Search results

  1. M

    2023 Premier Cylinder Deactivation Questions

    No, because GM regrets letting drivers know when the vehicle was in V4 mode vs V8 mode, which gave some drivers additional ability to correlate symptoms to V4 mode, or transitions between. Plus your engine has V8, V7, V6, V5, V4, V3, and V2 modes (SEVENTEEN different firing orders, actually!)...
  2. M

    Major upgrades GMT800, 06ish XL 2500

    Still haven't defined your terms yet. A 'vette is PERFECT for some things, sucks for others. Same can be said for a 2500 suv. A 6.6L DuraMax would be pricey ... but the bang for the buck would be tough to beat, especially if you figure out how to run it on alternative fuels.
  3. M

    DFM disabler released

    Deceleration Fuel Cut Off / DFCO (0%TPS) has been a feature since at least the 80s, likely earlier. Normally, the engine twists thru the transmission, which twists the driveshaft, which twists the R&P, which twists the axles and tires, which pushes the car down the road. During DFCO, the entire...
  4. M

    IS AFM DISABLEMENT NECESSARY??

    I don't think I'll ever be funny enough, but I'm funnier than what happens when V4 mode fails, or when the TCC fails and takes out the transmission with it.
  5. M

    What is a Z71 Tahoe

    Not concerned with the tune, me & my tuner already have that covered. Won't drive my Z71 over 90MpH anyway - plus I'm far more interested in fleshing out how to make the engine and transmission suddenly reluctant once coolant hits 221F. My major concern is springs (torsion, coil), shocks...
  6. M

    What is a Z71 Tahoe

    So far, this has been impossible for my 22 year old Tahoe.
  7. M

    Ran out of gas! 2008 LTZ

    When it ran out, where you on level ground, or was the vehicle tilted? Haven't 'ran out' in over 20 years by using this advice, nevermind vehicle make & model, on 3 continents: If it says you have under 1/4 tank left, you better already be pulling into the gas station.
  8. M

    IS AFM DISABLEMENT NECESSARY??

    To answer the title: technically, no, it is not NECESSARY. (Although core / trunk exercises are not strictly necessary, my lower back regrets that line of thinking.) There is no Engine Control Module 'reset' that can fix the mechanical problem you described. To address the noise that your...
  9. M

    What is a Z71 Tahoe

    I've wondered the same. Is my 4WD in any way different from other 4WD? Is the Z71 suspension different from a non-Z71 4WD Tahoe? If so, how so? And questions like that ... specifically: What are the pertinent similarities between a SSV and a Z71? Differences? What are the pertinent similarities...
  10. M

    Will it fit

    Then you'd likely need an AWD 'none selecatble' from another Denali or Escalade? As for the 4L60E, I imagine that you'd also need one from another Denali or Escalade. All that said, it's very likely that a better long-term investment'd be to properly rebuild the ones you already have, unless...
  11. M

    Big Brake Upgrade finally done!

    1. Depends on which Suburban you're referring to, but here's a question that'll give perspective: Compared to a 'vette panic stopping from 40MpH-to-0, how much more energy is being converted to heat by a 'vette panic stopping from 80MpH-to-0? Answer (even though I don't know my Newtonian physics...
  12. M

    Need advice on 4X4 replacement suspension

    Who does NOT see it that way? Comparing worn out parts to brand new parts is easy. The more relevant comparison is between original, vs 'GM OE' from about ten years ago, vs today's 'GM OE' - and don't forget that we're discussing 20+ year old vehicles. I freely admit that even today's 'GM OE'...
  13. M

    Need advice on 4X4 replacement suspension

    After 20 years, it's not like GM Genuine / AC Delco (same difference) are going to get any better - they're not even going to be able to maintain GM OE quality standards from 20 years ago. 2 aftermarket companies that come to mind for exceeding GM OE are Cognito MotorSports...
  14. M

    6.2 L92 Volumetric Efficiency

    Regardless of engine & cam & heads & intake manifold & exhaust SCAVENGING, VE varies across MAP readings & RpMs. Multiply the VE by a displacement (cylinder or engine), and you have the amount of air 'expected'. VE @ closed throttle @ 600RpM is less than VE @ closed throttle @ 1000RpM, but not...
  15. M

    Planned Obsolescence: ain't making them like they used to ...

    this is certainly more true of the GMT8-- than the GMTk2--. Someday you may chide your nephew or niece for buying a GMTk2 with 160,000 miles. They're likely better off buying a port-injected 30 year old survivor, even with more miles.
  16. M

    Planned Obsolescence: ain't making them like they used to ...

    If a GMT8-- or GMT9-- engine / vehicle doesn't make it past 250,000 miles, don't blame GM, blame the owner / mechanic. If a GMT1-- or GMTK2-- makes it past 200,000 miles, thank the owner / mechanic. The spirit of the Phoebus cartel has taken possession of the world's automakers.
  17. M

    Planned Obsolescence: ain't making them like they used to ...

    Pam, Cheryl, Lana, & Carol, in unison: Spleusch ...
  18. M

    Had an interesting performance-relevant experience while driving today.

    Adults should not need 'the law' to protect themselves and each other from the consequences of stupidities. Another way to think of it: The careful and considerate actions of the reasonable and prudent majority (of well-trained drivers) should be legal.
  19. M

    New to catch can

    If it does - worst case - you know how y'all unplug the AFM / DFM disabler before you drive into the dealership ... ... unless they're not wet blankets over there? Since the smog test mech-tech likely has the CARB monkey on his back, maybe make the catch can as easy to uninstall, as to reinstall?
  20. M

    Nanny warnings

    Yes, a GMT8--, from 2000 - 2006. Not as sophisticated, but many of the features are already in my schidty old cellphone. Maybe a GMT9--? 2007-2014. My old standby joke here: if you can afford a GMTk2--, you can afford two GMT8--s, two GMT9--s, or one of each ...
  21. M

    2013 Yukon/I’m new to car building anything helps

    Since you likely have a 6L80, you'll want to upgrade to 3.73 axle(s) gear(s), cam or not, heads or not.
  22. M

    New to catch can

    Second sentence will prove the first, after a few years. Watch ... As catch cans are not technically endorsed by the CARB yet, it's caveat emptor, meaning, you do your due diligence. To oversimplify, you do NOT want a straight easy path from the crankcase (back) to the combustion chamber. The...
  23. M

    Dexos... High Mileage oil

    IFF you drive very gently, they should not make you nervous. If your engine works or plays harder than a gentle boring commute, 0W30 / 5W30 is the FAR wiser choice. Many engines that spec'd 5W20 in America spec'd 5W30 at the exact same time in Europe. CAFE MpG scores consider engine longevity...
  24. M

    Planned Obsolescence: ain't making them like they used to ...

    Even if true, direct injection made the slope much steeper much more quickly. At least port fuel injection sprays fuel at the back of the valves, which keeps them kinda clean. Direct injection lets the back of the valves get filthy MUCH sooner. Thats's why direct injection engines suck on deez...
  25. M

    Catch Can for 2006 Tahoe 5.3

    @adriver: don't forget that some of that 'vapor' that the catch can is ... catching ... would definitely wind up in the exhaust ... and some of THAT winds up in the EGR. PCV system relieves excess crankcase pressure, AND undesirable combustion products in a vaporous state. Catch can keeps the...

Forum statistics

Threads
132,301
Posts
1,865,657
Members
96,888
Latest member
madmoney

Latest posts

Top