Skip the auto shop - Our mechanics make house calls

Q: cylinder misfire

asked by on

code p0300. when excelerating around 40 mph stabiltiytrak and traction control lights come on and engine light blinks. i have checked coils all good. will replace spark plugs. there is a tick in the engine. guessing lifters. catylatic converter code is present and needs to be replaced but is secondary issue to misfires.

last winter, issue with oil pressure when cold start. after truck warmed up no issues. (even got oil pressure low warning) come summer everything is fine. but now dealing with the above issues.

many mechanics have suggested many problems from oil pump to new engine. truck still runs but not good enough for above 40 mph.

My car has 165000 miles.
My car has an automatic transmission.

There seems to be a variety of symptoms going on at the same time. Addressing the ticking issue, it could be your lifters, and it could also be your fuel injectors. This could be part of the problem when it comes to the misfire code you are receiving. If the injector is clogged the lack of fuel available for combustion will cause a misfire. The catalytic converter can also cause similar issues. The O2 sensors have failed You should have dressed Fuel and air first when diagnosing these issues. When it comes to poor oil pressure, and oil pump is one of the first places to check. During winter months, make sure you are using the correct viscosity of oil for your vehicle.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Brakes not pumping up.

The best thing to do with a new master cylinder is to bench bleed it. Here's how: You use a vice to grab the nubs of the master cylinder and mount it up about waist high. If you don't...

Q: Cooling fan malfunction

Hello there. The cooling fan running when the vehicle is shut off for this vehicle is fairly common. In some cases the cooling fan will run when the vehicle is turned off to continue to cool it down for a...

Q: Misfiring on a 2003 Audi A4 3.0

You've got to replace the cover gasket valve that's leaking oil in the spark plugs. But that's not going to get it to run better right away. But I would change that. If it's running poorly, it's not going to...

Related articles

How Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...