PO300/PO300d CEL

[Englishdavid618]

Afternoon all, my 2022 Alan Mann had a PO300/300d CEL come on on Sunday.
Previous to my ownership the car was only ever started regularly but never driven.
With a few weeks driving now I just got over 300 miles on her and the CEL came on .
Looks like it’s a non descript miss-fire.
She goes into the dealer tomorrow to figure out what it is.
Starting on Sunday she did have a “stumble” but that was maybe for 2 secs - then cleaned out.

Anyone had this code, wondering if it’s likely something simple?
Thanks

 

[dbk]

Fouled plugs? Lotta cars that don't move and just get idled end up fouling them.

 

[Englishdavid618]

Fouled plugs? Lotta cars that don't move and just get idled end up fouling them.

Yeah could be, I wondered that. Guess I will see tomorrow when she’s at the dealer

 

[nota4re]

Fouled plugs? Lotta cars that don't move and just get idled end up fouling them.

Very likely. ECU strategy at start-up is to dump extra fuel to ramp-up the heat (efficiency) in the cats and will then stay in an open-loop cold start mode until coolant temps start coming up. All of this is inconsequential during a traditional run/drive cycle... but when the "cycle" doesn't include driving time at normal running temps (AFR's), then the plugs can easily become fouled. The plugs will tell the story.

 

[Nafod]

I was told during delivery that early car had a lot of fouled plug issue due to idling the car for a time( no specified time). The cure that was offered by the delivery specialist ( Thank you Steve) was two quick revs to 4k rpm flowed by engine shutdown. Have done it for 4 years, no problems with the engine. Was told that changing out the plugs, was a challenging experience.

 

[Englishdavid618]

Thanks all, yup was the plugs. Dealer said Ford had a memo specifically on it.
Waiting for plugs to arrive now then hopefully all good again next weekend.