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RPM is too high on idle .. warm engine RPM is too high on idle .. warm engine
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Old 3rd January 2009, 23:25   #1
ehssan_alkhiyami
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RPM is too high on idle .. warm engine
Hello there ..

I've noticed a lot of people faced unstable RPM while idle ( engine on - car parked ) .. my car most of the time is aroung 900 RPM ...

the dealer said : fuel tank - fuel pump - carbon filter need to be replaced ..

did anyone had this issue before .. you know what . most of M5 and M6 V10 pictures I see on the net ( ebay - m5boad.com - gtboard.com ) the RPM is always higher that normal ...

my car is acting very strange : sometime time RPM is high then after 2 minutes it calms down to 550 RPM i guess .. then again after another 2 minutes it goes up to 900 RPM again ..

thanks in advance for sharing the info's .. happy new year guys ..
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Old 4th January 2009, 00:31   #2
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Quote:
Originally Posted by ehssan_alkhiyami View Post
Hello there ..

I've noticed a lot of people faced unstable RPM while idle ( engine on - car parked ) .. my car most of the time is aroung 900 RPM ...

the dealer said : fuel tank - fuel pump - carbon filter need to be replaced ..

did anyone had this issue before .. you know what . most of M5 and M6 V10 pictures I see on the net ( ebay - m5boad.com - gtboard.com ) the RPM is always higher that normal ...

my car is acting very strange : sometime time RPM is high then after 2 minutes it calms down to 550 RPM i guess .. then again after another 2 minutes it goes up to 900 RPM again ..

thanks in advance for sharing the info's .. happy new year guys ..
It sounds like you got some bad gas.
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Old 4th January 2009, 01:40   #3
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Agree, maybe fuel, maybe air flow sensor...what tier fuel are you using ??? What is it's octane rating and does it contain any additives, like Ethanol ?
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Old 4th January 2009, 07:34   #4
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the fuel that we have here is 98 and 95 octane , i don't know any other info about gaz . I've seen another thread talking about the same issue before but i'm not able to find it ....
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Old 4th January 2009, 10:59   #5
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Think mine idles around 700, but to be honest it hunts all the time when stationary for than a minute between 500 and 1000 so hard to know what the idle speed is! Never really thought about this.....
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Old 4th January 2009, 11:05   #6
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same problem here. with the tubi mufflers and xpipes as well you can notice the engine sound clearly raising as the rev raises as well. I think its bad gas
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Old 4th January 2009, 11:16   #7
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so no one have raised this issue to the dealer ..?
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Old 4th January 2009, 21:22   #8
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can you check to see if the revs go high when the cooling fan comes on?
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Old 4th January 2009, 21:32   #9
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Quote:
Originally Posted by ehssan_alkhiyami View Post
the dealer said : fuel tank - fuel pump - carbon filter need to be replaced ..
my car is acting very strange : sometime time RPM is high then after 2 minutes it calms down to 550 RPM i guess .. then again after another 2 minutes it goes up to 900 RPM again ..
From what you said it sounds like you just got bad gas.
From what the dealer said it confirms you had bad gas.

Here are the top tier gas companies: Top Tier Gasoline

To know for sure you need to test the gas. Have BMW fix your car and watch out for what gas stations you go to.. also be aware of what additives are in the gas (should say on the pump).
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Old 4th January 2009, 21:49   #10
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good news and info ,, I'll wait for the dealer report ,, let's see ..
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