[Ceejay18]

Not sure if I've never noticed this or if I'm going paranoid or something, but lately I've been noticing that on cold start ups when the idle starts to normalize around ~1kRPM the cabin seems to start shaking a bit (i assume this is because of the engine) for about 2-4 seconds and then goes away. The rpm don't seem to drop and the car doesn't seem to misfire, but it just feels a little rough? This issue goes away once the car is warmed up, Does anyone else have similar start ups with Dinan or stock? There is no CEL or any other warning lights.

I also took the car into the dealer and they found 2 spark plugs that were out, i got them replaced but it didn't really change anything . Car is always filled up with Chevron 91.

2015 M235i 6-Speed
~17,800 miles
Dinan Stage 2 harness W/Cf intake & MP exhaust Added at around ~11k miles

[jmwilson125]

Originally Posted by Ceejay18

Not sure if I've never noticed this or if I'm going paranoid or something, but lately I've been noticing that on cold start ups when the idle starts to normalize around ~1kRPM the cabin seems to start shaking a bit (i assume this is because of the engine) for about 2-4 seconds and then goes away. The rpm don't seem to drop and the car doesn't seem to misfire, but it just feels a little rough? This issue goes away once the car is warmed up, Does anyone else have similar start ups with Dinan or stock? There is no CEL or any other warning lights.

I also took the car into the dealer and they found 2 spark plugs that were out, i got them replaced but it didn't really change anything . Car is always filled up with Chevron 91.

2015 M235i 6-Speed
~17,800 miles
Dinan Stage 2 harness W/Cf intake & MP exhaust Added at around ~11k miles

91 on stage 2? I know Dinan is a milder tune but I thought today would require 93?

[Ceejay18]

Originally Posted by jmwilson125

91 on stage 2? I know Dinan is a milder tune but I thought today would require 93?

I don't think so, especially here in California it's really hard or nearly impossible to get 93 pump.

[Jeff@TopGearSolutions]

2 Spark plugs out? Any further information on this?

They really skimped out, they should have replaced all 6.

Granted maybe they were the most offending looking? Possibly fouled?

I'd personally replace the other 4.

If the cold start issue is consistent, get it on video.

[Shayan55]

Vanos adjusting maybe?