Skip the auto shop - Our mechanics make house calls

Q: Erratic RPMs, 1995 BMW 318is

asked by on

Lately, the RPMs have been fluctuating and I'm not sure why. I had some worn hoses replaced. The throttle body has been cleaned along with the idle control valve. Still, there RPMs keep increasing and decreasing erratically. What might be the cause?

A: Hello there, there are a few possible cause...

Hello there, there are a few possible causes for your 1995 BMW 318is to have a fluctuation in the RPM’s. The most common are a vacuum leak, oxygen sensor, throttle sensor, exhaust leak, or the fuel pump. I recommend have each of these items checked in order to scope out the cause of the erratic RPMs. If you need help with this, a certified technician from YourMechanic can come to your car’s location to inspect the idle and let you know what should be done.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 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

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: security system is disabling fuel, runs rough, sputters, kills, and hard to start.

Hi there. If your vehicle has a aftermarket car alarm, you can always remove it from the vehicle. If the alarm is factory, then you will not be able to remove it, but you can repair it. It seems as...

Q: Loose gearshift

The gear shift on your vehicle is connected to the transmission via a cable. If the shifter is loose and will not shift the vehicle into the different gears, the cable might be faulty. If it is shifting fine, just...

Q: car accelerates on it's own

Hello, thank you for writing in. With some further investigation, you will see that there is a problem with Toyota and their hybrid vehicles pertaining to sudden acceleration or stopping. You will want to contact the service department again and...

Related articles

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...
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.
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.