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  1. M

    99 Tahoe running rough

    So obviously I’m throwing a code, replaced the engine about a year ago, in the video it’s hard to tell but it runs rough (shaking,rumbling) but a couple seconds after I let off the throttle it goes silent, almost like the car cuts off but obviously it’s not and then I hit the gas again it’s...
  2. M

    99 Tahoe 5.7 vortex P0300 code HELP

    So, I replaced the injectors and fuel filter, pretty sure that took care of the problem, but now it’s got this tick that accelerates with the acceleration, assuming I got some junk in a lifter, will have to play with that later, thanks everyone!!!
  3. M

    99 Tahoe 5.7 vortex P0300 code HELP

    I’ll have to check that and get back with you tomorrow.. so everything I’ve done since replacing the engine, new wires, new spark plugs, new distributor, cap and rotor, pcv valve, map sensor, ignition coil, I think that’s it so far
  4. M

    99 Tahoe 5.7 vortex P0300 code HELP

    I did look inside the throttle body and it’s pretty gonked up rhough
  5. M

    99 Tahoe 5.7 vortex P0300 code HELP

    And yeah as far as I can tell everything is intact and no leaks as far as intake and exhaust goes
  6. M

    99 Tahoe 5.7 vortex P0300 code HELP

  7. M

    99 Tahoe 5.7 vortex P0300 code HELP

    This is a brand new spark plug from cylinder 1, 1 of the cylinders that I’m getting misfires at
  8. M

    99 Tahoe 5.7 vortex P0300 code HELP

    Could it be my fuel injectors are bad? Again though, I didn’t have this problem before I changed the engine
  9. M

    99 Tahoe 5.7 vortex P0300 code HELP

    Sorry for the late response, been a busy week but here’s an updated data screen to temp
  10. M

    99 Tahoe 5.7 vortex P0300 code HELP

    So this is what I’m currently looking at in park.
  11. M

    99 Tahoe 5.7 vortex P0300 code HELP

    Okay yeah they’re original. Came with the new motor, I’ll get some, I also just changed the MAP sensor, what’s the best way to check the hose from the solenoid to the heater core ?
  12. M

    99 Tahoe 5.7 vortex P0300 code HELP

    Will be here Monday, thank you!!
  13. M

    99 Tahoe 5.7 vortex P0300 code HELP

    Unfortunately I don’t have the OBD scanner anymore so now I’m at a loss
  14. M

    99 Tahoe 5.7 vortex P0300 code HELP

    So, a quick update, replaced the pcv valve along with the hose connections, and it’s not bogging down when I take it out of park, still throwing the code and running a little rough, gonna dig some more into it this weekend, would any one suggest getting new grommets for the intake?
  15. M

    99 Tahoe 5.7 vortex P0300 code HELP

    It the pcv valve hose, but I’m not sure if it could be part of the problem
  16. M

    99 Tahoe 5.7 vortex P0300 code HELP

    What is this called, and could it have been a problem, I heard air coming out of it and when I took it off it just kinda crumbled in my hand
  17. M

    99 Tahoe 5.7 vortex P0300 code HELP

    It did not come with anything but I did replace the distributor cap and rotor, along with new plug wires and plugs I’m also having multiple misfires on 1 and 5
  18. M

    99 Tahoe 5.7 vortex P0300 code HELP

    I’ll definitely take a look at that in the morning! I appreciate it.
  19. M

    99 Tahoe 5.7 vortex P0300 code HELP

    Just replaced my 5.7 vortex with a brand new crate engine, everything went good but now it’s throwing the infamous p0300 code and just wondering if anyone else ever had this issue or knows what I can do to fix it thank you

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