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finally tgo is up...now i need help runnin rich

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Old Feb 4, 2005 | 08:36 PM
  #1  
porkyzilla's Avatar
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From: NOR CAL USA
Car: 89 iroc-z 5.7tpi 350,
Engine: 5.7tpi 350,
Transmission: T-56
finally tgo is up...now i need help runnin rich

well.....at my work i scanned the car.. tps voltage was good, and maf was right where its supposed to be, but the o2 sensor was low computer was saying it was lean and blm's were maxed out at 150

so i changed the o2 sensor and made a **** of a difference, also traded maf's with a friend witha brand new one no difference.

where do i begin fuelpressure is at 45psi and holds steady, its running so rich you can smell raw fuel out the exhaust also comming out of the exhaust

maybe related but i ran one bottle of nos in my car, a zex dry kit borrowed from a friend...
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Old Feb 5, 2005 | 12:13 AM
  #2  
Black 91 Z28's Avatar
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From: Starkville, MS
Car: 1991 Camaro Z28
Engine: 350
Transmission: 700R4
150 BLMs show that the computer thinks that it's ruinning lean. Yet you say it smells rich. Is there a chance that the new O2 is bad or that you have an exhaust leak before the O2. Sounds like the car is reading more air at the O2 and dumping more fuel in to compensate.
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Old Feb 5, 2005 | 12:31 AM
  #3  
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From: NOR CAL USA
Car: 89 iroc-z 5.7tpi 350,
Engine: 5.7tpi 350,
Transmission: T-56
Originally posted by Black 91 Z28
150 BLMs show that the computer thinks that it's ruinning lean. Yet you say it smells rich. Is there a chance that the new O2 is bad or that you have an exhaust leak before the O2. Sounds like the car is reading more air at the O2 and dumping more fuel in to compensate.

thats exactly whats happening... would it make a difference that i disconnected my muffler??? i have it hanging just took the clamp off so cats are still on...by the way i have stock multec injectors now
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Old Feb 5, 2005 | 12:34 AM
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Black 91 Z28's Avatar
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From: Starkville, MS
Car: 1991 Camaro Z28
Engine: 350
Transmission: 700R4
It shouldn't matter about the muffler.
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