Fault with 2 cylinders on a 807 Renault and Weber

[Lyngeled]

Hi
I have found a fault on this engine, I knew it wasn´t all ok (uses too much fuel), and there is two things I've noticed now.

I tried too adjust the idle mixture on all cylinders but on the two in front, 3 and 4, no changes was heard when the idle mixture screws were turned. Then there was click sound from the top where cylinder 3 and 4 are. I have heard it before but I thought it was normal. Now I think those two things are related.

Anyone have ideas?

Regards

[Lyngeled]

...
The click sound is not loud, so I hope it's not a big problem. I Haven't heard  it when driving. I can only hear it when standing beside the engine.

I thought that if nothing happens by turning those idle mixture screws the fuel must be delivered from a following curcuit. It's starting and running fine.

Regards

[jbcollier]

It is very difficult to diagnose without being there.  Carbs are always last on the list when making adjustments or troubleshooting.  First, make sure the engine is up to snuff:

- re-torque head (807 engines require regular re-torquing)

- adjust valves

- check compression

- check timing and advance

That's all good?

Now you can look at the carbs.