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  • Location
    Plano, TX
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  • Drives
    2016 Yukon XL Denali

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wingsaa's Achievements


Enthusiast (4/11)



  1. Okay so I hooked it up like 'tyler.frost92' and everything worked fine and has really good brake vacuum. One thing I noticed immediately however when I was checking the brake pressure was that I went very lean in my LTFT. I'm not really sure why. All of my connections are tight and there is no vacuum leak. I was just testing so I didn't remove the belt from the pump and just left it running. I don't see how that could be causing an issue unless somehow it's allowing unmetered air in that way somehow. I also capped the mechanical vacuum pump as well and it really ran like crap then with throttle tip-in at idle. I swapped back the mechanical pump hose to the booster and the LTFT's went back to normal. So is that it? Do I need to remove the belt from the mechanical pump so it doesn't run and then cap the port? If that is the case I should be fine to remove the pump then and plug oil ports. Just wanted to test everything before physically removing the pump. Edited update Okay, I'm going to eat a bit of my own crow. Just a reminder to check and double check... and in my case, triple check connections. I must have had a leak at one of the connections. I retightened everything and all is good! I guess Monday's can be good after all. lol
  2. Yep. I've used it twice now and as you mentioned, just before I'm changing the oil. Get it out asap and in with fresh. I'm not saying that stuff doesn't work... I'm sure it does to some degree. I don't believe it gets to all the ports effectively however. That said, my next rodeo is to take the intake manifold off again sometime soon and clean the valves. I'll start with soaking with CRC and then cleaning and depending on the results may go ahead and walnut blast.
  3. Here's my input from a few months ago. Bought the truck new (2016) and have been running a "popular" catch can from around 2/300 miles in with AFM disabled from the day I got it home.
  4. Price update bump Sent from my SM-G988U1 using Tapatalk
  5. I have a brand new/unused HPFP GM 12697966. This is the updated and current part number from GM. $220 shipped.
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