What is life like with your car? Let us know and win £500 in John Lewis vouchers | No thanks

What's causing my BMW 3 Series to misfire?

I have a BMW 3 Series automatic. Presently, the car misfired on the first start of the day, but clears after five minutes. I’ve replaced two coil packs, injectors, plugs and the high pressure fuel pump, but it still happens. Any ideas?
Also can I fit 225/40/r17 tyres on 8.5 R17 wheels?

Asked on 5 September 2013 by Tonyg

Answered by Alan Ross
Well ref the misfire ,have you had a diagnostic carried out at all? And if so what fault code did you get. If it was P1554 then it may well be that the VANOS system is faulty. Other than that we would also suggest that you check the ECT (engine coolant temp sensor.

As for the tyres, if the size is 255/40/R17 then yes they will fit on 8.5 R17 wheels.
Similar questions
My 2003 Peugeot 206 1.4 diesel has developed a misfire. I took it to my local garage, but they have not been able to find any fault as the diagnostics machine was unable to establish a connection. Do you...
I own a Chrysler Voyager (2000 model). When travelling over 3000rpm, it leaks oil over the top of the dip stick. It has also developed a misfire. Any idea what could be causing this?
My Skoda Fabia is misfiring. A mechanic has cleaned all three spark plugs and checked the coil - both are okay but still it is misfiring. What should I try next?
Related models
Superb to drive. Great handling and steering. Upmarket image. Economical diesel engines culminating in amazingly efficient 320d Efficient Dynamics at 109g/km of CO2.