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BMW 3-Series (E90 E92) Forum
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330i odd throttle behaviour
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06-14-2007, 12:25 PM | #1 |
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330i odd throttle behaviour
Not sure if this is a problem or whether I just haven't noticed it before
In neutral, when slightly applying gas, maintaining a constant pedal position, the revs start to climb. As they approach 1500rpm, they start to fall again to about 1200-1300rpm. Gas pedal hasnt moved.. Anyone else experience this? Tried it a couple of times, so I'm not imagining it :-) |
06-14-2007, 03:51 PM | #2 |
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Drives: 2009 E90 335i MT
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I haven't noticed your phenomenon but I have noticed that my 330i has a surge at 4000 rpm in 1st and 2nd and sometimes in 3rd gear. It is a noticeable kick, too.
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06-14-2007, 04:41 PM | #4 |
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Could it be your torque converter locking up? Most auto transmissions dont lock the torque converter until mid 1st gear or 2nd gear. Which means off the line you can be accelerating with a stable RPM if you have a nice soft touch on the pedal since basically the torque converter is locking but that only lasts for a second at max.
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06-14-2007, 05:17 PM | #5 |
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06-14-2007, 05:20 PM | #6 |
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It probably has something to do with polution control and the drive-by-wire system. The computer (on some cars) delays the return to idle because it was found that there is a lot of polution getting kicked out during that time.
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06-14-2007, 05:21 PM | #7 |
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Drives: 06 E90 330i 6MT, 01 E46 330i
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So does mine and the dealer says its normal but it doesnt seem right to me.
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Mar 05 Build date,2006 E90 330i, Sport Package, Premium Package, TR MT-1's . V-1 Hard-wired power with custom V-1 Concealment Display . Rear fogs, Rear power outlet's, M short shifter knob, BlackLines, BMW Strut tower bar, CDV Delete, Front M3 wishbones + tension struts, BMW Performance shocks and springs, BMW Performance Brake kit F&R, OEM short shift kit. Rear M3 Guide rods and Wishbones.
2006 E-90 330i with 302,000 miles. |
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06-14-2007, 05:42 PM | #8 |
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+1 I was about to say the same. Our cars aren't running a fixed cable from the gas pedal to a butterfly valve in the throttle body, it's all interpreted in between by a computer.
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06-14-2007, 08:14 PM | #9 | |
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As for the idling and slowly raising revs, I'll have to try that. It does sound like a drive by wire thing.
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06-15-2007, 10:43 AM | #11 |
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Drives: 06 E90 330i 6MT, 01 E46 330i
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My 01 330 doesnt do it so that is my reference.
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Mar 05 Build date,2006 E90 330i, Sport Package, Premium Package, TR MT-1's . V-1 Hard-wired power with custom V-1 Concealment Display . Rear fogs, Rear power outlet's, M short shifter knob, BlackLines, BMW Strut tower bar, CDV Delete, Front M3 wishbones + tension struts, BMW Performance shocks and springs, BMW Performance Brake kit F&R, OEM short shift kit. Rear M3 Guide rods and Wishbones.
2006 E-90 330i with 302,000 miles. |
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06-15-2007, 10:57 AM | #12 | |
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Quote:
http://en.wikipedia.org/wiki/Valvetronic |
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06-15-2007, 11:38 AM | #13 |
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Your 01 doesn't do it because it was still drive-by-cable. That's why the E46's seem so much more responsive and faster than the e90's (in my opinion). One of my friends had a 01 330 and it just always seemed faster than my car even though we had identical horsepower. |
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06-15-2007, 11:51 AM | #14 | |
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Drives: 06 E90 330i 6MT, 01 E46 330i
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Location: Canyon Country, CA.
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Quote:
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Mar 05 Build date,2006 E90 330i, Sport Package, Premium Package, TR MT-1's . V-1 Hard-wired power with custom V-1 Concealment Display . Rear fogs, Rear power outlet's, M short shifter knob, BlackLines, BMW Strut tower bar, CDV Delete, Front M3 wishbones + tension struts, BMW Performance shocks and springs, BMW Performance Brake kit F&R, OEM short shift kit. Rear M3 Guide rods and Wishbones.
2006 E-90 330i with 302,000 miles. |
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06-15-2007, 01:25 PM | #15 | |
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06-15-2007, 02:10 PM | #16 | |
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You're correct. I just noticed that 01 was the first year of DBW. Maybe my friend's car was a 2000 328 instead..?..? |
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