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3-Series (E36) Chat relating to the BMW 3-Series from 1992-1999. Autodoodad Specific models include: BMW 316i, BMW 318i, BMW 318iS/ti, BMW 320, BMW 323, BMW 320, BMW 324, BMW 325, BMW 328.

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Old 09-29-2004, 01:32 PM   #1 (permalink)
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Hey guys,

As the heading pretty much spells out, my car is really sluggish when the temperature outside is warm, even without touching the A/C. On cooler days the performance is much much better. I know this should be the case with colder/denser air etc, but my concern is that the difference is really big. Could this be some kinda sensor or something of that nature? Any replies appreciated.
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Old 09-29-2004, 01:39 PM   #2 (permalink)
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I've had my car do that too, but only when moving really slowly, and stop once I got going faster than 45. I noticed it more on hot & humid days.


No idea what caused it though.
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Old 09-29-2004, 03:58 PM   #3 (permalink)
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What type of gas are you using?
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Old 09-29-2004, 04:10 PM   #4 (permalink)
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89 usually, 91 if the price is good.
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Old 09-29-2004, 09:12 PM   #5 (permalink)
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There's your reason. My car runs like crap if I put anything but mobil 93 in.
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Old 09-30-2004, 10:14 AM   #6 (permalink)
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Quote:
Originally posted by Kevin325i@Sep 29 2004, 08:12 PM
There's your reason. My car runs like crap if I put anything but mobil 93 in.
[snapback]201757[/snapback]
AAAAAAAAAAAAAAAAAGHHHHHH!!!!

Usually go for 89. I tried 4 tankfulls of ultramar 94 with no change. It's got to be something else.

thanks.
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Old 09-30-2004, 10:25 AM   #7 (permalink)
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Hey I know this can't be it, but this may spark a thought in someone.
It sounds like what I get in my camaro
Vapor lock, I don't know if its possible on a Fuel Injected car though.
It pretty much is the density of the air and the heat make detonation slow and Vapor builds up to the point that it won't start or what it runs like CRAP.
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Old 09-30-2004, 02:36 PM   #8 (permalink)
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an interesting thought.



I've tried running 89,91,93, and even 94. Never noticed any difference. I don't remember what I was using for gas when the car acted that way.
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