got the code po304 but i dont know which is the #4 cylinder.
i need advice on how to find it
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1998 Ford F-150 Question: how to locate #4 cylinder
Answer #1csubak30 December 05, 2011, 12:44Master
hope this helps http://i469.photobucket.com/albums/rr60/klcdrive/78152984.gif
Order is : 13726548 Passenger side front to back is 1234 Driver side front to back is 5678
Replystormdancing, December 05, 2011, 14:36Rookie
i changed the #4 plug and boot but it made no diffrence .should i change the coil pack?????
i realy need suggestions
Answer #2euromech December 05, 2011, 15:50Journeyman
It could be the #4 fuel injector.I have seen once so bad injector that sprayed so mutch fuel into cylinder that caused a hydrolock that damaged(bent) the connection rod and cylinder lost some compression. Other shop changed all ignition parts and injector but car was still misssing.I checked compression ratio and find low compression in that cylinder.
ReplyPARTS GUY, December 05, 2011, 21:38Master
It's not a fuel injector. It's a bad coil. Let us not make this a doom and gloom problem.
Replyeuromech, December 06, 2011, 05:33Journeyman
Sorry but i am thinking as a mechanic and i assumed that you checked #4 cylinder for spark before assembly.