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  1. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    Delco 41-110 plugs. I'm looking for a receipt or something but not finding it. It wasn't Amazon this last time, I know that. I try to avoid potentially scammy stuff, but maybe I just got some bum ones. I dunno, but I'll run it a while and see if they look like they are taking a premature beating...
  2. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    My wife is pretty consistent with Costco premium gas, which is Top Tier certified. And to clarify, premium is required for the 6.2. I asked my tuner if I should be running different plugs, and I'll do a datalog and see if he has any ideas otherwise.
  3. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    Victory, -ish. Replaced the negative cable that was corroded, no change but it needed to be done anyway. Dad asked about spark plugs and if maybe they were fouled or something, I hadn't pulled them yet, so went ahead and checked #1. The tip was trashed... #2, also trashed. These were Delco...
  4. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    I think my grandpa's '78 GMC motorhome scared me more than anything. It had the full interior stuff that made the doghouse a pain to remove, and when he replaced the 400 after 25 years of heavy use, it was quite the operation with the core support chopped out, the whole front end removed, and if...
  5. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    That's where I realize I was wrong. I didn't know the doghouse was as big or as useful as it is. I also replaced a heater core on a Kodiak in a couple of hours, did a water pump on an express in 25 minutes in a hotel parking lot (minus fill time), and have generally grown to like the seating...
  6. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    I live at that dot for Grand Prairie, right in between Dallas and Ft Worth. We go about as far as the center of Arlington pretty often, south to the main highway along the bottom often as well, rarely north at all, and east is the ghetto where I don't want my family going if they can help it...
  7. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    I need to talk to my tuner again, he discussed that with me, and my recollection was that he "turned it off". I never run E85, too difficult to get and the 21 gallons with 11.5 mpg on premium sucks bad enough already for frequent fill-ups, especially only a few stations that carry E85 in the...
  8. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    My understanding was on a small set of vehicles, the flex fuel adjusted fuel pressure instead of fuel trims. Then GM figured out it was better to just leave it all in the fuel trims, and a few years of 6.2 SUV's have an odd configuration to show for it. I could be wrong, but piecing together a...
  9. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    Yep, 8 lug conversion, preferably extended length, would be ideal. We don't tow much, but it does need to realistically pull 5-6k without going through heroics to fit in the fleet. The GMT800 1/2T SUV's are good for me, 4L60 aside. I've had a couple of them and know the few quirks pretty well...
  10. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    I didn't either, from what I saw it was fairly limited to certain combinations of 6.2 trucks, mainly the Denali and Escalades. I ran a temporary extra ground, no change, watched the ECM voltage through the condition, didn't really budge. I'm going to look and see if maybe there is an injector...
  11. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    It felt like low fuel to me too, but when I unplugged the MAF to do a Seafoam treatment (which didn't help, both in the intake and heavy dose in the fuel tank), it went to 58 psi and held there to problem, the fuel trims went crazy as expected, then after relearning, the issue was still there. I...
  12. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    Factory sensor on the datalog. I'm not sure if there is a test port, I do have a small gauge that I can check it against for Static pressure, but not WOT pressure. I'll add that to the list tomorrow.
  13. Hunter79764

    Odd "Misfire"? on 2013 Yukon Denali

    I'm trying to diagnose an issue on my wife's Yukon. It's a 2013 Denali with the 6.2l, I have deleted the VVT and DOD quite a while ago, and did an engine refresh with a mild cam about a year ago, transmission was rebuilt about 3 years ago by a good local shop with upgraded parts including a...
  14. Hunter79764

    Silence

    I'd throw some turbo mufflers on at an exhaust shop. Not the greatest flow, but keep a good tone without being loud or obnoxious
  15. Hunter79764

    Container based shop: 2 post lift placement advice?

    As a G-Body guy myself... Ouch. Ouch... Yep, full frame but it is a floppy one, and the start of the wheel arch under the firewall was probably where they placed the arm (which is the proper jacking point). It is very easy to start slipping forward and have it do exactly like that, usually when...
  16. Hunter79764

    Oil change

    Unpopular opinion, but these days, synthetic is overrated for an older, stock engine. Run it in a race engine built for it, or in the newer daily drivers, and stretch the oil intervals out a bit. But an older truck? Stick with conventional, change it after 3k or a year, whichever is less. Wix or...
  17. Hunter79764

    Container based shop: 2 post lift placement advice?

    I'm late to the game, but my suggestion was to lay it out with paper dolls first, everything to scale, and see how that feels. With the actual container, you hit the nail on the head, drive a truck around and you will know pretty quick. See if you can get the footprint dimensions of the lift and...
  18. Hunter79764

    Need a Drivers side front diff/axle setup ....

    I think there's a few vendors, but these guys have popped up when I was looking at that option. https://hogbackfab.com/products/squarebody-super-60-swap-bracket-kit-1 You can buy the entire kit or piece together some stuff and fab some of your own etc.
  19. Hunter79764

    Need a Drivers side front diff/axle setup ....

    I believe the closest for "bolt in" is something like '79 Ford for a Dana 60, other earlier Ford axles should also be close tot he right spring perch width. 90's to 2004 Super Duty are all over the place and cheap, but the spring perches are in the wrong place and you will have a mini-project...
  20. Hunter79764

    Zero rates

    I'm still firmly on the learning curve, but I didn't realize push/pull could be used with hydro assist. Am I reading that right?
  21. Hunter79764

    Craigslist / Facebook/ OfferUp Finds: The Good, The Bad and The Ugly

    https://www.facebook.com/marketplace/item/1490612065817730/?ref=browse_tab&referral_code=marketplace_general&referral_story_type=general_listing&tracking=%7B%22qid%22%3A%22-7269421396938765100%22%2C%22mf_story_key%22%3A%223112257028881471264%22%2C%22top_level_post_id%22%3A%223112257028881471264%2...
  22. Hunter79764

    M122 blown 5.3 in my 99 silveraydo

    Love it when a plan comes together...
  23. Hunter79764

    8.1 vortec into 1979 k30

    This is why I want someone to do it and report back, I'm in a very similar boat... :happy160:
  24. Hunter79764

    Fitech force fuel pump

    I'm not completely sure, but when a buddy ran a similar setup (I believe it was FiTech, but an older version) the sump kit had a Holley float valve to keep the sump full of fuel. So if your mechanical pump has a return existing, I would try to keep it vs capping it off. And make sure the sump...
  25. Hunter79764

    hypothetical, mpg

    4BT Cummins and a 5 or 6 speed stick? Otherwise, the straight 6 with decent compression and either a 5 speed or the 700R4 seem like a good route. Agree that the rear end will not help you, even a semi float 14 bolt is fairly beefy, heavy, and power hungry.

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