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Author Topic: 03 Miata - Rich spike cant tune out  (Read 78 times)
Mikeymx5
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« on: February 05, 2010, 09:12:02 AM »
So I have had this problem from the day i installed the FIC.

At almost exactly 3000 RPM the car will suddenly spike rich. Its quick but you can see it every time on the wide band, and the ECU fuel trims if you are watching them.

I cannot find an explanation for this problem and tuning the FIC doesn't do anything..

All my LT fuel trims are now with in 2% but the problem continues. Could this be a hardware defect in the FIC?

2003 Miata LS 1.8
T2554 turbo
550cc injectors
MAF is not connected to the FIC.
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Miata: 2003 (Sunburst Yellow), BEGI S2 T2554@11psi, AEM FIC, 550CC RC Injectors, FM Dual Turbo Exhaust. 1/4mile 13.3 @ 105mph.
dbrummet
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« Reply #1 on: February 05, 2010, 12:30:02 PM »
Can you attach a log of this, also what hex are you running?
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