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When you use a MAF you aren't taking into account the absolute manifold pressure for fuel tuning. When in reality you are only measuring the amount of air comming in. So unless you modify the signals from the MAF (which you are doing with the TT) it is harder to adjust the amount of fuel going into the engine.

With a MAP based system you add fuel based on pressure not on air flow.

I think it may not have been the bolts solely, but a combination of things :-/

turbotuner, on 20 November 2009 - 08:37 PM, said:

I know it's normal ;-)

Map tends to be better for big boost cars from what I have seen.(Only from what I have seen, I have never modified a MAP based car) I mean when you look at supra's you don't see MAF's on them. From what I have gathered MAF's are flakey :-/. Where as a MAP is based on the absolute pressure in the manifold it provides a better way to manage things on the car.


Isn't there a lot of things controlled from the MAF? As in, the MAF can be the reason for things like timing pull, (aside of the knock sensors), and goofy AFR's?

I just seems to me that if you could do away with the MAF and go with MAP, that some of the oddities of these cars would maybe be solved? You can go MAP when you go standalone, right?

Is there a way to go with a MAP sensor on the USB TT? Maybe the goofiness is due to the MAF?

Also, yeah my car goes to almost straight O2 on decel.

I can't imagine that the pulling was due to the bushings you had on there. Now what probably happened is when you pulled the caliper off, you fixed that it was stuck. Possibly.

And... it is braking.