Help!!

[Ed Wright]

Originally Posted by buzzinhalfdozen

Ed, I'll assume from the business you're in you have a DVOM? Hook it to the power supply circuit for your MSD or FAST unit, most have a record function to record high, low and average voltage set it to 1ms record speed and make a lap. If all looks well there, hook up to your crk. sensor circuit, also record set to AC voltage and monitor, a sudden change here would indicate an issue. Hoe are your Ign. components powered/ Relay, direct from switch? I have seen relays cut on and off due to points bounce, What sample rate does you datalogger have? Sorry for all the questions, just intrigued by the problem. Joe

Joe, I have a Fluke DVOM, and a Fluke 98A digital lab 'scope. Both will record, the 'scope has a faster capture rate than the meter. May have to make some passes with one of them connected. It's usually off close to 1/10th of a second. Don't know the sample rate for the FAST data logger. Need to check that.
I did replace those power wires to the FAST ECU and MSD box and the ignition switch Saturday. May have fixed it. Need to test again this week. I'm wearing it out chasing this down. Eight passes Friday, and accomplished nothing. I do know what it isn't. <G>
Thanks, Ed