86 k km
Major tune up at 60 k.
Spark plugs are PFR6Q (Audi logo). The color is roof tile red.
Bentley manual lists Bosch plugs that hardly exist, or NGK copper.
PFR6Q are not listed for BEL engine. Sort of confusion…

The only component not replaced is the fuel filter. (stuck inside the bracket, with bolt frozen in the nut; not figured yet how to take off
as there is no access to the nut).

I’m wondering what could an eventual fuel starvation cause – any DTC or only power loss?

 

Are these check engine lights or any other misc. light signals very common on all Audi models regadless of year? It's like you sneeze on itone day and you'll some kind of malfunction or check engine light.

My car just came back 2 days ago and had 25k mile service and now I have that light. [:@]

 

Try some PB buster on the bolt. It does wonders at freeing stuck stuff.

PS The PB does not stand for peanut butter.

 

what was the code?

did the car run rough? does it run ok now?

 

He did not give us the code but said it was intermitent misfire so I suspect it was something like P0300 -16684

 

I have the codes (all the scan reports) saved on my laptop. Could mail them late today.
Generaly I do scan the car 2x per month, intermitent misfire DTC are very common. In running mode/engine -idle , measuring blocks there are never misfire codes detected.
The car is runnig just fine. (Did not run rough while the CEL was on).

Fuel filter - I have not figured yet a way to get acces to the nut of the bracket, just no space.
Speaking about fuel filters - it might be not so popular to change them...

P.S. used PB many times - in vain - just no space to grab the nut with any tool..

Thx,