Q: I just replaced my maf sensor now my idle is up to 2000 rpms and bouncing up and down

asked by on

I was told my car needed a new maf sensor. We just replaced that and now my rpms are high and bouncing up and down on its own. Between 1000 and 2000. I put the old one back in to see if it would change the idle and no difference. I can't seem to figure out how to get my idle to go back to normal. Please help

My car has 200000 miles.
My car has an automatic transmission.

Hi there. Typically when this situation occurs, it’s caused by a vacuum leak. It is very common to either intentionally or accidentally remove a vacuum line while replacing a mass air flow sensor. What I would recommend is to retrace all hoses or connections, including the air intake connection as this can also cause a high idle problem. If you don’t find any lines not connected correctly and still have the problem, it might be an ECU computer glitch that should be resolved by having a professional mobile mechanic complete a engine idle is high inspection.

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. I just replaced my maf sensor now my idle is up to 2000 rpms and bouncing up and down

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: Parasitic load on battery.

Cars basically use the battery at start up. Once the vehicle is running the alternator takes over and provides the car with the electricity it needs to run. If the alternator stops producing the electricity the car needs, the car...

Q: Q: My car is accelerating on its own.

Inasmuch as you are writing in about uncommanded (aka, "unintended") acceleration, I can tell you the National Highway Traffic Safety Administration, one of the Federal agencies that tracks vehicle defects, would love to hear from you. You can file an...

Q: My car starts i put it in reverse but when i put it in to drive it has trouble moving

The transmission most likely have worn out clutch bands or discs inside the transmission. The bands hold the reverse first band to give you forward gears. I would recommend having the transmission pressure tested first to see if the problem...

Related articles

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 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...
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...