Hi guys i have a 2010 mini base and still dealing with a misfire had a burnt valve in cyl. 1 so far lapped new valves in did timing new plugs coils and injectors new intake manifold new catalytic converter and both o2 sensors new cam sensors compression across all 4 cylinders is 205psi good fuel pressure not sure what direction to go and have about 15 days to figure out to get emissions test and plates

 

Pull the spark plugs and inspect. Does the inspection suggest engine is running rich? Post pictures.

You mention the plugs and coils are new. Post brands, types, and plug gaps.

274E


2772


2773


2782


2783

 

thank you for the response i will pull plugs again tomorrow and take some pics last time i had the plugs out they all looked like they were running on the lean side as far as the brand of plugs the guy i bought the car from bought the coils and plugs before i scoped it for him and found out the valve was burnt out the plugs just say iridium on them

 

If you can't reliably verify the age of the spark plugs and coils, it would be wise to simply replace them and then go from there.

 

i work with the guy i purchased it from and he purchased the plugs and coils in April and the car never was driven other than onto a trailer to bring to my house so i do know for a fact they are new but knowing the guy it was probably the cheapest stuff he could get for the car off rock auto

 

 

so that being said you still recommend getting new??

 

Heres a pic of the head when i had it off




After hot tank

 

If I thought that the plugs and coils were cheap aftermarket parts, I would replace them in a NY minute.

And the refurbished head looks great. I'm looking forward to you solving the misfire issue, and the smooth running engine puts a smile on your face.

 

what brand plugs would you recommend im kinda tight on funds at the moment so i will get plugs first and then coils if need be. Being a body man I did a custom job on the outside to gift to my 16 year old daughter but definitely wish I would’ve got running right before that🤣 and yes the smooth running engine will definitely put a smile on my face and my daughters aswell cuz i will stop telling her she has to stay home so i can work on her car🤣

 

Wow, looks great! Your daughter will love it.

I'm an NGK spark plug fan, but they are pricey. Others may be able to guide you to good but less pricey alternatives.

 

me aswell i have always put ngk in everything i own so ngk it is will have them in a couple days and then i will tear back into it also got a fuel filter coming no clue if that has ever been changed. And yes she does love the car she did ask if i would paint her wheel black so guessing that will b in the near future aswell 🤣

 

Cyl1

Cyl2

Cly3

Cyl4

replaced them with lazer iridium ngk and also put the old coil packs on instead of the cheap aftermarket ones so far the light is off and haven’t counted any misfires but need to take it for a drive

 

Nice start! Good luck.

 

thanks but back to the drawing board engine light back and back to missing after a good drive

 

Misfire in cylinder 1 as before?

 

yes

 

You may want to swap fuel injector 1 with one of the other fuel injectors to see if the misfire fault code follows injector 1.

 

ok i will either try that later tonight or tomorrow morning depending on when the kid decides to be home with her car lol

 

The black soot on all 4 spark plugs suggests a rich condition or that all four cylinders are experiencing misfires. Curious.

 

it does have a code for combustion misfires in several cylinders

 

Did spark plug 1 look more sooty or different in any way from the other 3 plugs?

 

they all look pretty similar to me but
left to right 1-4

maybe 4 looks a lil more sooty