[Evil///M]

Originally Posted by Flex68

Have you changed boost solenoids ??? Having similar issues I have checked all vacuum hoses and cp connection. Boost solenoids seem to fix a lot of boost issues. I swapped in some used later model solenoids and it def made a difference to boost. I have ordered some brand new ones and am interested to see difference . Tmw I will also change some old rubber vacuum lines that run across the valve cover which have also known to help with boost

I have thought about it but I haven't done it yet. I forget why but for some reason I decided not to replace them based on some research I did.
Also were you having underboost or overboost issues?

Originally Posted by TGNY 335

if you're going to update anything with the AP. uninstall/unmarry it first before you update it. if not you will probably lose your real stock calibration. and in the event of needing to go back to stock you won't.

make it a habit of flashing back to stock before ever doing a firmware update on the AP.

This would be such a pain in the ass for me having to change fuels haha. I have an AP2 so I'm not even sure if this is the issue. I've been running e60 BQ tune for quite a while now.

[TGNY 335]

Originally Posted by Evil///M

I have thought about it but I haven't done it yet. I forget why but for some reason I decided not to replace them based on some research I did.



This would be such a pain in the ass for me having to change fuels haha. I have an AP2 so I'm not even sure if this is the issue. I've been running e60 BQ tune for quite a while now.

that's was for and AP firmware update. which is not often ifbat all for the BMW support. a simple map change is quick. unless I misunderstand what you're saying.

[Evil///M]

Originally Posted by TGNY 335

that's was for and AP firmware update. which is not often ifbat all for the BMW support. a simple map change is quick. unless I misunderstand what you're saying.

The firmware on the AP2 hasn't changed in a while, so I'm pretty sure that's not the issue.

Are you saying I should uninstall the Cobb, then reinstall and reflash?

[Evil///M]

I'm 99% sure all my vacuum lines are good since they're all pretty new.
So as of right now I'm looking at either the solenoids or even the vacuum canisters. Either way its going to cost $ which I don't have a lot of at the moment, lol.
And I just came across these.. http://shop.stettperformance.com/pro...c?productId=40

[BQTuning]

Originally Posted by Evil///M

I have thought about it but I haven't done it yet. I forget why but for some reason I decided not to replace them based on some research I did.
Also were you having underboost or overboost issues?



This would be such a pain in the ass for me having to change fuels haha. I have an AP2 so I'm not even sure if this is the issue. I've been running e60 BQ tune for quite a while now.

What TGNY 335 suggested does not require you to change fuels. You're just using another map as a catalyst, then reinstall the actually map for your setup.

[Evil///M]

Originally Posted by BuraQ

What TGNY 335 suggested does not require you to change fuels. You're just using another map as a catalyst, then reinstall the actually map for your setup.

What spark plugs should I be using with e60 + 21psi?

[BQTuning]

Originally Posted by Evil///M

What spark plugs should I be using with e60 + 21psi?

I recommended using NGK gapped between .020" - .022"

http://www.e90post.com/forums/showpo...5&postcount=18