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  #1  
Old 05-21-2019, 06:24 AM
Rex113 Rex113 is offline
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2002 X5 4.6 stalls when starting.

Hi, I really hope someone can help with my problem. My car starts up perfect when the engine is cold the idle stays at around 1000 rpm for a minute then goes down to about 550 rpm. It idles smoothly and runs great with no hesitation or performance problems. My problem begins when I restart the engine once it reaches normal operating temperature.It starts right up but after a second the rpm’s drop way down and it will stall. If the air conditioning is on when I try and restart it will help a little bit, but will still stall the majority of times. The only way I can get it to stay running is to manually press on the accelerator pedal to keep the idle up once I do that it will idle smoothly. I checked for vacuum leaks and have not found any. Thanks in advance.
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  #2  
Old 05-21-2019, 11:36 AM
Rickster X5 Rickster X5 is offline
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Hey Rex,

I had similar issue... ended up being my DISA (flap was broken). Easy to replace. Flap works like carb butterfly, opens and closes to allow air in... Mine was broken and always closed so choked up engine. It only takes 10 minutes to pull it and look. There's Youtubes on it.

Good luck.

Rick
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Old 05-21-2019, 03:02 PM
Rex113 Rex113 is offline
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Originally Posted by Rickster X5 View Post
Hey Rex,

I had similar issue... ended up being my DISA (flap was broken). Easy to replace. Flap works like carb butterfly, opens and closes to allow air in... Mine was broken and always closed so choked up engine. It only takes 10 minutes to pull it and look. There's Youtubes on it.

Good luck.

Rick
Thank Rick I will try it soon and report back.
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  #4  
Old 05-21-2019, 05:11 PM
Rex113 Rex113 is offline
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I was looking for the DISA valve on my engine. It seems to only have a throttle body with a round metal plate, not the typical black plastic flap that I usually see in pictures on this forum. The metal plate seems secure. Is there a way I can check to see if it's operating normal?
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Old 05-22-2019, 04:05 AM
Rickster X5 Rickster X5 is offline
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Sorry Rex,

Just noticed you have the 8... I believe the DISA is only on the 6 (M54 motor)...

I read some other guys with the 8 had a faulty fuel pump that was producing similar symptoms.

Thanks,

Rick
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Old 05-26-2019, 07:23 AM
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BimmurBrothor BimmurBrothor is offline
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Mein Auto: X3 M54 150k
Just visiting here from x3 E83 Land...
Didn't read any of the past posts.
Did anyone recommend cleaning the idel control valve...?

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