I lashed the valves on my CompCams 252S cam (factory settings 0.010/0.012) to 0.010 and 0.015. The idle is nice, but now I have a high speed miss. It feels like a spark plug is grounding out. This only happens under load and heavy acceleration. I just want to confirm whether it is rrelated to the valve lashing or not.

bwhitejr

_________________
'72 Duster (Performance 360)
'83 Ramcharger (Performance 318)
'80 TrailDuster (360)
'80 D-150 Truck (See Below)
CompCams 252S, Holley 390cfm, Offy manifold
Ported, Polished and Gasket Matched
P4286813 Springs,0.040 Overbore,
0.090 Shaved Head

I would look elsewhere for this problem — I think if it were lash-related, it would be more uniform across all cylinders. If it feels like an ignition fault, it probably is!

_________________
一期一会
Too many people who were born on third base actually believe they've hit a triple.

If it wasn't there before you adjusted the valves, it is most likely related to what you did.

Make sure you didn't knock a plug wire loose.

Possibly a tight valve.

_________________
Official Cookie and Mater Tormentor.