Random irratic rpm signals cause huge lean spikes

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Random irratic rpm signals cause huge lean spikes

Postby TTC » Sat Jun 23, 2012 6:20 am

ms1 v3.0 EDIS hi res code 4age turbo

For whatever reason out of the blue I started getting random backfires, bucking and "fuel cuts". At first I thought maybe it was a fueling issue but after looking at the logs you will notice that there is a random rpm drop, it goes to the lean point of the map and then hilarity insues. This for the most part cost me an entire race day, i was bummed.

If you look through the map you will see the event followed by a wack of tps spikes, that was just so I could mark them on the log. Ignore the spikes afterwards in tps.

Since im using EDIS would I just start with the pip/saw connections from the edis unit to my ms? Bah, log is to large since it was a 15minute session. I can email it.

Image
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Re: Random irratic rpm signals cause huge lean spikes

Postby Matt Cramer » Mon Jun 25, 2012 5:53 am

Yes, I'd check the connections, and if the PIP signal isn't shielded, shield it.
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Re: Random irratic rpm signals cause huge lean spikes

Postby TTC » Sun Jul 15, 2012 3:12 pm

Rewired all ign pip saw componets, seems like it might still be there. I've had my MS for al oooong time, maybe 6 years. Is it possible a compents jus tworn?
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Re: Random irratic rpm signals cause huge lean spikes

Postby BMW528e » Sun Jul 15, 2012 9:18 pm

Could it be a problem with the EDIS unit or VR sensor? Do you have a tachometer that is triggered by EDIS and does it show the RPM drop at the same time as the MS log?
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Re: Random irratic rpm signals cause huge lean spikes

Postby TTC » Mon Jul 16, 2012 5:33 am

The tach is run by the coils, the problem is that the tach I use only starts at 5500 rpm lol. Honestly I've given MS a good go, we had some good times and its been pretty reliable. But now its costing me track time and $$$. I'm not sure what im going to do, if I shoudl finally upgrade to ms3 or just go link/haltech
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Re: Random irratic rpm signals cause huge lean spikes

Postby Matt Cramer » Mon Jul 16, 2012 10:33 am

BMW528e wrote:Could it be a problem with the EDIS unit or VR sensor? Do you have a tachometer that is triggered by EDIS and does it show the RPM drop at the same time as the MS log?


I'd probably try changing the sensor first, followed by the module.
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Re: Random irratic rpm signals cause huge lean spikes

Postby TTC » Mon Jul 16, 2012 2:36 pm

If I find one at the yard I may try that for shits.
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