Good morning, I'm Having Trouble with my 2008 Clubman S. I was Driving on a hwy and car died, went into limp mode, had to wait about 10 minutes and it restarted. It died a couple more time on way home.
Engine codes showed misfire, coil. I replaced spark plugs & coil, it fixed all codes. still dies. I took it to a shop, they cleaned the throttle body, still dies. It does not show any codes, it just dies, wait 10-20 minutes and it will start. Shop can't figure it out. Engine turns over, sometimes sounds it wants to start ,but won't.
Is there a relay that could be doing this? Thanks for looking

 

Possible to be the low pressure fuel pump or high pressure fuel pump

 

Thanks for the reply.
That's what the shop said was possible but he never could get it to die to check fuel pressure. It will run fine all day, till it dies.

 

check the fuse box for water damage and/or corrosion.

 

Ever have the walnut blasting done ?

 

Fuse box looks good, swapped relays around. No luck
As far as the walnut blasting, no. But I use Sea Foam Treatment.
I can drive around the side streets, but when I get on a main road and stop at a light it dies at startup. wait 10 minutes, it will start.
I'm thinking it might be the fuel pressure regulator. Is it on the low or high pressure fuel pump.
thanks for the info

 

Sea foam treatment how?
In fuel tank or thru vac lines ?
Mileage please.

 

Both, 64,000 miles

 

I am inclined to think walnut blasting needed for this reason.
Cool down = will re-start.

What happens with carbon buildup is that it can get red hot thus ignighting air fuel mix both prematurely and when it is being prepped to be sent off through exhaust.

When you shut down, the carbon cools down allowing just the spark plugs to ignite the fuel, then once the carbon buildup becomes hot enough again, it starts all over....

I would not think a fuel pump, low or high pressure would "repair" itself after a cool down period, these are more mechanical in nature and for the most part, either work, don't work well or not at all, all of the time....

 

That sounds very good, I'll give it a try. Thanks

 

Can inspect valves with a scope....