Low end flat spot
 

I've got a pretty bad flat spot at the low end. The car idles at about 900 and drives well once your up in the rpm's a little bit. Any thoughts?

Scan tool reads the car is going lean

I take it you are using a chip.. a little detail please..

Is this a tip in problem, or after that? If in the lower end is acceleration enrichment coming in, or Power enrichment not coming in early enough? TPS flat spot maybe?

Turbo tweak chip with 79 lbs injectors 3 1/2 inch MAF car runs super after initial start. If you leave with a heavy foot its fine, but, if your just "driving" it falls on its face then takes off at about 2000 rpm's.

TPS is .48 idle and 4.6 wot.

Where is your IAC counts at idle.. you may lower them down to 5-15 counts at idle by opening your throttle blade a little, that may help.... after that.. looks like a FAST XFI.... will take care of ALLLL YOUR ISSUES.. :D

Boy O boy! I knew that one was coming! Thanks for the "quick fix" remedy. How much for all I'd need? (FAST) Also, are they pretty easy to learn? There is only one other Turbo Buick guy here so kinda tough to get competent help out here! Thanks for the turbo though! I LOVE IT!!!!!!! Once the little tweaks are done....:D:D

Hehehe.. couldn't resist it, anytime I see a big turbo and a lot of other good parts..... seems the best form of tuning and performance is the FAST. Chips, big injectors are like water and oil to me. But I will try to help any way I can. I meant it about the IAC counts. If it is an off idle hesitation... we usually work the min idle screw and open the throttle blade till our idle IAC counts are around 10, give or take a few.. then reset the TPS to spec, around 42-46.. after that, if everything else checks out, maybe Eric at TT can work some magic.. on the chip.

Oh ya.. I forget who this is...? I know I should know, short memory... just turned 55..:)