Quote:
Originally Posted by widetyres
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.
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My car vibrates more when in Sport+ when at idle. I assume it has something to do with more aggressive cooling profile? Anyway maybe on BM3 you have selected their new extra cooling option or something?