Q: Truck is idling poorly

asked by on

Truck idles rough now. When stoping try to surge forward surges in reverse also put in neutral runs better but not correct. Auto zone code reader said to clean maf sensor I did and was careful not to break wires, but still runs same. Took -battery side off for 30 minutes this did not help either. Do I need new maf sensor ? 2 years ago mechanic said it was coil packs changed not much better now worse.

The problem with auto parts stores’ code scanners is that they don’t accurately download most ancillary error codes, or the technician completing the scan is not trained on how to effectively complete this task. Usually idle issues are caused by the idle control valve or fuel injectors, throttle body components that are dirty and need to be cleaned. Before you spend any more money on parts or chasing a diagnosis, you should have a professional mechanic, such as one from YourMechanic, diagnose what is causing your engine to idle rough so they can recommend the correct repairs.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1,000 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
  1. Home
  2. Questions
  3. Truck is idling poorly

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: Code P0505 will not reset

Code P0505 stands for Idle Air Control (IAC) Malfunction. Anything that affects the idle control system could be the cause. This could be anything from the IAC control circuit (PCM, wiring, etc.) to a mechanical problem such as a vacuum...

Q: Regarding valve cover gaskets

The valve cover gaskets will be the same for the GS or GSI. As long as the engine is a 1.6 liter engine you will not have any problem.

Q: engine idles rough and slow after replacing the battery

You will need to re-learn the idle for the vehicle to get it to idle high enough. You should first clean the throttle plates and throttle body and idle control valve. When you disconnected the battery, the idle control was...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
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...