Hi, I have a Mini Cooper S r56 2011 ,n18 engine and I scan it because it is having a problem when is cold and i star on ,the rev when up and down and it look like in some times it going to turn off,until she warm up that is normal but the check engine is on ,can some Help me the codes that gave me where P0300,P0301,P0302,P0304 i would appreciate the help....

 

Misfires are the hardest thing to figure out on any car. It could be anything from fouled plugs, bad coil, to the HPFP. You have to start with the basics and begin diagnosing. There's no magic formula to figure things out. Good luck and make sure you report back.

If you're hungry for some reading material, do a search for P0300 and search titles only. That should keep you busy for a couple of hours.

 

HPFP is less common in N18's and hardest to replace of the three common issues.

I'd start with plugs and see how those look. If you plan on replacing anything, again I'd start with plugs, then coils, and lastly HPFP.

 

Thanks i would let you know

 

how many miles do you have on the car? I would start by checking the plugs first. does this only happen when it's cold? than it warms up and no more misfire?

 

You may notice the problem when you pull out the spark plugs. Completely fouled up and check your coil packs for rust on the sleeves. Check and replace plugs, coil packs if necessary and only use quality products.

 

My 2011 S had the same issue....multiple misfire codes, lean condition codes. HPFP was the problem.

 

very hard to diagnose hpfp I would rule out the obvious first