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      01-21-2020, 09:00 AM   #84
F87source
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Drives: Bmw M2
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Quote:
Originally Posted by ZM2 View Post
This brings up a couple related questions:

Do the aftermarket pumps require a tune to run at all, or just to flow more fuel?

For those of us with some warranty left, I’m wondering what an aftermarket HPFP does when you flash back to stock & lock the DME?
So far yeah they all need tunes, except the higher flow Bosch ones. Thus could be due to the Bosch hpfps utilizing the same electronics.


The car will not start or run if you have an upgraded hpfp.
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