New member-2006 X5 4.4 i with assorted Dinan

[StanF18]

Last month I upgraded my 2006 4.4i with three Dinan mods. Got the cold air intake, new throttle body, Dinan exhausts and Stage 3 engine software.

Noticable increase in acceleration and growl. BUT when I pull out onto the highway from say a gas station, or a store on the side of the highway, I'm getting violent jerking and stopping...as if I can't get into gear. I've had this happen in both Steptronic and Sport mode, haven't yet tried the regular Drive mode.

Is this a known issue??

Funny thing, doesn't happen on straight-a-way acceleration, only on a turn-and-merge acceleration.

As far as I know Dinan doesn't have tranny software for the 2006 E53, maybe that would solve it?

[X5Jay]

:xoutpost:

Sounds like an issue with the new TB perhaps - I think others have had problems with them. I'd check that first.

[StanF18]

Hmmm....OK, but I need more specifics. Anyone else seen this problem?

[Soyox5]

Originally Posted by StanF18

I'm getting violent jerking and stopping...as if I can't get into gear. I've had this happen in both Steptronic and Sport mode, haven't yet tried the regular Drive mode.

Is this a known issue??

Funny thing, doesn't happen on straight-a-way acceleration, only on a turn-and-merge acceleration.

As far as I know Dinan doesn't have tranny software for the 2006 E53, maybe that would solve it?

I don't think it have to do with your upgrade, I have an 04 4.4i and it doing the same thing, like when I slowly stop at a stop sign and then step on the gas, I can feel the gear doesn't want to engage and then when you step the gas a little bit more it jerk, like something is holding the gear back.

[dvs]

funny thing this happend to me same situation today.
think it has to do with the transmission/gear being caught at a specific speed between shifts.

[Soyox5]

Originally Posted by dvs

funny thing this happend to me same situation today.
think it has to do with the transmission/gear being caught at a specific speed between shifts.

I think your wording is correct, especially when you try to slow down at a stop sign without a complete stop and then hit the gas.

[X5Flyboy]

Yeah, it's that "hesitation" thing - it's like the computer has to think for a moment before saying, "OK, let's go" - I've learned on my 2006 to use a gentle throttle - My 2001 with Dinan S2 just slams me back in my seat and says, "OK, you can let up when you get scared."

[StanF18]

No, it's not hesitation or LAG I'm talking about. I don't have much lag at all after my Dinan upgrade. It's much more responsive on a straight-away with the CAI and the new exhausts. The problem I was talking about is a violent, "jerky" transmission misfire when the steering is turned more than say 20 degrees. As I gun the gas during a turning merge, the car jerks to a stop, then jerks forward, then jerks to a stop again.

Dinan does not have tranny software for the 04 to 06 4.4s. So I have the stage 3 engine software, but not the tranny software. I have no idea if that's part of the problem.

[X5Flyboy]

call/email Dinan and ask them what they think - I could not imagine what it might be

[MACX5]

yes. I have the same problem with my 2005 X5 4.8is, but it only happens once in a great while. It feels and sounds like someone ran into my rear bumper. I plan on bringing it into BMW to have them take a look at it. Maybe they can solve the problem.