I will try and explain this as thoroughly as possible cause it is a little hard if you haven't experienced the problem yourselves. I had an apexi AFC installed and tuned about a year ago. From the dyno tune, the power which was produced was 250 hp (roughly 160 kw). That was with a boost control, intercooler, greddy bov, turbo back exhaust installed. Bearing in mind, it was boost was only adjusted at 8psi.
Now, recently I have had a problem driving on freeways at approximately 100km when the car starts to kind of stop start. It feels like the something is pulling it back and only last a couple of seconds and then will happen again at the same speed. I previously had a service and the guy who serviced my car adjusted the fuel cut defender on the apexi and that seemed to be ok but over 100km, it still gives me the pits. I rang up a dyno tune guy (another one, not the one that tuned my car) and told them and they said that the apexi afc is not really compatible with the skyline r33 95 model's standard computer and suggested I remove the apexi and boost control to make it more efficient. Now that doesn't seem right considering many posts on this forum tend to express how great the afc is. I don't want to bring it back to the original guy because it is too far and I really don't have time but I am not too sure what the other one is talking about either so does anyone have any ideas?
Does anyone have this problem with their car underperforming?