hi everyone i bought a 2002 st170 now when i bought it it was very nippy but everyday it seems to be losing power and get slower and slower, i had the p1518 problem which the car had on when i bought from the dealer unknown to me he had took the bulb out of the dash so the engine managment light didnt come on, i only found out from putting it on diagnostics machine, now i have soldered the spring back into place so it cant jump off but doesnt seemed to have helped