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racprops · 10-24-2011, 04:37 PM

My 2000 GM does that as well. 29/30 hiway all day long.

Sadly all that I have tried to make it do more has failed, hydro, fuel vapor, messing with the PCM..tuneing it for 27: 1 air/fuel all failed to make a dent..29/30 every time..

Rich

10-24-2011, 04:37 PM	#2 (permalink)
racprops Master EcoModder Join Date: Oct 2009 Location: Phoenix AZ Posts: 799 Thanks: 4 Thanked 66 Times in 58 Posts	My 2000 GM does that as well. 29/30 hiway all day long. Sadly all that I have tried to make it do more has failed, hydro, fuel vapor, messing with the PCM..tuneing it for 27: 1 air/fuel all failed to make a dent..29/30 every time.. Rich