I checked my TPS alst night and it was at .539 Volts at idle. I can't seem to figure out why I'm running so rich. Yeah I have done some major changes to the induction system and cam but I always thought the the fuel injection system would compensate for the rich/lean conditions. My O2 voltage is .65-.78 volts at Idle. So i know that it is working properly. And the only code I'm throwing is a 32 and that's because i plugged the EGR vacuum line becasue My intake soesn't have a EGR port. Thanks for your help Y'all.

Later
Lars

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'92 RS 305 TBI
K&N Open Element
Ultimate TBI mod's (thanks Pablo)
Cam[.442"/.465" x 218*/224* @ .050", 10:1 Hypereutectic Pistons
Performer Manifold
Shift Kit, Corvette servo,
and 2800 Stall Trans Specialties Converter,
Gutted Cat, IAT Resistor
MSD Blaster Coil, Accel Cap and Rotor

 

what's your fuel pressure at and what size injectors do you have? The pressure may be set too high.

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1988 TA 300+hp 350 w/ TBI and Holley TB unit,
WC T-5, 3.42 gears w/ Auburn posi. MSD 6A, edelbrock TES headers, dynomax 3" cat and cat-back system, ACCEL coil, polyurethane bushings all around, aluminum driveshaft, Mr. Gasket open air cleaner.

1993 S-10 w/ 4.3L V6 TBI, slightly bigger cam, Mild polish job and 3 angle valve job on heads, Edlebrock TES headers, Dynomax cat back, MSD 6A, ADS chip
(bought from my dad)

2000 GMC Sierra Regular Cab Stepside
285hp 5.3L w/ 3.42 gears and locking diff. (sold to my dad..no!!)

 

Stock injectors, fuel pressure is prolly just a little less than stock. Any ideas?

thanks,
Lars

 

im surprised there isnt raw fuel coming out of the exhaust pipes wit hthat cam

Your idle vacuum is telling the computer the motor is under acceleration had it still been stock and is adding fuel accordingly while you sit there idling

you need a custom chip, no ifs ands or buts, the tps adjustment wont change a thing except keep you out of WOT since its so low

believe me i have a cam wit hjust about the same specs and it ran very rich until i started doing my own chips and adjusted for it. I can also guarantee you are WAY down on power. If yo uwant any tips on it, i can help you out alot actually since our combos are so similar, and mine is runing GREAT now

 

Thanks Pablo. I was hoping it might have been an easy fix or something like that. I guess a custom chip is a little out of the question at this point in the year. I'm taking it home next weekend. for the winter. I plan on getting the custom chip hardware this winter and doing research on what i need to change in the chip. I will be in contact with you in the future regarding the chip burning tips. But prolly on the PROM board. Thanks again

Thanks,
Lars