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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 01-17-2013, 06:42 PM
Gootz4u Gootz4u is offline
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Location: San Marcos Tx
 
Join Date: Dec 2010
Posts: 93
Mein Auto: 2001 540i BMW
My car misfires

When I turn on my car, it idles rough and I try to give it a little gas but when I step on the gas pedal the motor does not respond. When the car is finally warmed up the idel goes up to normal which is right under 1 RPM. A frined of my told me to idel the car at 4000 RPM to check the cats but I could not get it up to 3000 RPM. The idel kept going up and down up and down while I was pressing on the gas, then the car misfired a couple of times. I did notice when I was driving, I could not get it to move more than 20 mph and my check engin light was flashing. I have looked for vacuum leaks and I have found nothing. Could it be the AMF or the throttle body. Anybody got any ideas? Thank You for your help.
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  #2  
Old 01-17-2013, 06:59 PM
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johnstern johnstern is offline
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Location: Cape Neddick, Maine
 
Join Date: Mar 2007
Posts: 942
Mein Auto: 2000 BMW 528iT/5, S/C
Sounds like a vacuum leak. Vac leaks are hard to find without smoke test. You can take apart the intake boots and look for a tear. If you find nothing, take the car to an indie who is a BMW expert and get a smoke test.
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Old 01-18-2013, 05:06 AM
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bluebee bluebee is offline
Seek to understand,^Value
Location: San Jose, California
 
Join Date: Mar 2008
Posts: 21,112
Mein Auto: 02 BMW 525i M54 auto 130K
Quote:
Originally Posted by Gootz4u View Post
I could not get it to move more than 20 mph and my check engin light was flashing.
The flashing amber check engine light indicates that expensive damage will be done to the vehicle emissions devices.

I myself have never encountered a flashing check-engine light - but I would take it seriously if I were in your shoes.

At the very least, I'd invest $25 in a scanner.
- Cheapest CAN OBDII scanner on the net that reads DTCs, pending codes, & clears codes



In addition, the OP needs to read this thread:
- How to diagnose a BMW E39 engine misfire (1) & a cold-engine intermittent misfire (1)
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Each repair should invariably add to our knowledge base by the process of inexorable incrementalism.
Your job, in return, is to read the suggested threads, where the best people will always add value to those threads, either by pictures or by descriptions, so the next person with the same problem stands on your shoulders.
See also: E39 Bestlinks & How to easily find what you need
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