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I should add that before we started using our own controllers, we first purchased a MOTEC Controller (top of the line, and very expensive). I'd be driving along tuning it and all the sudden the screen would show 19,000 RPM and the engine would freak out. I was on the horn with East Coast and West Coast Support to no avail. We eventually pulled the MOTEC and installed a Link PC G2 I had laying around. It gave us the same issue. Out of desperation, I went with a MegaSquirt MS3.1, but alas, got the exact same issue.
It was around 8:12 AM on the last day of the event (July, 2010), I was sitting at the outdoor table sipping on morning coffee when it hit me...
The freak-out was caused by the Cam Position Sensor! It monitored the cam that twists (Variable Valve Timing stuff). When the factory ECU would change cam timing, the aftermarket ECU wouldn't know what to do with it. If I eliminated the CMS and controlled the engine as Batch Fire, all of those controllers would have worked.
By then we had already committed to using our own controllers.
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Recovering Gasaholic
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