[hc24]

Hello,
I am currently completely stuck on what to do! I have a mini one 1.4 (peugeot engine) with a misfire on cold but when it warms up it runs like a dream. This car has no codes stored within the ecu. The plugs have been replaced as well as a coil. it has also had new inlet manifold gaskets, timing chain and all the kit, and very recently a head gasket replaced. I can access live data on the scan tool and is brings up a misfire on a cylinder but every time its different!

Completely stuck. I would appreciate some help!!!

Cheers.

 

[hc24]

02 sensor
coolant sensor
would be worth pulling injector rail out with injectors on it crank engine see what fuel pattern you get,should have a atomised gas ball and all 4 the same,
crank position sensor maybe breaking down while cold when hot they expand and read correctly
what diagnostic tool are you using
on live data can you check vanos positions prescribed and actual see if its a timing problem/
i use autocom cdp on live data works well
below are screen shots of a 2008 mini 1.4 one with 55k after it had a new timing chain and 02 sensors

I can get a live reading of the engine temp on launch diagnosis, so surely it cant be temp sensor issues?

also is those readings are the correct readings on what they should be?

Cheers for the help.

 

[hc24]

Hello mate, took it out for a drive today and it does seem to be hunting for fuel when cold, however when it is at optimal temp it still has a flat spot. Went into live data and checked all the lambda readings and they all match up to yours, knock timing seems all good. Compression is very good with 260 on each cylinder. the only thing i havent checked is injectors but this seems to lead me more towards an issue with the throttle? what do you think?
Thanks for the help.