Got the car on a dyno after my cam install, and the numbers are pretty low. 250hp/260ft lbs. I should be at least 275hp, and over 290tq from what I've seen.
He showed me that there was a difference in fuel trim between bank 1 and bank 2 of 17%, so it would be pointless to try to get power out of it until it's fixed. It's not throwing any codes though, which is good... but makes finding the problem a little harder.
He got the idle and the driveability locked in, though. Full throttle AFR's are 12.1, it starts right up and idles at 800, runs really smooth and feels like it pulls harder than it did before I put the cams in, but the numbers on the dyno are definitely off. When I'm driving, I don't feel a miss or knocking or any breaking up. It's not blatantly obvious to me that there's an issue.
He thinks it's a spark problem and told me to put new plugs in and front O2 sensors because maybe I fouled them up by running the car untuned for a few days. But I don't know if that would make a 30hp difference. What else could cause a bank-to-bank difference in fuel trim like that? An exhaust leak on one side before the front O2 sensor maybe? I just want to cover all the bases before I go back and try again next week.
I like MM though. It's a mustang forum, and, the only one I know of where I could tell you to fuck off.. or to suck my dick. Or, to tell you you have a small penis or that I fucked your mom last night and it's ok.
It's my first run, I don't have a baseline. But this shop tunes mustangs constantly, the tuner is very reputable, and he said I should be making at least 270hp at a minimum. He's gonna charge me next to nothing to run it one more time after I fix everything just to make sure.