01-10-2020, 01:51 AM | #1 |
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Bootmod3 - Slight vibration/coarse feeling - Normal?
Hi,
I've been running Bootmod3 for some months now, first in Stage 1 (91 & 93) and now Stage 2 (93). On all the tunes, there is a slight vibration or coarsness to the engine. Slightly difficult to explain, but it can definitely be felt through the pedals. This happens all the time, even on low load/rpm (e.g. when crusing) and doesn't seem to affect the performance of the car. I have done logs and there is no knocking that could be causing this. Whilst on Stage 1, I thought it might be the spark plugs (as they were coming up for replacement). I had those with those replaced and the car was running without this slight vibration driving home from the dealer, but as soon as I re-tuned the car it came back. Last night I dropped back to Stock (from Stage 2) and again, the slight vibration disappeared immediately. I have seen another post on the F30 forum talking about this, but not seen anything here. Is this normal? Safe for the engine longer term? Cheers. |
01-10-2020, 03:21 AM | #2 |
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No additional vibes from my car's N55 on BM3 Stg 2 93 OTS.
What hardware have you upgraded on yours ?
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01-10-2020, 03:29 AM | #3 |
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01-10-2020, 03:38 AM | #4 |
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WT,
Have you tried resetting adaptions then seeing if the coarseness is still there ? Can you feel it thru all 3 pedals ? BP
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01-10-2020, 03:52 AM | #5 | |
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Yeah, it's probably felt mostly through the pedals, but can also be heard slightly as a change in pitch of the engine (perhaps of the tappets?? ) . I had a tuned subaru which felt very similar in the past. I guess it's probably due to more aggressive timing, but I don't understand why it would be identical for stage 1 and stage 2 if that were the case. I'll report it to bootmod3 support and see what they have to say. |
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01-10-2020, 06:55 PM | #6 | |
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11-10-2020, 11:53 AM | #7 | |
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I've been experiencing the same. Vibration/Jerking at low throttle up 2.5K RPM (All driving modes) on F33 (BM3 EWG-stage 1/91) and it disappears when reverting to stock map. Coils are good and i recently replaced the spark plugs.no misfires, Vacuum leaks, codes. MAF and MAP sensors are clean. PTF suggesting to replace the coils which seems not required. any updates from your side ? |
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11-12-2020, 08:14 AM | #8 | |
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11-12-2020, 12:10 PM | #9 | |
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-Test ignition coils resistance ? Sometimes bad ignition coils will perform bad on higher boost. -Pre and post catalytic converter readings. -Clean MAF/MAP sensors. -CP and O-ring -Boost pipe -Cold Air intake |
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