[ninja_zx11]

Today i was looking for actual vs requested boost values for my X535D in ISTA and i bumped into a setting for the adjustment of EGR flow control.I didn't try it but looks we can minimize the amount of EGR flow into the intake which can reduce carbon buildup.But i am not sure if the adjustment amount would be enough to prevent carbon build up.

[Persian Whisperjet]

You really are a ninja.

[Pat_335D]

Looks like I'll be doing this today then hopefully!

[Mik325tds]

That is a pretty cool find! 40% is definitely better than nothing.

[JOHNNYBRAVO1]

That's for non deleted EGR values?

[135i_vs_]

Great find! Try and and see if it works.

[AzRiz]

Awesome, did you find any difference in how the engine feels after doing this?

[Len_Beach]

Originally Posted by AzRiz

Awesome, did you find any difference in how the engine feels after doing this?

I've done this on my N57 Az although the settings for the N57 are 0-0.7 so 70% reduction.

I chose 0.7 naturally. The throttle response is definitely punchier and more immediate.

[kydiesel35]

[AzRiz]

Originally Posted by Len_Beach

I've done this on my N57 Az although the settings for the N57 are 0-0.7 so 70% reduction.

I chose 0.7 naturally. The throttle response is definitely punchier and more immediate.

Yeah man I knew that you did this a while back, I've been wanting to do it ever since, need to find someone near me in London to do it.

You also did the swirl flap delete and then experienced problems, is all that fixed now? Would you recommend doing this EGR change or do you think that may have contributed to the problems that you faced?

Thanks man

[Len_Beach]

Originally Posted by AzRiz

Yeah man I knew that you did this a while back, I've been wanting to do it ever since, need to find someone near me in London to do it.

You also did the swirl flap delete and then experienced problems, is all that fixed now? Would you recommend doing this EGR change or do you think that may have contributed to the problems that you faced?

Thanks man

I had the code throw up following the swirl flap removal which I've not been able to clear. There was no evidence of it in the drive of the car.

And to be honest; I had the same code prior to removal. The only difference was that resetting swirl flap adaptions cured the code. However the code is symptomatic of either carbon build up around the flaps preventing full opening or closure or a failed/faulting swirl flap actuator.

As my flaps are gone it's not actually an issue and the build up around them would have been a restriction.

I don't think the EGR adjustments would have any adverse effect. It should mean that carbon build up is diminished over time.

Put a post up for someone with ISTA nearby. Isn't Sensible from the coding forum near London?

[ninja_zx11]

Originally Posted by 135i_vs_

Great find! Try and and see if it works.

I tried and i was only able to set the low pressure EGR to +.40.Doing high pressure EGR gave me error.

[135i_vs_]

Originally Posted by ninja_zx11

I tried and i was only able to set the low pressure EGR to +.40.Doing high pressure EGR gave me error.

That sucks..but kind of makes sense from an emissions standpoint.

The low pressure EGR is only in the X5, and it is after the DPF, so relatively soot free. Therefore, adjusting it is probably allowed for slight emissions and performance.

The high pressure EGR should not be allowed to be adjusted. Violation of emissions laws.

It was too good to be true maybe

[Pete7811]

How did you get into this window? I have ISTA+ but can't find it...

[neptune6]

I also don't have this ISTA menu on my 2009 E87 N47