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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 > Poor throttle response from a stop- normal??



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      03-24-2013, 07:59 AM   #1
sirdaft1
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Poor throttle response from a stop- normal??

I've noticed that my 328xi has a noticeably delayed response when I press the gas to get it moving from a dead stop. Its an automatic. Anyone else experience the same thing? Is this just normal for BMW's or could it be something I should look into?
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      03-24-2013, 09:44 AM   #2
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Quote:
Originally Posted by sirdaft1 View Post
I've noticed that my 328xi has a noticeably delayed response when I press the gas to get it moving from a dead stop. Its an automatic. Anyone else experience the same thing? Is this just normal for BMW's or could it be something I should look into?
Normal

Especially in regular Drive - it's slightly improved when in DS

If you want ot get rid of it go with a BMS Powerbox (throttle & slight tune remap), Sprintbooster (throttle remap only), or full software tune

The BMS & Sprintbooster are 'piggy back' devices that install inline with main computer that fool the computer as far as throttle opening so you get a much crisper response - and they work just fine to remove the lag. I use the BMS

For a full software tune, the entire software in your computer will be overwritten and changed up

Full tune is most $$ @ around $400-$500, while the others are around $275 new, cheaper if bought used on forum...
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      03-24-2013, 10:47 AM   #3
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2008 BMW 135i  [0.00]
+1 that basically says it all lol.

Our cars use an electronic throttle compared to a conventional throttle cable. The lag is a result of this technology.
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      03-24-2013, 10:58 AM   #4
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While true Spinz... it is more than this, for some reason this feature is designed in by BMW, who knows why?
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      03-24-2013, 11:03 AM   #5
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Yes, it is a result of drive by wire with no mechanical connection - but BMW could easily get rid of it by changing the software algorithms that control the throttle.

I have driven other DBW cars that did not have this noticeable lag

Still nothing like good ole' fashioned mechanical throttle linkage though
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      03-24-2013, 11:27 AM   #6
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Lol true, thanks for elaborating. And no kidding, drove my parents to the airport today in their 08 escape... I had forgotten what a real throttle felt like, basically floored it unintentionally off every red haha

Slightly off topic, has anyone taken the new F30's for a spin - is this still an issue or has BMW fixed it?
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      03-24-2013, 11:37 AM   #7
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I just drove a rental car this week (a newer Mitsu Galant) and I couldn't believe how much more the responsive it was from a stop- to the point that I was spinning the tires because I was driving it like I'm used to in my 328.
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      03-24-2013, 03:41 PM   #8
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Yea my previous car was an acura tl, also a dbw throttle, but the thought of a delayed throttle never occurred to me in over 160K miles in that car. This aspect of the BMW's is a real head scratcher to me.
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      03-24-2013, 04:36 PM   #9
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Quote:
Originally Posted by Spinz View Post
Slightly off topic, has anyone taken the new F30's for a spin - is this still an issue or has BMW fixed it?
I test drove an F30 335i sport last week, it gave me like 4 driving conditions eco pro, eco, D, and sport. Each one was different with the lag, on sport mode I couldn't tell if there was any lag since I only tested it for a few miles. But selecting was like tunes on the go.
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