[rowingone]

So just finishing my 1972 2.4 MFI and admittedly I have spent a fair amount of time in the garage at under 2k rpms as I work thru CMA and noticed that the plugs become black and the car won't start easily. The MFI pump was just tested, cleaned , calibrated by Mark Jung so I am good there . . my question is the plug I run is the NKG 7es and I am at 5280 feet of altitude .. should I try a hotter plug or will my problems disappear when I start to drive it on the street? The car runs great until it doesn't and then a quick clean of the plugs will bring it back to normal.