Test drove a 4.8 2004 today

BimmerDude · #1 05-06-2007, 02:15 AM

Ok, the following is just my opinion, and only my opinion.

I test drove a 4.8 yesterday afternoon, while I was getting my oil change. Is it me, or is the 4.8 not as fast as I thought it to be? It feels like I'm driving my X5. I have an 01 4.4i sport. I swear it accelerates like mine, when I floored it, it hesitated like no other, it didn't feel any faster then my X. I understand what the stats are on the this type of car, but guy's I'm sorry, I didn't like it one bit

. The only thing that I liked was that the steering was a lot easier to turn. That's it. Maybe I was waiting for a rocket lunch or something. I drove a 4.4i 2006, 4.8is 2004 and a 4.6is 2002. The winner by far is the 4.6is. This thing is a rocket. So much more punch then the 4.8is. Maybe the whole tranny thing gives it the slight hesitation, but come on! I would like others to try each of these cars and post there opinions as soon as possible. I was even thinking of trading mine in for a 4.8is. Forget that. I'm keeping mine and just upgrading to the 4.6 body kit. Just thought I would share my thoughts. Thanks..

bulldog002 · #2 05-06-2007, 02:29 AM

Quote:

Originally Posted by BimmerDude

Ok, the following is just my opinion, and only my opinion.

I test drove a 4.8 yesterday afternoon, while I was getting my oil change. Is it me, or is the 4.8 not as fast as I thought it to be? It feels like I'm driving my X5. I have an 01 4.4i sport. I swear it accelerates like mine, when I floored it, it hesitated like no other, it didn't feel any faster then my X. I understand what the stats are on the this type of car, but guy's I'm sorry, I didn't like it one bit

. The only thing that I liked was that the steering was a lot easier to turn. That's it. Maybe I was waiting for a rocket lunch or something. I drove a 4.4i 2006, 4.8is 2004 and a 4.6is 2002. The winner by far is the 4.6is. This thing is a rocket. So much more punch then the 4.8is. Maybe the whole tranny thing gives it the slight hesitation, but come on! I would like others to try each of these cars and post there opinions as soon as possible. I was even thinking of trading mine in for a 4.8is. Forget that. I'm keeping mine and just upgrading to the 4.6 body kit. Just thought I would share my thoughts. Thanks..

Mine did the same thing, until I went back to the dealer last Friday and they updated the computer. Man, now it drives like it should have when I bought it, no hesitation it's all go now and none of that harsh 2-1 downshifting. I am very happy with my X5 now and it is a lot of fun to drive, I am glad I went to the dealer and got this fixed because it sucked without the fix.

xx3 · #3 05-06-2007, 02:34 AM

Simple fix. The last owner must have not driven it very spiritedly...

Simply turn the key to position 2. Hold the accelerator to the click point for 25 seconds. Let go of the accelerator, start the engine and off you go...

The transmission's learning algorithm will be reset to 0. Therefore, it will lose the slow and gentle acceleration that the previous owner used...

Try it, and repost your results

I guarantee your experience will be very different...

JV · #4 05-06-2007, 10:16 AM

Quote:

Originally Posted by xx3

Simple fix. The last owner must have not driven it very spiritedly...

Simply turn the key to position 2. Hold the accelerator to the click point for 25 seconds. Let go of the accelerator, start the engine and off you go...

The transmission's learning algorithm will be reset to 0. Therefore, it will lose the slow and gentle acceleration that the previous owner used...

Try it, and repost your results

I guarantee your experience will be very different...

That sounds more like a throttle response fix to me

but good info nonetheless!

Don't forget that shifter has the sport mode option. If I want to drive fast, I put my X in sport mode and then it gets much quicker.

AzNMpower32 · #5 05-06-2007, 11:05 AM

SG felt the same way at the DC meet. He blames the Valvetronic.

wheelman · #6 05-06-2007, 04:29 PM

Quote:

Originally Posted by xx3

Simple fix. The last owner must have not driven it very spiritedly...

Simply turn the key to position 2. Hold the accelerator to the click point for 25 seconds. Let go of the accelerator, start the engine and off you go...

The transmission's learning algorithm will be reset to 0. Therefore, it will lose the slow and gentle acceleration that the previous owner used...

Try it, and repost your results

I guarantee your experience will be very different...

Will this work on all years?

Essam Khafagi · #7 05-06-2007, 04:32 PM

Quote:

Originally Posted by xx3

Simply turn the key to position 2. Hold the accelerator to the click point for 25 seconds. Let go of the accelerator, start the engine and off you go...

I tried this and the difference is AMAZING! .. Thank you very much!!

xx3 · #8 05-06-2007, 05:44 PM

Quote:

Originally Posted by Essam Khafagi

I tried this and the difference is AMAZING! .. Thank you very much!!

Its only a matter of time though before the transmission relearns its old ways

...

Blademan007 · #9 05-30-2007, 10:06 PM

Quote:

Originally Posted by xx3

Simple fix. The last owner must have not driven it very spiritedly...

Simply turn the key to position 2. Hold the accelerator to the click point for 25 seconds. Let go of the accelerator, start the engine and off you go...

The transmission's learning algorithm will be reset to 0. Therefore, it will lose the slow and gentle acceleration that the previous owner used...

Try it, and repost your results

I guarantee your experience will be very different...

Hold at click point, or hold past the click point?

LVR · #10 05-31-2007, 12:43 AM

There are a few reasons why this happens......

Seat of the pants difference between two vehicles usually comes back to Torque comparisons, as that is what you feel off the line... not power. Power is a function of revolutions vs time.

You don't know what state the software is in, nor the programming. The two are different as BMW have just reprogrammed mine to try and eliminate the detonation I have been experincing. All they have done, (proven now on the dyno) is merely retarded the timing and taken approx 30ft lbs of torque out of the engine. When you consider that the 4.4 is only 26ft lbs behind the 4.8is, it means you definately feel it.

The state the software is in is as the other comments already made. If you do not drive your car hard, the software learns and sets the advance/gear/fuel etc to suit. A gentleman on the E60 boards has measured (over time/numerous runs) and found that driving style can mean up to half a second is eventually lost in the performance stakes if you are a conservative driver.

I disagree about valvetronic as when I bought the 4.8is I back to backed it with a 4.4 and the difference was significant.... problems is that it's just not sustainable.......

That alone wasn't the reason I went for it... the handling and extra options just seemed to me the ultimate package. I remember saying to my wife at the time that this is IT, the car to keep for good as it had everything I wanted....

Cheers