Hi all ...any ford techs out here... i had a windstar in the shop few weeks ago , running on 5 cylinders , no spark on one cylinder (3.8 lite engine ).. but PC wouldn't set a missfire code , customer said its been like that for over 2 months , he fiduard it was do to having over 260,000 miles , but i found a bad plug wire on one cylinder ...so my question is why didn't the pc pick up the missfire and set a code ? what triggers a missfire code , i thought it was off the crank sensor , seeing RPM decrease ...when it should be an increase .... i know fords are slower at setting missfire codes than other manufactures but this was 2 months , guy drives alot , other fords with 4.6 and 5.4 with coil on plug pick up missfire faster with in minuets long minuets have had them take ove 5 mins to set a code , dodge i hate to say is way faster , any ideas ?
- posted
18 years ago