trwebb26 Posted September 24, 2006 Author Share Posted September 24, 2006 A little update on my problem: http://www.msdignition.com/forum/showthread.php?t=7518 Quote Link to comment Share on other sites More sharing options...
z-ya Posted September 25, 2006 Share Posted September 25, 2006 When it exhibits the problem, the waveform going from the MS to the MSD looks the same as when the engine is running OK? Why don't you use and HEI module or the VB921 to eliminate the MSD as a possible source of the problem? I have a feeling it is not the MSD, since you have tried two now. The MSD just fires the coil (yea, multiple times during that firing cycle) when the MS tells it to. It has no idistributor shaft rotation information. I think there is something with the firmware, or how the distributor pump shaft is timed. Quote Link to comment Share on other sites More sharing options...
trwebb26 Posted September 26, 2006 Author Share Posted September 26, 2006 I FINALLY got it figured out!!! I got the timing to act squirly - then uplugged the alternator. The problem went away! Time to clean up the alternator signal / or switch to a GM 1-wire! Quote Link to comment Share on other sites More sharing options...
z-ya Posted September 26, 2006 Share Posted September 26, 2006 You don't need a new alternator, you need to filter the noise that the alternator is creating. Chances are, a new GM alternator may exhibit the same problem. The problem is in the circuit the alternator is connected to. For some reason there is a resonant frequency. Try a capacity at the alternator. Let us know what configuration fixes the problem. Quote Link to comment Share on other sites More sharing options...
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