Im having an issue with cylinder #4 as whenever i race the car and make a couple of stops and leaving the car at idle for 5 mins in the garaje, spark plug 4 (NGK BP5ES) comes out fouled and sooty. I have both front and rear roundtop su carbs at 3 turns clockwise. All of the other plugs are burning correctly. Could my car be running only on 5 cylinders? mechanic says i need a valve adjustment but cold and not hot. Do you concur???? the car does not have the original cam but a Schneider 274F to compensate as my engine was bore to 2.6 L and not 2400 cc as original.

http://schneidercams.com/274FL6.aspx

Is a valve adjustment at cold required better than Hot?

Injector ticking? listen to it compare to others

Spark plug firing, put fresh plug on wire and lay on top of valve cover to confirm.

I adjust valves cold, also do a compression check.

Edited February 9, 20178 yr by Dave WM

Hard to do a consistent "hot" valve adjustment since by the time you get to the last one it's a whole lot cooler than the 1st one you did. The valve train wouldn't change temp during a "cold" adjustment unless you got really warm hands.

He's got carbs, no injectors. I do my valves cold too then come back and check them hot. One or two may need readjustment when hot.

You will have different specs for a regrind than stock cam. Find those numbers first.