Maft Adjustment Questions

[black91awdturbo]

I know there is a thread with a pish posh of all kinds of info in it but its so big its hard to pull a good answer out of it. Here is my question I am running Maf-t in blow through, the car is all stock minus the dejon upper,rre lower ic pipes. I switched to blow through because when I got this car it had a bad maf on it and I traded some left over stuff for this setup. I dont have a logger just yet but I do have some stuff coming soon. Here is my question if I add any value to the Aux it will die right away. So I zero'd that out and I put the base to 2 and left every thing else zero'd. The car pulls strong and hard intill like 5k then it seems like it hits fuel cut. Idle is good 950-1k. No matter what I do with the dials it seems to hit this brick wall. Any one else ever see any thing like this and if so what did you do to clean it up? Any help would be great.

 

[92AWDHX40]

Aux whats hooked up to it, its for extra stuff the purple wire? leave it untouched.

 

[black91awdturbo]

Thats what I thought but the tech at full throttle said it should be Aux 4, base 2 with every thing else zero'd.

 

[Gstclipse69]

That is correct for your base settings on a 2g. Aux=4, Base=2 That is simply for your injector compensation which is correct for stock 450s. As for the problem at 5k, how much boost are you running? If it is fuel cut then I would suspect a boost leak. Have you checked for boost leaks?

 

[black91awdturbo]

Its in blow through so boost leaks should not affect it like this, but to answer your question yes my brother and I did check and we found one at the biss and changed it. But since this post we had a friend come by with a logger and the wot gains we very very rich so we had to lean it out and the car pulls great for a T25 Car.
Now for my next question every since I got this car it would sorta hit what I would describe as a soft rev limiter at 6-6500 rpm's. What I mean is the car will not go up into the rpm's any further and it drops back to 5k. It will do this over and over and if you hold your foot down it will pull hard right back up to 6k and gently fall again. I know my Vehicle Speed Sensor is bad because I always get shaky tach and speedo readings under Wot and have bought a new one and it should be in friday. But does any one have any other ideas what my cause this I have been into dsm's since I have been 16 and never seen this issue.
Thanks,
Dan