well thats a pretty good comparo you have then. If you had switched to vxcf7 then you should have had the later ficm program. I cant quite remember when it came out but the best would be to check it with an ids, or something else that can pull that info to be sure.
If your truck ran fine with stock ficm vs php ficm then it does sound like the php tuning is at fault. What im wondering is how your truck runs with ficm correction disabled on the stock ficm. Thus if it was running how the php ficm does, then one may question if the php ficm drops ficm correction, or has a problem with it.
On a truck with no sticktion and good injectors disabling ficm correction should make minimal to no difference in how the engine runs, thus if some have great results with php ficm and others, not so much. Then perhaps there is an issue with their ficm correction portion or their inductive heating portion.
The thing that i also wonder about your truck is that, i've had my evo on my truck in cold weather -30 c, etc and i never had any problems on the vxcf7. Of course i had my truck plugged in when ever it droped below -15c and i run 5w/40 oil.
I'm actually debating about getting a download for the php ficm, my truck has the vxcf9 currently. I also have a ficm out of a 04 truck that i might put in and try first though. It has no inductive heating, but it may also be so early that it may have pilot injection (not sure if thats in the ficm or not). Just need to find someone who knows how to decipher what ficm cal amz2al09 is.
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