Hi All :-)

Last week while i,m driving about 120Km/H , RPM was around 2000
After that I did hard accelarate , when RPM reach 4500 , the shifting was cut , rpm reach 8000 without car moving.

I stop the car and start it again , I did hard accelartion but nothing happen every thins was normal ,

two days back i go to BMW agence to check my transmation , they said nothing on my transmaetion but I have an issue with my high pressure bumb ,

My question , Did high pressure bumb will efect to my shifitng so it will be cut ???!!!!

 

If I'm understanding your question right, you have an issue with your high pressure fuel pump (also called simply HPFP), which you found out after you took the car to the dealer after some problem with your transmission and shifting? The issue that you had was that you accelerated to 4500rpm, but then the engine free rev'd to 8000rpm with out the car accelerating? If that's the case, that sounds like a slipping clutch.

 

Yesss this is may issue.
Believe me i spent my last week with the agency and they cannot recognized what exactly the problem .
Before yesterday i faced another thing - shifting was OK til i reached 140k\h then the speed does not want to increase i.m trying but there is no shifting.

Today my agency finally agreed to change gearbox oil . But do U believe that oil out of stock on all BMW agency around my country . I have to wait 3 weeks till oil arrived from London !!!!

 

Hi

If the problem was from clutch , what do you think is peter to replace it with OEM part or should i take performance part??
If i will take performance part , any recommendation ?