Q: rpm below 1 when idle

asked by on

I noticed that when i am stopped at a red light my car's rpm is in the middle of .5 and 1. I have had my spark plugs changed, and oxygen sensor changed as well. (After getting those items fixed my check engine light went off.) If i am not pressing on the gas pedal hard my car will jerk at 18-20 mph. Is this normal?

My car has 197000 miles.
My car has an automatic transmission.

Hi there:

What you’re describing is not a normal situation. Although changing the spark plugs and O2 sensor tend to fix this type of issue, it could also be caused by dirty fuel filter, clogged fuel injector lines, or another electrical gremlin. It also may be the idle control system that is faulty. The best thing to do is have a local ASE certified technician, such as one from YourMechanic, complete a computer diagnostic test which will display an error code and point them in the right direction to fix the problem you’re experiencing.

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. rpm below 1 when idle

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: Car Not Starting - 2013 Dodge Charger

Hey there. I would start with testing your battery and alternator with a multi-meter. Good batteries hold a charge of 12.6 volts or higher. If the battery is low, try to jump start it. If this starts your vehicle, test...

Q: R

When the car is absolutely stone cold, check the coolant level in the radiator and in the reserve tank, too. If the coolant level is low, add the appropriate anti-freeze for your model. If the level is low, there might...

Q: Have 93 accord 5 speed. Won't crank and gear shift moves into gears without pressing clutch. All lights and battery is good. Thx

When the engine is not running, it is perfectly normal to be able to select gears without pushing the clutch. If the clutch pedal feels the same as it always has, then there is probably no issue there. Your car...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
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...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...