I have a 2004 Ford F-150 4.6L my check engine light is on and when code scanned it says multiple mis fires in the number two cylinder. I have changed the spark plugs, put a new coil in and a new fuel injector all on the number two cylinder. I am still getting the same error message and the vehicle runs ruff a idle and at steady speeds. what could still be the problem.
Country: United StatesMake: FordModel: F-150 LariatYear: 2004Engine: 4.6L
Spark plugs, coil, and new fuel injector.
Hello!My name is XXXXX XXXXX X can assist you with your question.Does the engine run ok during acceleration? Does the check engine light flash when driving at times?Do you have access to a scanner that can read live data?
yes it seems like it drives fine on acceleration. yes usually during rapid acceleration. runs rough when running at a constant speed. No i do not have access to a scanner that reads live data. did have a friend scan it for me and he said the scanner said multiple mis fires from the number 2 cillinder.
Honestly, the most common problem that would cause an engine to misfire under a load would be the spark plug and ignition coil. But if those were replaced, we will need to look at other possible causes. Just keep in mind, it is possible for the new plug and coil to be bad. It does happen from time to time.If the cat was plugged on one side, then that could cause cause one or all cylinders on that bank to misfire under a load. You are also going to want to check to see if the intake manifold gaskets are leaking. This usually only causes misfire at idle when the vacuum is at its highest point... but just for grins check it anyway.Even if there are no other codes in the computer besides this code, there could be other cylinders that are misfiring that may be a result of underling problem that is only causing cylinder two to misfire. A good way to check to see if other cylinders are misfiring but not setting a code in the computer is by using mode 6. Access mode $06 through the Generic side of the scan tool and enter Test Identification (TID) 53 to inspect the misfire count value of all cylinders referencing the P0300 and p0316 codes. Test 53 is the misfire test. TIDS and CIDS for test ID and Component ID. The component is 1 through 8 indicating cylinders 1 through 8. The screen will display limits and value. From there you can see which cylinder is misfiring and how often it is misfiring.AMEDEE41036.1212065625
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do u think its a posibility that it could be a catalitic converter or a blown valve
Hello!Sorry for the delay! YES.. it could very well be either a plugged cat or a mechanical issue with the motor and or specific to cylinder number 2