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||$379.42 - $3631.88||Get a Quote|
|Fuel Pump Replacement||$120.92 - $1186.72||Get a Quote|
|Fuel Pressure Regulator Replacement||$111.64 - $903.72||Get a Quote|
|Spark Plugs Replacement||$96.63 - $636.71||Get a Quote|
|Ignition Cable (Spark plug wires) Replacement||$108.29 - $457.90||Get a Quote|
|Ignition Coil Replacement||$116.03 - $516.36||Get a Quote|
|Engine is misfiring Inspection||$79.99 - $89.99||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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