Hi all... I have an M50B25Tu with M52B28 crank and rods in my car... It's pretty faster than OEM m50b25tu normaly... But I have one problem with it... When I'm driving 1/4 mile I can see that it has a small cut when I'm changing from 3rd to 4th gear at high revs, sometimes 2nd to 3rd but it's there every 3-4 change and it lasts for less than a second but for this time engine power is equal zero... I tried to change fuel pump, spark plugs are old maybe 10k, coilpack is good, Vehicle speed is connected, earth is good, Vanos seals are new from Beisan... Now what??? I have problem with my tachometer, car speed is not working all the time... Could this be a problem??? I was driving it before without Vehicle speed signal and rev limiter was different, now it sounds ok, but cut is there and I don't know what to do anymore... :???: