is back to running poorly when going down the road, I now have a Delphi fuel pump on the way and will be installing this weekend. If that doesn't work I'll move on to injectors, which are doubtful, but if that is the case it'll be a bit before I buy all of them. Thanks for everyone's help...
  2. R

    2003 Yukon won’t accelerate past 3,000rpm and chokes/sputters

    The fuel pressure regulator is brand new, was replaced before I got the truck. I just replaced the fuel filter last night as well, and removed the vapor canister.
  3. R

    2003 Yukon won’t accelerate past 3,000rpm and chokes/sputters

    I’m thinking it’s going to be the check valve as well, so the pump will definitely be coming next as well as cleaning off the tank itself with all the mud. I’ve got a decent scanner I use on both of my Mercedes. I can’t believe that A Tech scanner is more than a STAR diagnostic for the Merc.
  4. R

    2003 Yukon won’t accelerate past 3,000rpm and chokes/sputters

    What are you thinking is the issue?
  5. R

    2003 Yukon won’t accelerate past 3,000rpm and chokes/sputters

    Fuel pressure regulator was recently replaced but I discovered today that they did not replace (or attach at all) the vacuum line for the regulator, so I replaced that. I also installed a new fuel filter and that definitely helped the issue by a decent margin, but you still can't get down in it...
  6. R

    2003 Yukon won’t accelerate past 3,000rpm and chokes/sputters

    Alright, just got the fuel pressure test done and it’s holding 50PSI at idle, but once it’s turned off it leaks down pretty darn quickly. Shop said should expect a leaking injector possibly, but the truck has been starting almost instantly and idling without issue.
  7. R

    2003 Yukon won’t accelerate past 3,000rpm and chokes/sputters

    I was having this same train of thought, I don’t want to immediately jump to the fuel pump (even though they go out left and right in GM vehicles). I’m going in the morning for the fuel pressure test, then taking it over to a family members house to drop the tank and see what I’m looking at as...
  8. R

    2003 Yukon won’t accelerate past 3,000rpm and chokes/sputters

    In regards to a tune up, the truck does have brand new ignition wires and NGK spark plugs that were done about 2,000 miles ago. I don’t believe the ignition coils were replaced, but from my understanding the issue I’m having is not related to ignition coil failure.
  9. R

    2003 Yukon won’t accelerate past 3,000rpm and chokes/sputters

    Thank you all so much, sorry it took so long to get back to you all as I’ve been at work. A few more details, sorry I’m leaving things out, but the truck will drive down the road. I can take it to work and back, the issue just gets worse the lower it gets on fuel. The truck had all the seals...
  10. R

    2003 Yukon won’t accelerate past 3,000rpm and chokes/sputters

    Unfortunately, I’m unsure quite how long it’s been going on, I just know that it has been going on before the work was done to the truck. The truck was my best friend’s and also used for “mudding” a good bit, but I’m setting aside some time tomorrow to get a fuel pressure test done and I plan on...
  11. R

    2003 Yukon won’t accelerate past 3,000rpm and chokes/sputters

    Hey all, I’m having an issue on my 2003 Yukon that seems to be fuel related. The truck had all the seals redone in the motor not too long ago, holds great oil pressure and runs smooth, but I’m unable to accelerate past maybe 1/4 throttle. The truck will sputter and back fire, and it gets worse...

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