I have a 532ci motor and I'm trying to get it to run better during warmer temps. The engine is in a 79 f150 and it doesn't get driven much. In the winter it run real good except for when I shut it off it has some run on before it kills but not much. In the summer it has terrible run on and almost wont shut off. It has a performer intake with an edelbrock 850 thunder series on top. I have msd ignition and have it timed at about 8 degree on idle with a what I think is a 10 degree limiter bushing. The thing seems like it wants to ping at anything over 10 in the limiter bushing. In temps 30-40 degrees the thing runs great at wide open. In 70 degree weather it will take off decent but decides to stall out during a shift in the auto trans and I have to get out of the throttle to get it to come back. I've tried cooler running plugs which seem to help the run on issue but they come out dark black like it's too rich. I put the normal plugs back in and I can't tell by the color if it's just right or too lean. I'll try and add a pic of the normal plugs. I'm kind of stumped as to why cool temps make it run better. Maybe I need more initial timing and lock the advance out? Any help would be great.
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