Leaking injector? (pic of pistons)

[KnockTurtle]

TU3 engine been causing me lumpy start up.

[KnockTurtle]

I put the engine back together but still having the lumpy start up (only for approx 5 seconds).
The piston on the right was thick with carbon deposit (compared to the others) and has a small clean patch near the inlet valve.
My thoughts are... the injector is leaking petrol when the engine is off and the leaked petrol has soaked and softened the carbon resulting in the clean patch.

[KnockTurtle]

I've had the car since 2010 and the inlet manifold hasn't been off in the time I've had it.

[KnockTurtle]

I think its the lighting making 2 and three look clean.




I didn't get it skimmed

[KnockTurtle]

I have a fuel pressure tester on order.
I might pull the injectors out this weekend.
If I disconnect the coil then turn the engine over for 10 seconds then reconnect the coil, it will start perfectly.
Its not losing any water.


Thanks for all the replies

Edited by KnockTurtle on Saturday 22 July 17:23

[KnockTurtle]

All the pictures are from the same occasion

[KnockTurtle]

I'll pull the fuel rail regardless, easy enough job, cheers

[KnockTurtle]

I got the fuel rail out and found the leaking injector on the left cylinder.

https://www.youtube.com/watch?v=0SxM-fs8XU0

Got a new part ordered ready for tomorrow.

[KnockTurtle]

My injectors are manufactured by Valeo, are they interchangeable with Bosch?

Not sure if this link will work:

https://www.123spareparts.co.uk/car-parts/PEUGEOT/...

Part numbers are same 1984 EO.

My injector:

Edited by KnockTurtle on Sunday 23 July 21:50