Q: Why is it still misfiring?

asked by on March 04, 2017

Replaced the injectors, ignition module, spark plugs. Yet the car still misfires and reads code p0300 and the cel flashes when i put it in gear. Idles fine but seems to vibrate and kinda put also like to burn rich. Like strong smell of gas. Did give off codes p0137,p0138,p0400,p0440,p0441,p1138 also. I cleared them on a ocd reader. Reread codes only throwing off p0300 code now. Clueless, will drive but limited power and cel flashes.

My car has 147913 miles.
My car has an automatic transmission.

Hi there. Check the Exhaust Gas Recirculation valve on the engine. It seems to be sticking on when the engine is running at low idle and causing a misfire as the old exhaust that is burnt is reentering the engine. You may need to clean the EGR valve or replace it if the valve will not free up.

If you need further assistance with your engine having random misfires with the codes on for the EGR not working, then seek out a professional, such as one from Your Mechanic, to help you.

Was this answer helpful?
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

Hi am getting a misfiring in my turbo car but not at all the time

It sounds like you may have excessive water in the fuel of the fuel tank. You should try to put in some dry gas to disperse the water in the tank and try a different fuel station to see if...

electrical issue - Interior lights flicker when headlights are turned on.

Any time when lights are flickering, there is a loose ground wire or a short. If the headlights are turned on and the interior lights are flickering, then either the ground wire in the steering column is loose or there...

My car had no water or oil and it started overheating. What's wrong?

As you may know, your car requires oil and coolant for two different reasons as they serve two distinct purposes. The oil lubricates internal engine parts and plays a part in reducing heat due to friction with metal on metal...

Related articles

P2761 OBD-II Trouble Code: Torque Converter Clutch Pressure Control Solenoid Control Circuit/Open
P2761 P2761 trouble code definition The P2761 code relates to the control solenoid valve assembly’s function within the torque converter clutch (TCC), which eliminates efficiency loss of fluid coupling by locking the two parts of the torque converter together when...
P0501 OBD-II Trouble Code: Vehicle Speed Sensor Range/Performance
P0501 code definition Vehicle Speed Sensor Range/Performance What the P0501 code means P0501 is an OBD-II generic code that the engine control...
P0019 OBD-II Trouble Codes: Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B)
P0019 P0019 code definition Crankshaft Position - Camshaft Position Correlation (Bank 2 Sensor B) What the P0019 code means P0019 is the OBD-II generic code indicating that the crankshaft and Variable Valve Timing (VVT) position sensor B for bank 2...