Hi folks!
I have an old Volvo (B21A) with 300000+ km on it. I think that it is becoming more and more sluggish. It lacks that ooomph! :-) Ignition timing is working, both mecanical and vacuum. Fuel mixture is ok. I have not checked the compression yet, but it was OK some year ago.
What should I suspect at first? Worn camshaft? Bad valves? Piston rings?
Andy