Hello I installed the GTRS turbo here is a list of what I have...
The car: 2001 Audi A4 1.8T

GTRS Turbo
ATP Manifold
Unitronics tune
APR exhaust
greedspeed FMIC (2" piping)
440cc green tops, 3 bar FPR
3" VR6 MAF housing stock MAF sensor
Nuespeed Tip (intake goes K&N filter-> MAF-> TIP)
Turbo xs MBC (in parallel with N75) set @ ~21PSI
NKG BKR7E spark plugs.


The problem I have been getting is it is running lean, when I go WOT the O2 sensor reads .90 which is about 13.2:1 A/F ratio (pretty lean) I dont know what could be causing this, also My MAF reading is about 170 g/s at about 6200rpm's so I dont think it is the MAF. also I get a lot of misfires at idle (almost one every second) when the car is warm...

what do you guys think it could be? I think it might be the injectors but before I go and buy new ones I want to make sure. is their any way to check them?

thank you

 

coil packs?

 

Those would make me run lean????

 

I was gonna say the same thing, I'd check the coil packs first.

have you vag'd it?

 

I dunno if they'd make you run lean, I can't see how. but they might be causing your misfire at idle.

 

Yeah i have VAG'd it I do mot get any codes and it doesnt misfire during driving/ in boost, I am not really concerned with the misfires as much as the lean condition.

 

Well, 13.2:1 is just above where you want to be, and I don't think you should be worried. If you start hitting 14.0:1, then you should start being worried.
You should check with Unitronics and see what their tune was setup to run. Maybe they set it to got that high, or your car has some slight change in a parameter that has let the AF creep up higher.

 

13.2 is very lean i would be scared. i tune for 11.5 at wot.

 

I thought a 4 bar fpr was needed for BT? Is the current 1 adjustable?

 

you need whatever the sw is writen for.

Green tops suck btw, the spray pattern is all wrong for the 1.8t and many have start up problems with them. Some have had no problems but i wouldnt use them personally.