I got my engine replaced a couple weeks back and had her rolling roaded today just to check out the fuelling as my ECU is running a Unichip still mapped to the old engine. Mapping was done by Owen Developments.
The old engine was making 233bhp @ 5859rpm and 251 lb/ft @ 3544rpm. Today with the replacement unit the results were
183bhp @ 5826rpm and 215 lb/ft @ 3200rpm
![](/forum/images/graemlins/confused.gif)
The new engine seems to run perfectly, but just doesn't seem to have as much grunt.
The operator did say that it was fuelling quite rich at 7% whereas normal is around 4%, but what that means in terms of AFR i have no idea
![](/forum/images/graemlins/confused.gif)
Regardless, I wouldn't have thought that a little rich running would cost me 50bhp.
At the same time as the engine swap, I also had a Pace FMIC fitted so I would have expected at least to make the same power as the old engine. Ok, the Unichip needs a bit of remapping, but again i wouldn't expect it to cost me this much in terms of power loss.
Does anybody have any ideas as to what might be causing my low figures? I'm still running the EBV and I'm thinking that either its probably FUBAR or i have a boost leak somewhere? Unfortunately, the rolling road i went to wasn't able to monitor boost levels.
Finally, can anyone tell me what to look for to see if the Unichip is stil fitted? Reason i'm asking is because my car went to FAST initially and when i kicked them into touch (for various reasons) and got the car trailered to Motormech instead, it was missing a few things.
![](/forum/images/graemlins/grin.gif)
Cheers,
Den