Hi there first time on here so hopefully say the right things and receive helpfull answers . I bought my beemer 6 months ago and was very happy with it it had been re-mapped to 200 bhp and was very fast off the mark however yesterday having some free time i decided to install new glow plugs in time for the colder weather . After puting every thing back together (valve cover and hoses) i started the car and drove off to find there was no turbo . After another look around the engine i discovered 2 of the 3 wires connecting to the plug which connects to the MAP Sensor had broken clear .
Today i stripped the valve cover off again then had a mechanic friend re-solder the wires in place and reconnect . The test drive was much better with the turbo working again although not so much pull as before . Im wondering if it is back too its original BHP ?
Thinking then maybe it might need re-mapped i drove home , but half way i came off a junction and no turbo again.
Can anyone throw some light on this ...
Since i wrote this i have more weird stuff happening .. the cars turbo is responding after a fresh start in 1st 2nd 3rd gear but from 4th it comes and goes then nothing in any gear then responds again .
i have removed and clean the erg valve which seems ok