Q: My car has a rough idle and misfires once its warmed up

asked by on

Took screen out of mad sensor and problems started from there misses and cuts out once warmed up can be driving at 60mph and it surges and cuts out while driving then sitting at stop lights it's rough and exhaust is horrible and white smoke out of one pipe and the other blows black stuff out also changed plugs and wires checked then a week later and one side was fine the other was black

My car has 241000 miles.
My car has an automatic transmission.

Hi, and thanks for contacting YourMechanic. First of all, the mass air flow (MAF) sensor requires its screen; the air registering through the sensor is monitored with the elements in the screen. By removing the screen, you actually destroyed the sensor. I recommend replacing the MAF sensor before testing anything else on the vehicle. If you need assistance troubleshooting this issue, or the problems continue, then seek out a certified technician, such as one from YourMechanic, to assist you with your rough idle and engine misfires.

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
  1. Home
  2. Questions
  3. My car has a rough idle and misfires once its warmed up

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: No spark to coil and module

There are a number of issues that may cause an ignition system to not produce spark. A bad crankshaft position (CKP) sensor (on engines that do not have a distributor), or broken, loose or corroded wires from the sensor...

Q: My 2004 Jaguar VDP Engine is misfiring/vibrating and its performance/acceleration is restricted!

Hello. The misfires, along with the symptoms you are experiencing can be caused by a wide variety of different things. The restricted performance light and settings are activated when the computer detects that there is an issue that could potentially...

Q: Turn ignition on fuel pressure goes to 60 lbs two seconds and fuel pump relay clicks pressure drops 5 lbs then slowly drops to 0to

It sounds like this fault may have more going on than just the fuel delivery issue. The vehicles ECU will command the fuel pump to turn on normally when a vehicle is started. If the car only primes for the...

Related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.