bgiovan
New Member
Finally got the new ATT and KOJO installed on my 97 K2500 Suburban (181,000mi). Asked for a tow tune since we're pulling a 30' travel trailer when loaded is 9,000lbs+-.
Driving 4 hours north tomorrow with SWMBO and the kiddos to finish a camping trip in northern MI we began a week ago. I left the trailer up so we are rolling up "empty" and will be towing back next weekend. Some pretty decent grades to look forward to and given how poorly the stock set up dealt with the grades, I'm looking forward to seeing how this investment pans out.
Today was >100F and my first highway run this evening was for about an hour - the outside temp was still 90F. Relatively flat. Off the line, didn't notice too much differnce vs. the GM8 but boost was very impressive at rolling acceleration from say 45 up. Damn thing seems to never run out of steam all the way up to 90 when I chickened out in fear of a ticket. There was some pump diesel in the tank but I filled up tonight with homebrew B100 so I was running B90. Truck has the Feed The Beast mod and PMD Cable's OPS mod also.
The only concern I have is a few times it felt fuel starved when accelerating up a hill, especially from say a 25MPH rolling start and flooring it. Fishbit badly, like the fuel filter was clogged but I just changed it last week. Kinda worried that once I attach the trailer, I'm going to have this even worse pulling grade. I have the "HD" lift pump from SS Diesel (I know). I have a Walbro FRB5 waiting to install.
Is this a sign of fuel starvation? Also, seems like I have way more engine braking when I let off the throttle than before. Very noticable.
I didn't have time to do the install myself and had a local mechanic do it for me. They talked on the phone several times with the ATT King today so I know they had good leadership.
One other piece of intel, I also had them install a glow plug harness upgrade for me. The old set-up was a hack job by the previous owner and the tidied it up. But when I picked the truck up tonight my fuel gauge is pegged at 3 o'clock. Something happened with the ground on that and it needs to get addressed.
Rolling along on the freeway and nailing it, very impressive. Very impressive. This fishbiting is new though and needs to get dealt with.
Any input appreciated.
Thanks!
Driving 4 hours north tomorrow with SWMBO and the kiddos to finish a camping trip in northern MI we began a week ago. I left the trailer up so we are rolling up "empty" and will be towing back next weekend. Some pretty decent grades to look forward to and given how poorly the stock set up dealt with the grades, I'm looking forward to seeing how this investment pans out.
Today was >100F and my first highway run this evening was for about an hour - the outside temp was still 90F. Relatively flat. Off the line, didn't notice too much differnce vs. the GM8 but boost was very impressive at rolling acceleration from say 45 up. Damn thing seems to never run out of steam all the way up to 90 when I chickened out in fear of a ticket. There was some pump diesel in the tank but I filled up tonight with homebrew B100 so I was running B90. Truck has the Feed The Beast mod and PMD Cable's OPS mod also.
The only concern I have is a few times it felt fuel starved when accelerating up a hill, especially from say a 25MPH rolling start and flooring it. Fishbit badly, like the fuel filter was clogged but I just changed it last week. Kinda worried that once I attach the trailer, I'm going to have this even worse pulling grade. I have the "HD" lift pump from SS Diesel (I know). I have a Walbro FRB5 waiting to install.
Is this a sign of fuel starvation? Also, seems like I have way more engine braking when I let off the throttle than before. Very noticable.
I didn't have time to do the install myself and had a local mechanic do it for me. They talked on the phone several times with the ATT King today so I know they had good leadership.
One other piece of intel, I also had them install a glow plug harness upgrade for me. The old set-up was a hack job by the previous owner and the tidied it up. But when I picked the truck up tonight my fuel gauge is pegged at 3 o'clock. Something happened with the ground on that and it needs to get addressed.
Rolling along on the freeway and nailing it, very impressive. Very impressive. This fishbiting is new though and needs to get dealt with.
Any input appreciated.
Thanks!
