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dap930 dap930 is online now
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Join Date: Dec 2011
Location: Virginia Beach, VA
Posts: 419
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gavin,

I did look at your datalog on the MS2 forum. Every time the engine misses (RPM sudden drop) the commanded injector pulsewidth does not change, meaning that MS is still injecting when the engine stumbles. That leads me to believe that your ignition system is having a hiccup at that point. It does it while the engine is decelerating as well, but you do not feel that. Looking at "status 1", it is "8 status" which is RPM Synced until the first big miss, then it jumps to "9" which indicates the CPU needs a burn (1 status, added to 8 status = 9). I have no idea why that happened.

Injector duty cycle is well over 100% in the 4000+RPM range when on boost, so that will get worse when getting to redline. Definitely will need larger injectors.
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-Dennis
1977 930 Slant, MS3 EFI, Carrera intake, Twin plug, Powerhaus headers, Magnaflow muffler, Garretson intercooler, GTX3071R
Old 01-27-2017, 01:52 PM
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