Having issues with misfire under load. Full throttle seems ok. Codes 542 and 543 came up. Compression is 130 psi across the board. Cleaned maf, no change. Changed msd coil to new accel coil. No change. 02s new last year, fuel filter is new, 255 pump new last year. Fuel pressure it idle is 34-36, 39-42 with no vac. I checked the timing cover ground and it was loose, tightened wi no change. Car has msd pro billet dist. with Napa pip installed, when cold runs great as soon as it warms up over 180 has a part throttle misfire, very evident when in 4th gear at low rpm. I swapped the oem dist. Which also has new pip back into car, and the misfire is all the time when warm, even at full throttle. Leaning towards tfi, or ccrm, based on the codes pulled, any ideas? Mods as following
Bbk cai
bbk 75mm tb
trickflow street heat iintake
no smog, ac or ps
evap canister removed
msd cap and rotor
ffrp wires
mac equal shortys
mac h pipe
flowmaster 10 series mufflers
Bbk cai
bbk 75mm tb
trickflow street heat iintake
no smog, ac or ps
evap canister removed
msd cap and rotor
ffrp wires
mac equal shortys
mac h pipe
flowmaster 10 series mufflers