MeehowTT

It's a 2001 225 Coupe with a MTM chip, have a boost gauge, 3 gear WOT was around 20psi, leveling out to 16-17.

Now the car cant hit 15? More like 12?

jeebus, so I took the car to a friends shop, he smoke tested the thing, nada, no leaks

ran it through a computer, no codes.

swapped for my original ECU, drove the car, boosted the same amount, it's almost as the chip programming vanished?

TTschwing

If it's not outputting enough, it will tell the ECU to WHOA on the boost..

MeehowTT

or that was my experience. I did unplug it, and ran the car...same thing

TTschwing

Specially if you unplugged it and no change...
How old's the temp sensor? Bad one of those can hold things back by telling the ECU the car is hotter than it really is..

MeehowTT

and I think mine is the correct "green top" spec, Sean and I changed it a while back

467cubes

I am having the exact same problem and my maf is new...

MeehowTT

all this steamed from me hitting a pretty big rock, that bent the pendulum mount, and ripped apart the under tray. I inspected the post cast O2 sensor and found nothing.

any ideas?

TTschwing

That could have been damaged except maybe the SMIC's and hoses, but they're off to the sides..

467cubes

Has anyone figured out what the problem is here?