Mine did the same. after buying new O2 sensors and a New MAF sensor.. I had to just drive the car for several hundred miles and the ECM will LEARN and adjust itself to work out the BUCKS thats what mine did I have a BIG CAMshaft anI cruise 35 in 5th gear now easily and even as low as 20mph turnin in places...
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SOLD THE 87GT, .. GT40, 70mmTB, 75mmBullet, 24lbinjectors, cold air induction, Edelbrok 6025 Rpm's, Inch phonolic spacer, tall FMSvalve covers, an SFI balancer, Canton 7quart, the shortblock... Lunati 51025 (224/232 .535/. 544 @112 deg) Ross lightweight pistons (10:1) Eagle H-Beams, Total Seal plasma Moly Rings, Clevite bearings, ARP throughout, FMS main Girdle&Studs, Forged Crank, of course HV-OilPump and hardened FMS shaft, Dual Friction centerforce, T5, and 4.10's Longtubes and 2.25 tail pi
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