Q: Loss of power and misfiring in 2000 BMW 323CI

asked by on

I have a 2000 BMW 323CI. I'm having problems. When it first starts it is fine, but when it warms up to a normal temperature, I have a loss of power and it misfires. Sometimes when I first start, it's only fine for a couple of minutes.

The first thing you want to check is on the driver’s side, the intake manifold and all the plastic there is between the radiator and the engine. You may barely even see them without a flashlight and a little mirror. Check for vacuum leaks and all that plastic cracks, because if it has cracks, it leaks air and does exactly what yours is doing.

The other thing you should do is have a good mechanic put up a scan tool and check the MAF sensor, because a lot of times it’s the MAF sensor. The MAF will go bad on those and do exactly that. If it is that, take my advice and buy a factory sensor, don’t buy those cheaper ones made in China, because they just don’t work on a BMW. Have this inspected by a certified technician, such as one from YourMechanic if you need help. They will be able to diagnose your car’s loss of power and misfiring issues so you know exactly what should be repaired.

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. Loss of power and misfiring in 2000 BMW 323CI

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: The eml light turned on and then the car decelerated. Just wanted to know what it means and if I require a mechanic

EML refers to the electronic throttle control system. It's a system integrated into the engine and body controllers to select the proper the throttle position for whatever the driver is demanding. There are several sensors and actuators in play and...

Q: Advice on how to find the exhaust manifold leak

The first thing to do is check it when the engine is cold. When it is cold the metal shrinks and if it is leaking, it will leak more. Also, since it's cold you can feel around with your hands....

Q: What are the three hoses coming from air box on my Buick verano?

Hello, thank you for writing in. There are several vacuum lines associated with the engine intake and throttle. One of which that does run along up towards the firewall is the brake booster line. This vacuum helps assist the master...

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 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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...