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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > N52 throttle response: how sharp on low rpm?



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      05-30-2014, 07:39 PM   #1
lvb125
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N52 throttle response: how sharp on low rpm?

75k miles 330i 6MT. In lower rpm range, when press down throttle, it feels like the surge of power comes somewhat half a second later. I am wondering how sharp the throttle response should be?

I ve tried the press-on-throttle-for-30-seconds trick and feel little difference.

My gas mileage also seems to be on the high side, thinking of a spark plug change?
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      05-30-2014, 08:46 PM   #2
PTA85
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Quote:
Originally Posted by lvb125
75k miles 330i 6MT. In lower rpm range, when press down throttle, it feels like the surge of power comes somewhat half a second later. I am wondering how sharp the throttle response should be?

I ve tried the press-on-throttle-for-30-seconds trick and feel little difference.

My gas mileage also seems to be on the high side, thinking of a spark plug change?
Sounds like a tune up wouldn't hurt. I changed my plugs and it helped ease the idle and smooth out the acceleration. Have the plugs been changed yet?
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      05-30-2014, 08:59 PM   #3
lvb125
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Sounds like a tune up wouldn't hurt. I changed my plugs and it helped ease the idle and smooth out the acceleration. Have the plugs been changed yet?
Not according to the service record. The car had been dealer serviced and suffered a misfire two years ago, all six coils replaced. I called the dealer said they dont usually do plugs when changing coils.

Still, is this motor supposed to have sharp instant throttle response at all times? I konw its hard to describe.
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      05-30-2014, 09:02 PM   #4
PTA85
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Originally Posted by PTA85 View Post
Sounds like a tune up wouldn't hurt. I changed my plugs and it helped ease the idle and smooth out the acceleration. Have the plugs been changed yet?
Not according to the service record. The car had been dealer serviced and suffered a misfire two years ago, all six coils replaced. I called the dealer said they dont usually do plugs when changing coils.
That's surprising that they didn't do the plugs with new coils. I would throw new ones on and see if it helps. Definitely won't hurt.
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      05-30-2014, 10:07 PM   #5
avocet
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Try to get all your adaptation values reset.
It truly made a noticeable difference for me.

And a pbx, or better yet, a tune, will transform it.
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      05-31-2014, 12:04 AM   #6
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I get the same hesitation. My car: 91.000 miles. Am sure a tune up will help (coils, plugs, check DISA, vanos solenoid, etc.)
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      05-31-2014, 11:55 AM   #7
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Unlikely, but could be clutch slippage
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      05-31-2014, 10:59 PM   #8
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I had a slight hesitation, and took my car to the dealer for an unrelated issue. The cleared something or updated something because the car ran great after that. A month later I got the AA tune and it ran better still.

Check the easy stuff tho... do a throttle pedal reset (search it), change the air filter/spray the maf with some maf cleaner. Plugs. It honestly shouldn't take much to resolve your issue. These are outstanding engines, any time I have had an issue like yours, a simple something fixed it. I have twice the miles and the car runs stronger than it did when it was new. These things age really well with good maintenance.
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