afr on wideband at wot is 10.0 at 20-21 psi peak, 10.8 max holding 15-16 psi until redline.

I know fuel pressure is suppose to be at 58 psi at idle, Im 60-62 at idle. I use a gaz pressure gauge to check it (Not the best quality, a canadian tire one lol). Fuel regulator is change since 1 years ...

I read everywhere 93 tune give wot at 11.5 to 11.8.

Im Stage 1
Stage 2 w-g
Downpipe no cat
STOCK INJECTOR
255 fuel pomp

Why im getting 10.0 to 10.8 wot afr max while peaking 20 psi , holding 15-16 to red line .

I check my piston compression, all 4 to around 150 psi. PLug ngk 4603 gap at 0.35 ...

Hum.... tps sensor Duster360, that is maybe my problem. I read about it. But never got rpm on idle variation, even while playing with wires, In datalog, im idle at 0.7059 volt , Crousing around 2v. Wot is around 3.76 v i think...

stft -25 to +28 % ??? it can be related ?

i have the same problem, i bought my predator from dsp about 8 month ago, Never had the perf 93 tune work well.

Modif, Stage 1 pcm, Stage 2 w-g, cai, Downpipe, o2 housing, 255 lph fuel pump, aem Wideband, dsp.

Anything over 2500 rpm is not bad, Under 2500, i have random lean-Rich Cut, Strumble ...

When u put a new tune in, It is really important to go stock backup before?

Much Much Much Better

And is not 100 % accurate, since i get 347 torque, it`s a calculation only.

A other thing too, desired torque is use to limit the boost in 1st and 2nd gear if your still on ecm controled boost...

Pm Send

not able to load it .

Calib is my car serial number , when it should be 04510055ae

well im gonna send u my backup tune, this gonna help you.

The other one was , a tune brian did to turn rear o2 off, well i just left the rear o2 connected to avoid check engine, because both was doing the same ...

Haaaaaaaaaaa Nice, Maybe With the ton of job Biran had to do, he forgot to copy past someting. Btw what did u find diffirent from the canned tune, just by curiosity ?

Thanks a lot Johan. im gonna go road test this, and give you new.

I found other diablo user who have this problem to ..

http://www.srtforums.com/forums/f24/sho ... ndex3.html

I hope to have some help.

Here my mod :

Ecm : stg1 With Diablo tune Rev.17 (With stage-2 scale wg duty cycle by Biran)

stage 2 wg
Walbro 255 fuel pomp, Stock Regulator.
Stock s1 injector
94 oct gaz.

The winter in colder temperature, car was alway nice .
Idle afr 14.7
Crousing afr 14.7
wot afr 11.0 at 16-17 psi No ...

Well 20 psi is a lot, specialy with 91 oct gaz, Be sure to log st knock and lt and check if you have knock too (1 to 3 max is acceptable, Specialy on shift) Get a wideband to be sure to be max 11.5 to 12 afr. run 18 psi max if u dont have a new fuel pump.

U can try to remove the no. 21 fuse on the ...

because the tune u put it`s set for stock turbo and scale for stock injector. So the pcm doesnt give the good gaz. stg1 maybe run because it`s already pig rich but diablo tune are on the edge. be sure tu have rev.17 update, because i know first rev was modding the iac (Idle air control valve ...

i would also buy a walbro 255 fuel pump. Since i have this fuel pump, i can hold more boost with near -1.0 afr. Rewire the fuel pump with 14-16 ga wire, gonna make you -0.5 richer on afr too. Other option will be stg2 injector, but need a custom tune to rescale your injector duty cycle.

Btw, i ...