I'm trying to think but nothings happening...
I have found from years of experience and research that usually the last thing you check is always the problem....... Glad you resolved the issue. I chased a wring issue on a fit motor for over a year. Th car would just shut down when idling in or through the paddock. Replaced a bunch of stuff and found out that I had a bad master switch...
School Of Curly, Moe and Larry
Master Switch Conact Issues
Quote:
Originally Posted by
DaveW
A combination of light contact pressure and a slight amount of contamination at the contacts could cause heat & resistance to increase just enough to kill the engine - you might be able to see voltage to the ECU decrease on your engine data.
Dave you hit it on the head. It had to be a build up of corrosion or a burnt contact area that would show resistance to the point that the engine would just shut off. We would cycle the master switch and then the car would magically start. We thought we were just cycling the ECU and it would reset and then work fine. We replaced the ECU with a new backup unit and the car fired right up so we buttoned it back up and rolled down to grid. Started the car again sat on grid for three minutes and the car just shut down. The crew member smacked the top of the master kill switch and the car immediately filed back up. Rolled out to the track and ran the entire race without issue. Was rolling back through the paddock and the car again just shut down. Contacted Pegasus and ordered a new master from them and never had an issues again. What I was told is that if you leave the master on for on for extended period of time that it will cause a hot spot on the contact and will end up doing the same thing all over again. I would suggest keeping a spare in your trailer just in case. It's a cheap fix and will keep you from spoiling your entire weekend. I spent many hours chasing an intermittent problem that could have been solved in a simple fifteen minute switch replacement. The problem was not the main terminals... it ended up being the two terminals under the switch that control the Z-Wires that send power to the coils.
Again its always the last thing you check Knuk Knuk Knuk