Can you talk to your ECU?

[nando]

I had to plug my 173 in after my MS quit on me today. I pulled the TPS plug and cut power from the wideband. Ran like super crap and no power below 3k. Just wanted to post some info.

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I didn't mean that it would run *well*, just that those are the bare minimum requirements for it to run at all.

[ForcedFirebird]

I had to plug my 173 in after my MS quit on me today. I pulled the TPS plug and cut power from the wideband. Ran like super crap and no power below 3k. Just wanted to post some info.

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It will do that with no TPS signal since the ECU "thinks" it's always at partial throttle. Same thing happens when the WOT switch goes bad in them.

Are you using the IAT in the AFM for the MS, or did you wire in a GM sensor? For the Motronic to run properly, you would need to reverse all the modifications you did for MS. Nando was just saying it would "run" with those sensors.