Drivability, is it just me ?
#1
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Is it just me, or is there a flat spot in throttle/trans response on leaving a standstill? It is as if the engine revs more than the car moves, a disconnect feel, then a mushy shift to 2nd (or I've been told, it starts in 2nd- so on the shift to 3rd). I did the adaptive reset where you hold the gas pedal down and it resets the adaptive trans, or at least it says it does, and I felt there was a significant improvement. Although short lived.
I am still under CPO wty, the car is new to me, so I went to the dealer and they essentially said "They all do that, they are designed for soft comfortable shifts". I was expecting them to say that the mechatronics (sp)unit is bad.
I love a smooth powerful feel when you barely feel the shifts but know that if you push the pedal it will jump. That's why I loved my 2002 540, but I'm not getting along with the '06 550 nearly as well.
I just ordered the Sprint Booster. Maybe what I'm feeling is the DBW delay. I hope so. The disconnect feeling is making me dislike what should be the car of my dreams.
Your thoughts are welcome and appreciated,
john
I am still under CPO wty, the car is new to me, so I went to the dealer and they essentially said "They all do that, they are designed for soft comfortable shifts". I was expecting them to say that the mechatronics (sp)unit is bad.
I love a smooth powerful feel when you barely feel the shifts but know that if you push the pedal it will jump. That's why I loved my 2002 540, but I'm not getting along with the '06 550 nearly as well.
I just ordered the Sprint Booster. Maybe what I'm feeling is the DBW delay. I hope so. The disconnect feeling is making me dislike what should be the car of my dreams.
Your thoughts are welcome and appreciated,
john
#2
DS mode will help but mine tends to jerk a bit in sport mode. Also that transmission resetting trick does seem to work at first, or may be I'm imagining thing, but eventually the problem will go back.
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My Ride: 2008 550I LOADED, all options except HUD and NV
You basically have 2 choices:
1) Sprint booster to boost the signal sent from the throttle to the ECU (not worht it in my opinion since it offers no HP gains at all)
2) ECU tune, of which all give little HP gains, but the gains in throttle response and fuel economy are much better. Add to that the fact that most tunes are only slightly more expensive than the Sprint booster V2 - it's a no brainer
Our drive by wire systems are typically slow to respond, on purpose.
1) Sprint booster to boost the signal sent from the throttle to the ECU (not worht it in my opinion since it offers no HP gains at all)
2) ECU tune, of which all give little HP gains, but the gains in throttle response and fuel economy are much better. Add to that the fact that most tunes are only slightly more expensive than the Sprint booster V2 - it's a no brainer
Our drive by wire systems are typically slow to respond, on purpose.
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You basically have 2 choices:
1) Sprint booster to boost the signal sent from the throttle to the ECU (not worht it in my opinion since it offers no HP gains at all)
2) ECU tune, of which all give little HP gains, but the gains in throttle response and fuel economy are much better. Add to that the fact that most tunes are only slightly more expensive than the Sprint booster V2 - it's a no brainer
Our drive by wire systems are typically slow to respond, on purpose.
1) Sprint booster to boost the signal sent from the throttle to the ECU (not worht it in my opinion since it offers no HP gains at all)
2) ECU tune, of which all give little HP gains, but the gains in throttle response and fuel economy are much better. Add to that the fact that most tunes are only slightly more expensive than the Sprint booster V2 - it's a no brainer
Our drive by wire systems are typically slow to respond, on purpose.
Thanks for the response. I follow your logic but wasn't able to find an ECU programmer for the 550. Does anyone know of one for the 550?
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My Ride: | 2006 550i | Silver Gray Metallic | Sport Package | 6-speed MT | Logic7 | NAV | CWP | Tan Dakota Leather | Stock 124s | 35% tint |
thank goodness for my manual. 360 lb-ft . . . no waiting.
mysery loves company though - my GL450 is awful with this, and it weighs a hell of a lot more than my 550.
mysery loves company though - my GL450 is awful with this, and it weighs a hell of a lot more than my 550.
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My Ride: 2008 550i M-sport, retrofitted heated M-sport steering wheel with paddles, Sport-auto transmission
There was also a software update for the transmission that dealt with "hesitation" when accelerating from slow speeds or a stop. I had this issue when I first took posession of my '08 550, and it was fixed with a quick reprogram at the dealer - fortunately I was under warranty so it was at no cost (to me).
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There was also a software update for the transmission that dealt with "hesitation" when accelerating from slow speeds or a stop. I had this issue when I first took posession of my '08 550, and it was fixed with a quick reprogram at the dealer - fortunately I was under warranty so it was at no cost (to me).
Hopeful that the DBW fix will get me somewhere
#8
As far as ECU tunes you can contact Dinan and Singh from my knowledge. I am going to try a local tuner to me that uses G-Power tunes from Europe. There are a few more but I forget from memory.
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My Ride: 2008 550i M-sport, retrofitted heated M-sport steering wheel with paddles, Sport-auto transmission
I have no problem "lighting up the tires" (well tire, actually - darn lack of LSD!) even in "D" mode with my 550i so hopefully you can find a solution.