Q: Car hard to start and idles rough

asked by on

My car idles rough and is hard to start sometimes.

A rough idle will usually indicate that the engine isn’t running at its peak efficiency, and needs some attention. The hard start condition will also suggest that the engine isn’t running its best. The things I would look into would be fuel delivery, ignition components and engine compression. Have a certified mechanic, such as one from YourMechanic, test your fuel pressure, inspect and test ignition components, and do an engine compression test to diagnose your rough idling issue.

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. Car hard to start and idles rough

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: My truck runs rough and misfires on 1 and 7 I have put coil pack wires and plugs and fuel filter

Engine misfires can be caused by a list of problems, but there are a few suspects that occur more than others. The primary culprits are simple – spark or fuel – usually manifesting in spark plugs, plug wires, the coil(s)...

Q: 98 Ford Expedition, the Catalyst monitor and evap monitor is on before a smog test can be done. How to get 1 of these off?

The monitors may take up to 200 miles to get them to pass since it takes special conditions to get them to pass. You can have a mechanic run the monitor test before taking to inspection stations to get checked...

Q: Q: Traction Control System

The stabilitrack system is your car's traction control system. Depending on the conditions in which you were driving (i.e. snow or slippery conditions, etc), this may have caused this to engage. It may also be possible that this was engaged...

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...
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...
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...