srt4 running rich with dsp ?

[28patrick28]

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. Fuel pressure at 60 psi. well all look nice. i check everywhere on the car lol. i have hesitation sometime. look random.

I should be near lean with stock injector at those boost level, Im Lost....

When is a colder day, afr are better. Less hesitation.

[mikel]

Is this with a wideband?

[gizmodo]

How do you know what fuel pressure you are running at? Stock the SRT-4 runs 58.

[28patrick28]

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, fuel pump, o2 sensor. i dont think 2-3 psi more gaz would bring me rich like that .

Can the Walbro 255 lph will add to much gaz like that ???

Symtom of the car :

At takeoff, i go from 14.7 to rich 11.0 (car feel fat), after the pcm remove gaz and i go lean at 15.5-16 (Hesitation) and back to normal at 14.7 after 2-3 sec. At part driving is not so bad .

After leaving the car all a night sit, the morning is difficul to start it the first time (But only if is hot, colder day the car start right away) And my regulator holding pressure.

Wot are always damn rich and the car feel fat. (I have more power 3/4 on the pedal then full wot)

Sometime at a stop, Go lean for nothing and very close to stall.

I Dont have any check engine, and the MORE Bizzard thing, My PLug look more white (Lean) Than black... But my wideband really work... imagine.