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Silent Z · 09-28-2005, 04:34 PM

Well again I was wrong this is happening way to often. The timing still retards when at operating temp. I used the snap-on vantage scan tool and my IAC and MAF are fine, but I did these tests while engine was cold. Should I do these tests while it's hot? I know it was a waste but I have replaced the Throttle position sensor, MAP sensor, Knock Module, and Air Intake Temp. sensor I am at a loss. I know when I it fixed I will have no worries becasue its all new. Is there a way to test the PCM? I would hate to replace the PCM or Opti Spark and find out they were fine because those items are not cheap. All of the stuff I replaced sensor wise only cost about $100.00 so I have not spent a fortune. I have a new MSD coil on the way! Any ideas?

09-28-2005, 04:34 PM	#16
Silent Z Join Date: Sep 2005 Location: Charlotte, NC Posts: 119 iTrader: (0)	Well again I was wrong this is happening way to often. The timing still retards when at operating temp. I used the snap-on vantage scan tool and my IAC and MAF are fine, but I did these tests while engine was cold. Should I do these tests while it's hot? I know it was a waste but I have replaced the Throttle position sensor, MAP sensor, Knock Module, and Air Intake Temp. sensor I am at a loss. I know when I it fixed I will have no worries becasue its all new. Is there a way to test the PCM? I would hate to replace the PCM or Opti Spark and find out they were fine because those items are not cheap. All of the stuff I replaced sensor wise only cost about $100.00 so I have not spent a fortune. I have a new MSD coil on the way! Any ideas? __________________ 1994 Z-28, A4, T-Tops, Trick Flow/Lingenfelter CAI, Air Foil, Underdrive pullies, FlowMaster Cat back, LT4 Knock Module, MSD 8.5 wires, Cap & rotor, 6A box, Hyper-Tech 160 T-Stat, T/B bypass, Optima Red Top Batt. , And Meziere electric water pump!