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  1. Hodgeee

    Rpm drop when stopping.

    Wow, put in my new Hitachi TB(original supplier for GM throttle bodies) did the relearn. Now the rpms dip about 50rpms only on very hard breaking, which is normal. Dorman electronics suck from my experience. This was replaced by original owner 12000 miles ago. My friends Avalanch had a...
  2. Hodgeee

    Rpm drop when stopping.

    Do you have the 6L?
  3. Hodgeee

    Rpm drop when stopping.

    Yeah, i was surprised also, but saw it was in spec.
  4. Hodgeee

    Cost of trans fluid change

    Yeah, funny, ive run into that. Just right off the bat, oh we need to do this or that, without even looking at them.
  5. Hodgeee

    Rpm drop when stopping.

    That makes me wonder if the new pump was not right. It sits at 48psi, but dips to 43 right at that rpm dip. According to my GM service and repair manual 43 to 48 is listed as normal pressure levels. The stock pump ran right at 43 and never dipped. But it would jump into the mid 55 range when...
  6. Hodgeee

    Cost of trans fluid change

    Ive heard way more problems with the 8 speed, when people thought the 6 speed was bad. As long as you properly flushed or changed your tranny fluid on 09 to 14 truck six speeds, and changed your transmission temperature thermostat to the 154 degree one on 15 and up truck six speeds. They...
  7. Hodgeee

    Rpm drop when stopping.

    It aint bad, once again, the weather was cool today, only 90 out, and the problem was much less noticeable. Plus raising the idle rpm to 600 made it drive better, and less affected by the rpm drop. Im kind of accepting that its normal maybe. Just waiting on the new AcDelco TB. mine is...
  8. Hodgeee

    Cost of trans fluid change

    If you have a good tranny shop in town, i guaruntee they know the transmissions better than the dealerships, and would cost less.
  9. Hodgeee

    Cost of trans fluid change

    Years ago i started my automotive career with Ford. Back then we charged $45 a labor hour. 90% off all dealership profits came from maintenance and parts. This small dealership made $150,000 a month from those two departments. The new large dealerships today make as much as 1.5 milllion a...
  10. Hodgeee

    Rpm drop when stopping.

    Just wondering if anyone else has vapor lock issues, not the topic of this post. We had a break from the normal 105 degrees today, it was rainy and overcast and was only 78 degrees outside this monring. While running errands, no idle issues, and the rpm drop at braking, seemed noticable less...
  11. Hodgeee

    Rpm drop when stopping.

    Interestingly, i have a friend mechanic that works at the local Chevy dealer. Turns out that he is pretty good friends of the main mechanic that does all the Police Tahoes under contract. He took the truck first thing this morning, went over everything he could related to the braking issue...
  12. Hodgeee

    Rpm drop when stopping.

    Holy poopies, im in the stone age compared to you. Ill send you a message.
  13. Hodgeee

    Rpm drop when stopping.

    May consider especially if you have a full active scanning pad. My handheld tuner can datalog and then i look at it in Data Viewer. But i cant look at the pedal control values, or mid TB values properly, only going over driven data, same for MAFS.
  14. Hodgeee

    Rpm drop when stopping.

    Oh, by the way no voltage drops or spikes.
  15. Hodgeee

    Rpm drop when stopping.

    Ok, datalogged the driving. Engine load at idle in gear and braking is 23% to 25%, regardless of braking force, which is normal for these tahoes. This means nothing with the tranny, and no extra drag from pullies, even AC on and off was only maybe 2% more drag. My tuner only allows 50rpm...
  16. Hodgeee

    Rpm drop when stopping.

    Ok, bumped the idle from the factory 550 in gear, and 500 in park or nuetral up 50rpms on both. So rpms are still dropping down to 350 when braking, and now its starting to do it even at low speeds, but i think its the temperatures causing it. When it was cooler out it only did it on medium to...
  17. Hodgeee

    Rpm drop when stopping.

    I have a tuner that i can look at load, thought about that but never tested it, will check it out tomorrow. They said too late to cancel throttle body, but i can return it once i get it. Might just keep it, especially i trust an AcDelco unit better than the Doorman. Had issues in the past...
  18. Hodgeee

    Rpm drop when stopping.

    Canceled throttlebody order. This morning a friend of mine let me put his 2008 Avalanch tb on. Relearned it, went and drove, does the same thing. Put mune back on, relearned and same thing. I do notice that the idle thing starts when its 100 degrees or higher. Being annoyed, took it to a...
  19. Hodgeee

    Rpm drop when stopping.

    Thanks for the tip.
  20. Hodgeee

    Rpm drop when stopping.

    $138, Acdelco, cheapest i could find.
  21. Hodgeee

    Rpm drop when stopping.

    I think i might have figured it out. Was going to redo the grounds since its only 91 out, mild for our summers. Decided to remove the throttle body for a deep clean, saw it was a Dorman. I know when you put in a new throttle body accordimg to my service manual, your supposed to do a relearn...
  22. Hodgeee

    Rpm drop when stopping.

    Tested, seems fine, charges at 14.4volts, plus new battery.
  23. Hodgeee

    Rpm drop when stopping.

    Checked fuel pressure, its the same as before the new fuel pump 43 to 48. It settles at 48psi, but with a lot of stop and go traffic, it goes up to 55 to 58psi which is high for the Flex motor. When this goes up, then my idle swings up and down at parkin lot speeds, and sometimes at idle. If...
  24. Hodgeee

    Rpm drop when stopping.

    Been doing it for about 6000 miles. All the work was completed about a month ago to no avail. Tried the braking from speed, same thing. Noticed something i have never seen before. When coasting, between 5 to 8mph at the walmart grocery, the idle would do the same thing continously. It did...
  25. Hodgeee

    Rpm drop when stopping.

    Ill try tomorrow to redo all the grounds, cant hurt.

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