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NorthernThrux NorthernThrux is offline
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Join Date: Jun 2012
Location: Ontario, Canada
Posts: 114
MFI always runs best rich, and if you don’t get into the high rpm range, odds are you will foul your plugs. So try exercising the car first and see what happens with the plugs before you go to a hotter plug.

You cannot truely calibrate the pump,without it being on an engine dyno. Mark would have set it up for the “average” 2.4. That should get you close, but ideally put an AFR onto one of the heat exchangers and see where you actually stand. If running rich, in combination with your 2k limit, upu could really be fouling the plugs.

Lee Rice has a quick test for richness in his MFI primer, available in pdf form on this forum. Just disconnect the MFI pump linkage and push it slightly (throttle valves at idle) and watch the rpms go up and then down as he says.

Ravi
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