Originally Posted by ReadRam
OP were there any other symptoms from the cracked exhaust manifold as i get intermittent cel #8 misfire?
Heavy pinging under load. Slugish performance. Rattle sound coming from the cat sometimes during idle. Oil usage with no external leaks to account for it. The #8 plug was not excessively fouled compared to the other cylinders but the plugs were worn and due for replacement.
The truck is in very good condition with 108k miles on it.
I do not drive the truck daily to work and am doing a little bit at a time. I now have the plugs, wires, headers, and rockers installed. I hope to get time to do the intake kit install today.