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MattGSR
PostPosted: Fri May 07, 2010 11:12 am 
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Joined: Fri Jan 09, 2004 4:08 am
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Location: Hayward, CA
So the ecu i swapped in there was MD166260 which from searching the web looks like it is a 91+ecu. I have a MD128623 which i believe is a 90ecu. i'll try this and drive it around later when i wake up, need my zzzzz after working 12hrs last night.

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CaptainTonus
PostPosted: Fri May 07, 2010 12:09 pm 
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Location: San Diego, CA.
Should fix your problem.

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91 GSX - 511fwhp and 352 lb/ft 25psi 110 octane, 7.68 @ 95.9mph 1/8th 21psi 91 octane, 11.93 @ 112.9mph, 117.7mph best trap speed, 20psi 91 octane
98 Volvo S70 T5 - DD

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pma1123
PostPosted: Thu May 13, 2010 10:20 am 
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Joined: Sat Feb 01, 2003 1:54 pm
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Location: Watertown, WI
I had a very jumpy tach when I swapped to COP. 90 ECU or 91-94 ECU w/90 filter didn't seem to matter. I went back to coil pack and wires, no issues...
Wonder if a capacitor in the tach signal wire would help?
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