Join Date: Feb 2010
Posts: 3

Classifieds Rating: (0)

Fast XFI 1999 Tahoe help!
Seems like you guys are my best shot at some help
I built a 406 sbc 550hp for another project and decided when my daily driver threw a rod id put in that. The 99 tahoe already has a 1 ton 14 bolt and 3k in the trans to more then handle the motor. Problem is I cant get the original computer to control the trans I have jet dst heres the motor specs

Fast XFI
105mm holley throttle body
edlebrock 105mm elbow
super victor efi intake
fully cnced aluminum profilers
full roller 520 540 110 lobe sep
fully forged bottom end
10.2 to 1 comp
have a nx lightning kit for possibly a 100 shot

 

right now the original computer is getting tps vss oil press. coolant temp. Im getting the typical evap egr codes but also a p0340 cam position circuit malfunction since there is no cam sensor to plug into Im also reading low tps voltage. The trans seems to be in limp mode not sure. It was driving a few days ago just needed to be tuned better I set the jet tune back to stock on the trans for engine test/driveability tune on the fast system. Then all of a sudden leaving a stop light it would not upshift seems to only have 1st and reverse may be second cant tell as it doesnt bog down. Please tell me somebody has run into this problem before I have 13k in this mess not including rear trans and truck so id like to stay away from the tci trans controller or a th400