Q: idle higher than normal, misfiring, bank 1 rich

asked by on

Car is idling to high, running rich on bank one, misfiring, running rough.

My car has 146000 miles.
My car has an automatic transmission.

Hey Edward. Thanks for sending your question to us today. A high engine idle, followed by misfire is often an indication of a vacuum leak of some sort. It could also be due to failed O2 sensors or possible a damaged idle control valve. Since so many possible sources exist, an on-site inspection by a professional mechanic would be a good idea.

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. idle higher than normal, misfiring, bank 1 rich

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: Problems starting ignition switch

Thanks for writing in about your 1994 Nissan Pickup. I'm trying to picture how the oil pressure sender wires come into all of this. The wires on the starter and starter solenoid should be tight enough that you can't move...

Q: P0507 error code is showing on my 2004 Nissan Maxima

Hi there: The only time a faulty power steering pressure switch could elevate the RPM is if it's causing the pump to draw more power to operate. However, the P0507 OBD-II Error codes is more of an indicator of a...

Q: How to fix the flickering cluster light issue

Hello. It sounds like he may have damaged some of the wiring connections behind the dash. If the harness is pulled on when installing the stereo then this will occur. It is important that these wires are not moved during...

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 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...
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.