Loss of power under heavy load

Hey folks..

This may or may not be in the right area.. but...


SPD downpipes, CFV FMI, BOV, COBB stage 2.

Not sure if anyone else has experieneced this. Under heavy load, when I really push the vehicle up to 5/6k RPM, I get a check engine light that flashes and the vehicle shakes a bunch. This did not happen before the mods or tune. I'm running the latest firmware of COBB. I do have spark plugs to change, because I did have a misfire code that I read after the firsts occurance. While at idle, I frequently get a rough engine shake but the check engine light only flashes if I push the truck and when it does flash its like I have half of the engine power (limp mode) and I have to let it naturally slow down by itself to about 45/50 then the engine light stops flashing and I regain full power.

Thoughts?

1. I may take the tune off and try it out
2. I may take the tune off and take it to ford
3. Regardless of the two above, I'm not taking off the FMIC/SPD downpipes

Remove the software tune as a first step. test it and see where you end up. The downpipes and other hardware upgrades shouldnt cause a misfire code

Roger that. That was my idea, along with these spark plugs.