[krautmeister]

Please bear with me with some noobish questions.

So I got together with MavRick and I drove my car and his car back to back. He has the Dinan tune on his and our cars seem to be very close in performance.

I bought preowned so I am unsure if there is a tune on the car already. Certainly it is not a piggy back.

Now the issue is, since I took my car in for dealer service and a software update, and now it feels "slower" than before. Now, there are a slew of performance robbing ailments that may exist coincidentally but I am curious if a dealer would reflash ECU with a software update? I'm assuming the software update (I asked for the steer ahead TSB) is independent from the ECU?

Another question, if indeed I have a Dinan tune, is there a way to confirm with Dinan by way of VIN?

[badblack550xi]

Originally Posted by krautmeister

Please bear with me with some noobish questions.

So I got together with MavRick and I drove my car and his car back to back. He has the Dinan tune on his and our cars seem to be very close in performance.

I bought preowned so I am unsure if there is a tune on the car already. Certainly it is not a piggy back.

Now the issue is, since I took my car in for dealer service and a software update, and now it feels "slower" than before. Now, there are a slew of performance robbing ailments that may exist coincidentally but I am curious if a dealer would reflash ECU with a software update? I'm assuming the software update (I asked for the steer ahead TSB) is independent from the ECU?

Another question, if indeed I have a Dinan tune, is there a way to confirm with Dinan by way of VIN?

yes Dinan tune is attached to a VIN

[Stück]

When the dealer flashes ANY module, ISTA-P will program the ENTIRE car.

Whatever tune was on your DME was likely overwritten with factory software.

Contact Mission Performance if you want a real solid tune on your 550i.

[krautmeister]

So if indeed I have a Dinan or other tune, and he dealer erased it, do any of the tuners provide a "reflash" complimentary or reduced rates?

[Stück]

You'd have to explain the situation to them, but if they are a Dinan dealer they should be able to do it for you at no cost IMO.

Its not like they had a choice, even if they knew ahead of time that you had a tune on the DME. ISTA-P doesn't ask, care, or allow a work around. It just flashes any/all modules reporting an outdated version to the highest software versions.

[MattPro]

Originally Posted by Stück

When the dealer flashes ANY module, ISTA-P will program the ENTIRE car.

Whatever tune was on your DME was likely overwritten with factory software.

Contact Mission Performance if you want a real solid tune on your 550i.

He's not TU so Mission won't do it

[MavRick]

Originally Posted by krautmeister

So if indeed I have a Dinan or other tune, and he dealer erased it, do any of the tuners provide a "reflash" complimentary or reduced rates?

call Dinan and give them your VIN. if you have their flash, then you can take it to United in Gwinnett and they will re-install for you, gratis. it WOULD be interesting to try that same test on your car, now, if the flash was indeed wiped. maybe it would show accurate boost...

[krautmeister]

So bad news.... Dinan ran my VIN, never was flashed.... bummer. I guess its either a performance malady or my foot just got used to the power??? funny how perception can become reality.

On the upside, my car has the ability to bump the power!!! I was afraid if it was indeed tuned, then I got used to the power, I can only go down a really deep rabbit hole to fulfill the power greed!!!

Looks like a piggy back or tune may be in order.

[krautmeister]

So I just was poking around under the hood tonight. I've been having a "whistling" sound as of late and I chalked it up to cold weather for no rational reason. I looked at the passenger side intake pipe, and it was not totally sealed! The rubber joint was not even completely on the plastic oval tube!

Could a leak at this point give a bit less power? I'll confirm by butt Dyno in the morning.

[MattPro]

Originally Posted by krautmeister

So I just was poking around under the hood tonight. I've been having a "whistling" sound as of late and I chalked it up to cold weather for no rational reason. I looked at the passenger side intake pipe, and it was not totally sealed! The rubber joint was not even completely on the plastic oval tube!

Could a leak at this point give a bit less power? I'll confirm by butt Dyno in the morning.

Yes, definitely could. That's post-MAF so any air entering through that leak is not metered air. We have a very complex load calculation system (2 MAFs and 4 MAPs haha) so it's hard to say how much of an effect it will have but definitely not good!

[krautmeister]

I'm still on the fence on whether i have a real performance reduction.... never benchmarked the boost or anything prior to my "feeling" of lower power.

Just bought JB4 today so we shall see!!!!