P030x misfire codes
11-19-2008, 08:17 PM
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blueoval427
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P030x misfire codes
Concerning the P0301 thru P0308 cylinder misfire OBD codes. What exactly turns these codes on. Possible causes in my mind are:
Low compression
Lack of combustion
No spark
What information I am seeking here is "What sensor or combination of sensors data does the computer digest to come up with a cylinder misfire. I just rebuilt a 1997 Ford Escort and after 50 miles got a P0304 code (#4 cylinder misfire). I hooked up the #4 plug wire and no more P0304. So.....How did the computer sense the misfire? The only sensors I am aware on the Escort head are the crank sensor (spark) and the cam sensor (not real sure what it does)? No big deal, JUST CURIOUS?
Low compression
Lack of combustion
No spark
What information I am seeking here is "What sensor or combination of sensors data does the computer digest to come up with a cylinder misfire. I just rebuilt a 1997 Ford Escort and after 50 miles got a P0304 code (#4 cylinder misfire). I hooked up the #4 plug wire and no more P0304. So.....How did the computer sense the misfire? The only sensors I am aware on the Escort head are the crank sensor (spark) and the cam sensor (not real sure what it does)? No big deal, JUST CURIOUS?
