Hi PaulInfinicar said:I had the M5 Touring Rolling Roaded at the weekend and it made 298.1 bhp - I dont trust rollers as far as I can throw them, but it was free so I didnt care - the operator said all the M Cars (especially the E34 M5 and the E36 M3) never make anywhere near the manufacturers figures. He did comment that my car was lower than normal (about 310 for a 3.8) - he said it was overfuelling (which I kind of knew see previous thread)......
Ive changed the temp sensor and did the ECU unplugging trick, both of which obviously havent worked......
Its going to the 'Ring on Friday.....doesnt appear to be consuming unusual levels of pretrol, so I think Ill just live with it......unless anyone has experiences to share........
These things do run rich when they get hot.
I had intermittant problems with mixture & overfuelling.
I did the temp sensor & wiring which was brittle anyway.
I had the fault codes checked on the DME & it listed a o2 Lambda error.
Cleared the fault & wiggled the wire. No more fault.
I put a new flylead & connector on & that cured the problem.
Poor connections & bad o2 sensors will cause overfuelling in many cases & E34 M5 are susceptable to this.
Whilst im sure that this aspect would not cause problems on a few laps round the Nurburgring, I would check the above.
Abit of work with a soldering iron & some shrink wrap & you are sorted.