Skip the auto shop - Our mechanics make house calls

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.

A: The first thing you want to check is on the...

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?

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・Save up to 30%

Get a quote

What others are asking

Q: Engine problems, sluggish acceleration, dash lights on

It would help to know what the codes were that the dealer turned off and are most likely back. If they were misfire, antilock brake, or engine problem codes they will all help in the diagnosis of the problem you...

Q: vacuum hose collapse for brake booster

No it is not supposed to collapse. The hose has most likely got soft from oil or other contaminants and should be replaced. If you find the hose has fluid in it and it is brake fluid, then your brake...

Q: Water leaking from intake manifold

This is a common issue on your vehicle. The intake manifold on your vehicle is made of plastic and mounts to an aluminum cylinder head. These materials expand and contract at different temperatures and this creates leaks. This problem is...

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...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
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...