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2Addicts | BMW 2-Series forum Technical Topics N20 (228i) / B46 (230i) Engine, Transmission, Exhaust, Tuning Issue with car after jb4 and catless downpipe, any ideas?

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      08-25-2016, 11:35 AM   #1
F22santiago
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Issue with car after jb4 and catless downpipe, any ideas?

So I went JB4 (map 2) on my 228i (n20) a year ago with no issues whatsoever, love the extra power car pulls strong. A few months ago I also went with AFE catless downpipe. Love the sound and definately feel the extr torque. However, my car now "sputters" a bit when wot on higher gears (i.e: highway pulls). No faults are thrown at all and after 5k rpms or so it clears up. I noticed it seems to happen when its colder so I am assuming it has to do with a fuel and air ratio or maybe overboost (had a similar problem on my turbo saab until i got a dyno tune). So anyone here have any idea what this could be?
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      08-25-2016, 01:21 PM   #2
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Quote:
Originally Posted by F22santiago
So I went JB4 (map 2) on my 228i (n20) a year ago with no issues whatsoever, love the extra power car pulls strong. A few months ago I also went with AFE catless downpipe. Love the sound and definately feel the extr torque. However, my car now "sputters" a bit when wot on higher gears (i.e: highway pulls). No faults are thrown at all and after 5k rpms or so it clears up. I noticed it seems to happen when its colder so I am assuming it has to do with a fuel and air ratio or maybe overboost (had a similar problem on my turbo saab until i got a dyno tune). So anyone here have any idea what this could be?
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      08-26-2016, 05:14 PM   #3
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Datalog and send it to Burger Tuning customer support
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