christopherbecker1
Crown Victoria rough engine cylinder misfire
Summary of the thread
The 2002 Ford Crown Victoria was experiencing rough engine performance, jerking during acceleration, and a loss of power, with the check engine light on. These symptoms suggested a possible cylinder misfire, potentially due to old spark plugs or a defective fuel injector. After taking the car to a workshop, a defective fuel injector was confirmed as the cause, and the issue was resolved, restoring smooth engine operation.
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4 comment(s)
christopherbecker1 (community.author)
I don't know the error code, haven't checked it. Spark plugs haven't been changed recently. The engine runs rough at idle, and it gets worse when accelerating. I'm using regular gasoline.
nicomayer45
Regular gasoline should be fine. If it's rough at idle and gets worse when you accelerate, and you haven't changed the plugs in a while, that's suspect. But if the check engine light is on and you are seeing error codes related to combustion misfires, the problem is probably related to the injection valve/injector of the affected cylinder. Honestly, sounds like you should get it to a workshop. They'll be able to diagnose the exact cause and fix it properly. Agree?
christopherbecker1 (community.author)
Took the car to a workshop as suggested. Diagnosis confirmed a defective fuel injector, and the repair cost 515€. The car runs smoothly again now. Thanks for pointing me in the right direction.
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FORD
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CROWNVICTORIA
nicomayer45
Rough engine and check engine light, huh? Sounds familiar. Cylinder misfire, you say? Did you check the error code? It usually tells you which cylinder is acting up. How old are your spark plugs? Old plugs can definitely cause misfires. Is it just rough at idle, or does it get worse when you accelerate? What kind of fuel are you using?