P0 rforrnence nrc IJI-ems related In the cylinder head can l.l:Ll.tlII'|r he diuanaeed by n |:t.'|l'I'|I'Jl'£:e:Ir.N'| tie-.1, nr nnice |'Jrul:|In-rn-i which
can he traced to the 1:0-p end with a saundlng red er i'I1EfI'||:|»:-¢m'.I|:,
Law Camnretsicn
Celrmnrusiun too I-Hgh
1. Valve:
1. Excessive carbon bt.|IId-up an pluten head er uflrltbusliurl