Hello,
I have a yukon that wont run right when a load is placed on the motor. The installer/tuner has been stumped for many months now. We cant seem to figure out what is going on. When the car is park it revs fine to the limiter. But when you drive it, it runs horrible. I personally haven't driven it but the shop says that the tune seems fine. I had them send me a log and the config file to post here to ask for some help. Could someone please take a look at the tune and log and see if there is something wrong with the tune.
They say it revs fine in park, but when you drive it it acts like the computer is taking out timing or something at around 2500 rpms or as soon as boost comes on then it is very hesitant till around 4500 then it starts to take off again.
Tuner said that they have exhausted everything to try to get my truck running but it has been 6 months now and I have no truck. Said they checked it with wideband and cant find anything wrong with the tune.
Specs on the truck.
rebuilt lq4 block
799 heads
ls6 cam and springs
on 3 turbo kit fmic
Garret gt4094r turbo a/r .95 (I think)
FAST truck intake manifold
Fast fuel rails
Walbro pump
Aeromotive regulator
Injector dynamics ID 750
BBK dbw t body
MAD DOG level 3 4l60e
2000 yukon slt
2WD
Drive by wire
traction control
Truck ran and drove perfect when I dropped it off in October.
Now the fuel guage is at the 6 oclock position, and I noticed the tack wasnt working then it kicked on after about 30 seconds.
I would happily pay someone for their time if they can solve this issue.
Any other info needed please let me know.
Thanks