Skip the auto shop - Our mechanics make house calls

Q: Hesitating and missing in drive or park, fine over 45 mph

asked by on

My car has some issues at low RPMs. There are no problems if I develop the speed over 45mph. However, it seems to be hesitating and missing while it is in drive or park. There is rough idling as well. I took the car to several shops and they couldn't fix this. I had wiring and spark plugs replaced. That didn't help. What could be causing this? Thanks.

Hello. Quite a few different items can cause an erratic idle as well as an engine that misses. The spark plugs and wires are a great place to start. Other possible causes of this fault include: low fuel pressure, vacuum leaks, exhaust leaks, an oxygen sensor failure, and a failing fuel pump. Now that the spark plugs and wires have been replaced, the next step is to perform a diagnosis on this fault. A certified mechanic like one from YourMechanic will be able to thoroughly inspect your misfiring issue and make the repairs that are needed.

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: Serpentine belt came off of 2004 Lexus IS 300

Hi. The timing has a service life of 90,000 miles. Depending on the vehicle's mileage and the last time the timing belt was changed, it will determine when you need to have it replaced. The water pump itself has no...

Q: Battery light comes on when I crank the car but then goes out. Is this normal?

The battery light and the other warning lights should come on when you turn the key to the on position before you start the car. This is a bulb check function and is normal. Some lights may remain on while...

Q: Carbon fouled #3 and computer shows misfire on #3

If the car is running fine then it will more than likely have an exhaust leak. If the engine is starting to run a little rough again then it may have a valve issue in that cylinder. I would usually...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.