Hello Don, I was reading the post you posted about stumbling. My truck stumbles when the accelerator is pressed aggressively only. No matter what speed I'm going it stumbles. I have changed the fuel filter and wires with no improvement. The truck now turns over during starting too long for me. It used to start instantly but now its intermittent. Once the truck stumbles and clears up it fly's at full throttle. I do have detonation but I think its a false reading with the fuel lines hitting the trans tunnel.
Just would like your opinion on my systems.