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Re: Spark Advance Program, 1994 GM 4.3 Vortec
Posted to Technical Discussion Forum on 3/5/2007

Thanks for all The responses Guys, Just so you know the EGR Actual Position is 0 % and The Valve was changed. It does act Just like the a valve that would be open 10%..Just a slight stumble rough Idle...

Today I noticed if I increased RPM to about 800 or Ove... Login to read more.