02-02-2021, 04:09 PM | #1 |
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Somtimes Big power lag
i need help to fix the problem with my b48! once in a while at acceleration after a red light there is almost no power. I step the pedal down a bit and nothing happens and step down slowly almost completely and only then does it start to roll dullly and after 4-6 seconds then the power comes. it happens at large intervals and can run without happening for hours. the engine is almost brand new. it's hard to figure out and wonder a lot as it happens at large intervals. someone who can diagnose the problem ?
Setup: Bm3 stage2 FTP charge pipe Mtc Catless downpipe Complete bastuck exhaust Rest Stock |
02-03-2021, 12:06 AM | #2 |
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I've noticed this exact same thing. B48 engine. I've noticed that it only happens after starting the car for the day and until the engine warms up. I'm tuned with a dp as well but this happened before any of that. Not sure what that huge power lag could be.
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02-03-2021, 04:30 AM | #3 | |
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02-03-2021, 04:41 PM | #6 |
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02-04-2021, 04:01 PM | #9 |
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02-05-2021, 10:41 AM | #10 | |
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02-05-2021, 11:59 AM | #11 | |
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02-22-2021, 09:35 AM | #13 |
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02-22-2021, 09:36 AM | #14 | ||
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08-20-2022, 02:43 AM | #16 |
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Hello, sorry to bring this post back up after over a year, but I've also been facing similar issues with my G20 330i (B48).
Have you managed to find the problem and solve it? I am also looking for help and some people seem to be thinking that my turbo could be on its way out, which is very scary to hear, especially since my car is still pretty new. |
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08-30-2022, 06:28 PM | #17 | |
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09-01-2022, 01:20 PM | #18 |
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I've been checking codes and even brought the car to an indy shop, they said that there's no codes that would suggest turbo failure or anything related to the issue
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09-01-2022, 01:28 PM | #19 |
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Hello, I'm not sure if you're still active on here but on the off chance that you see this, may I ask if you ever got the turbo issue sorted out? Did you experience any CELs or other codes that may be worrisome? Did you turbo ever end up failing?
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09-14-2022, 11:05 AM | #20 | |
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If it is a B48 20I 25I most likely the integrated variable exhaust manifold is faulty, I have encountered cases |
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09-14-2022, 07:34 PM | #21 |
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09-15-2022, 09:27 AM | #22 | |
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Replace with a new one, then repair the old one can save times Or changing the cylinder head of the 30I would work, but I didn't try it. 30I does not integrate exhaust manifold |
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