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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

85 f150 4.9 missing

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Old Dec 14, 2010 | 12:18 AM
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w dog 7.wv
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85 f150 4.9 missing
my 85 started missing friday on the way home from work. intermitent .so over weekend changed plugs ran fine till i was 30 miles in to my trip to work yesterday. seams to start missing after 30 miles do any of you gurus have any ideas ? i believe the square coil may be breaking down when it gets warm .or maybe the magnettic pick up in coil any ideas would be appreciated thanks .
 
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Old Dec 14, 2010 | 08:54 AM
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Pull the plugs again and look at them. If one of them is fouled, that's your miss. Could be oil or coolant fouling the plug.
 
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Old Dec 14, 2010 | 05:55 PM
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problem solved
the magnetic pick up on and in the distributor was advancing the timing and retarding sporatically . with no or little load on engine thank you .
 
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