TPI Tuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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Old Nov 10, 2002 | 09:30 PM
  #1  
orangeroc383's Avatar
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Joined: Jun 2001
Posts: 86
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From: Stow, OH USA
Car: 1986 IROC-Z
Engine: 383
Transmission: th350
hesitation

I have been getting a hesitation when I stab the throttle on my 85 IROC. It seems to hesistate less after I have been driving it
for awhile. I have a 383 with superram and a paxton supercharger. The car is a MAF car. any ideas? I have been messing with the tps voltage but, can't seem to get it to stop hesitating.
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Old Nov 11, 2002 | 01:43 PM
  #2  
dd85T/A's Avatar
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Joined: Nov 2001
Posts: 208
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From: Billerica, MA
Car: 85 T/A
Engine: 350 TPI
Transmission: T5
I had a the same kind of problem. It was kind of a lag between hitting the gas and taking off. It turned out to be my fuel pump was about to die. I replaced the pump and the problem went away. Have you checked your fp? Good luck.
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