1999 F 250 Misfire HELP!!!!!
#1
1999 F 250 Misfire HELP!!!!!
I have recently bought a 1999 F 250 with a 5.4 and am having trouble with a misfire issue. I have passed emissions with no problems and have no current check engine light on. I ran the stored codes and found cylinder number five and six in the memory showing a misfire. After checking the plugs and boots I found the plugs in good shape and boots falling apart. I replaced the boots and had no results. All eight of the coil packs have been replace by the previous owner. What do I check now?????
#2
A code P0305/P0306 may mean that one or more of the following has happened:
Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Poor compression
Defective computer
Faulty spark plug or wire
Faulty coil (pack)
Faulty oxygen sensor(s)
Faulty fuel injector
Burned exhaust valve
Faulty catalytic converter(s)
Poor compression
Defective computer
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