I have a misfire , especially on cold mornings The misfire is worst it gets better when the engine warms up tho . But I'll be driving on the highway and I can feel the random misfire, that aren't so bad but I can feel them .. and it gives a code p1399 . Ive changed the spark plugs, wires , and a 02 sensor . What else do I do? Or replaces?
My car has 158984 miles.
My car has a manual transmission.
|Fuel Injector Replacement||$400.56 - $3968.30||Get a Quote|
|Fuel Pump Replacement||$145.32 - $1299.70||Get a Quote|
|Fuel Pressure Regulator Replacement||$126.81 - $1011.90||Get a Quote|
|Spark Plugs Replacement||$113.11 - $716.47||Get a Quote|
|Ignition Cable (Spark plug wires) Replacement||$123.29 - $510.40||Get a Quote|
|Ignition Coil Replacement||$132.12 - $587.62||Get a Quote|
|Engine is misfiring Inspection||$94.99 - $114.99||Get a Quote|
Hello. A random misfire can be caused by many different things such as dirty fuel injectors, a weak fuel pump, a bad fuel pressure regulator, fouled spark plugs or wires, a failing ignition coil or a vacuum leak. To get a more precise diagnosis, I would recommend having a certified professional, like one from YourMechanic, inspect the misfiring problem firsthand so that this can be corrected properly.
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