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8upZR1 · 07-26-2007

I have two ECU's and three chips but no combo seems to solve the issue. There are some noticeable driving differences between the chips as there should be but nothing significant. I drove a little with the pins jumped and it didn't make a difference. I am going to look into one of these scanners. Maybe that will lead to some insight. I did a quick diagnostic with a voltmeter of the ignition module test port and everything seems ok. An oscilloscope would probably be the better test equipment but I do not have one. The Ref high, ref low, EST out, tach out, bypass line all look good before and after cranking.

07-26-2007	#16
8upZR1 Join Date: Jun 2006 Location: Thunderbolt, Ga. Posts: 253	Re: A serious problem I have two ECU's and three chips but no combo seems to solve the issue. There are some noticeable driving differences between the chips as there should be but nothing significant. I drove a little with the pins jumped and it didn't make a difference. I am going to look into one of these scanners. Maybe that will lead to some insight. I did a quick diagnostic with a voltmeter of the ignition module test port and everything seems ok. An oscilloscope would probably be the better test equipment but I do not have one. The Ref high, ref low, EST out, tach out, bypass line all look good before and after cranking.