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clean71 · 08-17-2005, 08:18 PM

My understanding (and I could very well be wrong) was that if the ECU/PCM is throwing codes related to o2 sensors, it can/will retard timing and therefore affect performance.

What you are saying then, is that if the ECU/PCU is reprogrammed correctly, the o2 simulators are not needed. "Correctly" being the key term.
Nice truck BTW.

08-17-2005, 08:18 PM	#46
clean71 Registered User Join Date: Aug 2002 Location: San Diego, CA Posts: 335	My understanding (and I could very well be wrong) was that if the ECU/PCM is throwing codes related to o2 sensors, it can/will retard timing and therefore affect performance. What you are saying then, is that if the ECU/PCU is reprogrammed correctly, the o2 simulators are not needed. "Correctly" being the key term. Nice truck BTW. __________________ CPO U.S. Navy(Ret) 1972 GMC Jimmy 4x4 Custom 1972 GMC Jimmy 2x4 Custom Last edited by clean71; 08-17-2005 at 08:20 PM. Reason: add