7.4l

  1. J

    97 Suburban K2500 7.4 MPFI Stutter

    Hi all! I’ve been chasing this stutter I’m having and have replaced just about everything on this thing haha. I purchased the truck and it had the dreaded intake manifold coolant leak so I replaced a ton of parts while I was there. Once the engine is warm wether in park or at a complete stop in...
  2. J

    Error Codes after MAF Replacement

    I have a 2000 C3500 with the 454. I have replaced to MAF just due to age, thought it wouldn’t hurt. The first one replaced with a Blue Streak MAF and after the second warm up cycle I am getting code P0172 and P0175, also had O2 sensor codes but dont remember them. Replaced O2 sensors and those...
  3. Amsterdamned96

    Questionable epoxy/weld job

    This is an ALLEGEDLY low-mileage 4-bolt main Gen iv 454. I’ve been told it’s been damaged by a fire, I can’t wether this is what caused to block warp & tear. The bore measures stock and the cross-hatching is intact, the interior also showed little wear coinciding with the low mileage. There is...
  4. W

    L29 VIN J 7.4L Vortec (fuel rail, 8-injectors, FPR & wiring harness TSB maybe?

    I've been told there was very likely a TSB for an assembly that consisted of the title mentioned components. I haven't been able to accomplish a find using typical searches. I actually have one and I've some interest.
  5. Sunbelt56

    Slight surging between 65 & 70 mph - overdrive shifting in and out?

    I get up to 65mph on the highway and try to slightly accelerate and between 65 & 70 mph I feel the truck surging like it's going in and out of overdrive. The transmission fluid was recently changed and it did the same thing before. It seems to be fine when it gets over 70mph. I can get it up to...
  6. Tom Nassar

    1998 K2500 7.4L fuel pressure regulator replacement

    I am replacing my fuel pressure regulator, so I am taking the opportunity to replace the intake gaskets and camshaft position sensor, cap, and rotor. Is there anything else that needs to be addressed while in there? Fuel rail? Thanks
  7. F

    Gibson GP113S-C

    It seems like Gibson is the about the only one who makes headers for the l29. Are people happy with them? Is fitment good in a K-Series? Longevity? Plug wire issues? I need to put mufflers on when it comes out of storage. Wanting a 411 swap. Probably head gaskets due to it using...
    • Franksmith
    • Thread
    • 454 vortech 7.4l gibson gibson gp113s-c headers l29
    • Replies: 1
    • Forum: Exhaust

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