OKay just got my wideband in...and its running rich biiig time! Well I get around 250 KM per tank (55-60ish liters)


Okay Temp outside is 61*F today
Car temp was at 180ish
Car timed for N2O

IDLE...14.7:1ish
1500ish-1800 14.7-15.2:1

WOT...drops down to 10.1 then climbs to about 10.9:1 but then after I get off it is leans out to max on the gauge and wont read and the exhuast pops

How can i lean this sucker out a bit??

Jay

Anyways the chart i have in tuner cat (if this is the right one reads

Closed TPS spark advance

RPM Spark Degree
0 0.0
400 28.0
800 28.0
1200 30.0
1600 34.0
2000 34.0
2400 34.0
2800 35.0
3200 37.0
3600 37.0
4000 37.0
4400 37.0
4800 37.0

Mods....
355 LT1
speed pro pistons
Ported intake and heads
1.6 RRs
hooker 1 5/8 headers
3 inch all the way back
NO CATS
52MM BBK
hotcam
30#
aeromotive adjustable FPR
K&N
3000 Stall
Built 4L60e
MOSER 12 bolt 3.73s

 

Check the fuel pressure.

Exactly where did you locate the wideband sensor?

Appears the PCM is able to pull enough fuel out in closed loop to maintain the correct A/F ratio. But, can't pull the fuel out at WOT. Your PE tables may be off, or perhaps your fuel pressure is higher than it is supposed to be.

Why would the tune be "timed for N2O"? Not that its affecting your "rich" problem, but why not optimize the tune for running NA, then use an external box to pull timing for the nitrous? Why give away performance while not running the nitrous.

 

Fuel pressure is at about 41ish at idle...And the tune I never got around to changing bc when i got the software it started to get cold outside.

The sensor for the wideband is right when the Y pipe intersects the two. On a 3rd gen car it is pretty much right at the front right tire.

Jay