Q: Rough idle on car

asked by on

My car is idling roughly.

Hello. The most common cause of a rough idle on this engine is a vacuum leak. Most of the time this is caused by a loose or broken vacuum hose. With the engine running you can listen for any hissing noises from the hoses to see if one is leaking. If nothing is found then it may be due to worn spark plugs. Most of the time if the problem is not obvious a mechanic will scan the computer for codes to see if there is anything saved in the computer. If there are then that may identify where to start. If not then the computer data from the sensors would be looked at to see if it is a sensor problem as a failing is a dirty sensor can also cause this. I would typically also check to see if the throttle body is dirty. If it is then it should be cleaned first to see if it solves the problem. Have a certified mechanic diagnose your car’s rough idle to have this problem solved accordingly.

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. Rough idle on car

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: Q: Car shakes when in idle.

Hi there. With this many issues you really need to enlist the assistance of a certified mechanic, like one from YourMechanic, that has the knowledge and tools to do this. If you have a bad control arm it will typically...

Q: need the water pump replaced would this also involve the timing belt

It would be recommended to replace the serpentine belts, water pump, and timing belt tensioner pulley with the timing belt. You might even consider replacing the valve cover gasket. If would like to have these repairs done, a certified technician...

Q: Transmission swap 1997 Ford F150

Hi - the short answer to your transmission swap question is "maybe". There are 4 possible automatic transmissions between 1997 and 2000 for the F150 (E4OD, 4R100, 4R70W, 4R75E/W). There will be a metal tag on each transmission indicating which...

Related articles

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...
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.