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herbieS13 · 12-13-2010, 01:46 PM

I have a s13 sr swap w/ power fc d-jetro, the stock tach and the RPM reading off the pfc commander is off by as much as 1000rpm in higher RPMs idle - roughly 2000rpm stock tach and pfc readings match but anything past that the readings off the commander are roughly 500 rpm higher until 5000-5500 then it climbs to as much as 1000 higher than the stock tach, is there any fix to this? Or should I start shopping for a new tach?

edit:::
i have an s13, 89'

12-13-2010, 01:46 PM	#1
herbieS13 Zilvia Junkie Join Date: Nov 2008 Location: FT Campbell, KY. Posts: 329 Trader Rating: (2)	Stock Tach is not reading correct RPM I have a s13 sr swap w/ power fc d-jetro, the stock tach and the RPM reading off the pfc commander is off by as much as 1000rpm in higher RPMs idle - roughly 2000rpm stock tach and pfc readings match but anything past that the readings off the commander are roughly 500 rpm higher until 5000-5500 then it climbs to as much as 1000 higher than the stock tach, is there any fix to this? Or should I start shopping for a new tach? edit::: i have an s13, 89' Last edited by herbieS13; 12-13-2010 at 04:19 PM..