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  1. LsHart

    Delayed shifting after throttle body cleaning

    When the truck is at idle, the butterfly valve in the throttle body is at rest. Which will let it idle. When computer looks at throttle when pedal is pressed the stepper motors in the throttle body are done for to be to the point. And the computer doesnt know the true value of the throttle body...
  2. LsHart

    What did you do to your NBS GMT800 Tahoe/Yukon Today?

    Lol!!!
  3. LsHart

    A/c causing my throttle to fluctuate and drop too low

    Sorry, but was just addressing the forum title. I might have missed something. All is well.
  4. LsHart

    No A/C, driving me crazy.

    In my experience go to the ac compressor relay and remove it. Key off, on one of the pronges u should have 12v. Constant. Then key on or crank it. Have someone cycle the ac button and check for switch on 12v. When button is pressed. If both are there then the problem is under the hood. If 12v...
  5. LsHart

    2000 GMC Yukon XL 1500 SLT 2WD (5.3L) - Brake Pedal Goes to the Floor

    Question, if u pump the brake when trying to stop does it? Or is it always straight floor
  6. LsHart

    2007 Yukon Denali RPm increase without pedal input

    Quality of part matters too
  7. LsHart

    New to forum

    Try carid.com
  8. LsHart

    Delayed shifting after throttle body cleaning

    Hook a scanner to it and go to data. Watch what the throttle percentage is at idle and or throttle. And watch the MAF. Air volume has increased but not to the MAF. Get some MAF cleaner and clean it and see what happens. Not sure if ur fuel trims and or keep alive data can be reset.
  9. LsHart

    Driveline vibration

    Granted they know what there doing
  10. LsHart

    Driveline vibration

    Dealer should have reset everything needed for the replacement.
  11. LsHart

    Lost and more than a little bit concerned...

    Also check PCM or ECM relays
  12. LsHart

    Lost and more than a little bit concerned...

    The alternator code has me. The others are mostly communications codes. If there isn't constent power thru the system, PCM will drop systems to stay running.
  13. LsHart

    A/c causing my throttle to fluctuate and drop too low

    That's what fluctuate is. The going up and down. Also called hunting. Compressor kicks off, then the idle returns to normal. Am I missing something?
  14. LsHart

    Suspension Squats when loaded down

    Shocks and struts, the actual strut shock, they keep the tire on the ground and springs and coils push the vehicle up. So stiffer springs fight the sag.
  15. LsHart

    Driveline vibration

    Possibly drive shaft wasn't put back where it was before removing it. There balanced. So now drive train is off balance. Doesn't take much. Or u joint failure.
  16. LsHart

    Delayed shifting after throttle body cleaning

    U get what u pay for. Stick with brand. Good quality scanner will be needed.
  17. LsHart

    New to forum

    Sup from North Mississippi!!!
  18. LsHart

    What did you do to your NBS GMT800 Tahoe/Yukon Today?

    Plastics are dry like an ashy elbow but that part is done.
  19. LsHart

    Delayed shifting after throttle body cleaning

    Yes, just a slight manual opening of these types of throttle body's will screw it up. Just say u bump the butterfly open a little and the computer doesn't or can't see it.(the slight adjustment) then they will be off and it will effect the drive ability of it.
  20. LsHart

    Oil Pressure Issues

    In my opinion, sensors that are dire to engine and computer sync. I would go with OEM sensors. I have ran rockauto and partsgeek and autozone cam sensors. OEM fixed the issue. Just me though.
  21. LsHart

    2004 Yukon - Feels like Ice Skating - HELP!

    Is the rear panhard bar bolted in? Trac arms? If ur lowered and or stock, hitting the 18 wheeler grooves in the road will aways make the vehicle wonder.
  22. LsHart

    A/c causing my throttle to fluctuate and drop too low

    When the compressor kicks in the idle goes up to compansate. Will never go away. Rpms have to go up to deal with the compressor engagement.
  23. LsHart

    Delayed shifting after throttle body cleaning

    FYI, those fly by throttle bodies are real sensitive. Cleaner or dirt got into the idle air or the tps sensors when cleaning and at that point replacement needed.
  24. LsHart

    What did you do to your NBS GMT800 Tahoe/Yukon Today?

    Upgrade the OEM.
  25. LsHart

    Suburban died and won't restart (but sometimes it does...)

    She is getting plenty of tackling fuel!

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