Not joined yet? Register for free and enjoy features such as alerts, private messaging and viewing latest posts and topics.

Car Running Rough after MHD Stage 1+ Tune

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
User avatar
B21
Senior Member
Senior Member
Posts: 2978
Joined: Tue Oct 05, 2021 7:15 pm
Location: It never rains in Southern Caledonia

Car Running Rough after MHD Stage 1+ Tune

Post by B21 » Wed Jan 25, 2023 3:27 pm

Several articles

https://blog.modbargains.com/get-nuts-f ... lean-tune/

Google N54 walnut blast / cleaning…

At 110k I’d imagine it’s well coked up unless previously done…

Modded E89 20i MSport 2017-2022…Even more modded E89 35is 2021 onwards..details here.. https://www.dropbox.com/s/8h1vabklgzf4v ... t.pdf?dl=0


Image

Online
User avatar
spitfun
Member
Member
Posts: 84
Joined: Tue Oct 18, 2022 11:54 am

Car Running Rough after MHD Stage 1+ Tune

Post by spitfun » Wed Jan 25, 2023 3:48 pm

👍
2012 Z4 Sdrive35i M Sport

Online
User avatar
Marcoose
Member
Member
Posts: 583
Joined: Thu Oct 16, 2008 6:52 pm
Location: San Francisco, CA

Car Running Rough after MHD Stage 1+ Tune

Post by Marcoose » Wed Jan 25, 2023 11:00 pm

Same here, coils went bad after MHD Stage 1. But months between the two events. Hard to say if consequence or coincidence.
2016 sDrive35is, monoballs, camber plates, KW V3, PS4S, bespoke xHP map, MHD map, aux LFB pedal
Image
Mount Tamalpais, California

User avatar
R.E92
Senior Member
Senior Member
Posts: 1627
Joined: Wed Dec 04, 2013 10:10 am

Car Running Rough after MHD Stage 1+ Tune

Post by R.E92 » Wed Jan 25, 2023 11:16 pm

No need to upgrade plugs or coils unless you plan to push the car past 600bhp.

A new set of OE plugs every 20k and some Bosch coils every 60k will be fine. The 3 prong Bosch plugs are actually much better than the NGK ones, I've tried pretty much every plug option over the years and always end up back on Bosch as they are smoother and perform better for cars with stock turbos.

Without a large set of upgraded turbos you aren't going to stress the stock engine components at all. You'll run out of octane on "pump" fuel before you start to reach the fuel system limits.

Post Reply