Tuning help!!! Need lotsa help pls!!

[T-Type Mike]

Guys, I am hoping to go to the track this weekend. I have been doing a bit of tuning on the car, using a snap-on scanner, and have some data. I think I need some help as to where to start.

Here are my readings at Idle and ranges

BLM is pegged at 150
TPS .43
IAC possition 54-61
INT- 134-149
MAF- 5
O2 XCOUNTS - ANYWHERE FROM 2-23??????
LV8- 28
RPM- fluctuates between 975-1025
The car is in closed loop

During my road test (65 mph) my readings were...

o2- 816
iac possition-101
tps- 2.78
lv8- 221
maf-184 gps
o2 x counts-3
Noticed A/F reading was not learned??????

2nd run at 3727 rpm
o2- 924
int- 128
tps -2.08
blm -150
iac possition_ 101
Lv8- 179
maf- 153
O2 Xcounts- 4
MAT- 30 celcius


THe car reads that it is rich, which is good. 44lbs FP line off using LUbrant 94 oct. 16 lbs boost with no knock. During my last blast around the block, which I was unable to record, I noticed that my LV8 went all the way up to 230. I also noticed the scanner read that I had 34 degrees of spark advance, Now guys where do I begin?? I know you guys are the guru's!! ANy help would be appreciated. Thanks, Mike

 

[T-Type Mike]

I have started to tear my headers/ crossover off today to see if I can trace down any exhaust leaks there...

Would anyone like to help me out here as to what else I should address??? Thanks in advance, Mike

 

[xxninja]

well id ont have time but i can give some input on your idle values
and try to gett to the other values


TPS looks good (should be between .40 - .46)
MAf looks good (should be beweetn 5-7)

O2 counts dont matter at idle ( due to closed loop)

Your IAC values are sort of high
My car WARMED up, and in gear with my foot on the brake are generally between 20-30)
adjust this , with the screw on the side of the throttle body
** do a search for "adjust IAc values"

**turning 1 way brings the values up, and turning the other way, brings them down

**remember to restart the car after every IAC adjustment

**adjusting the IAC also change the values of your TPS
make sure to check your tps values after each adjustment to the IAC
kind of a back and forth process
"adjusting TPS" is probli a good search , for info

** your idle is sort of high as well, im sure this will be fixed when you get your Tps and IAC set propely

My car idles at 750-800 rpms ...... tops


BLM values are supposibly perfect at 128
this is pretty hard task to get, but if you can get close your good to go

** BLM values over 128, Meaning the Car is lean and adding fuel to the mix

** BLM values under 128 , MEan the Car is overly rich, and the Ecm is taking fuel away from the mix

I notced yours are high, meaning your car is lean,
which is sort of odd for being at Idle

** do a search of "high blms"
or somethign similar to that , to give you some ideas on what could be causing this, because i see you have a new fuel pump and Fp at 44



im sure sum1 else will chime in and add some input, later on today
but i need to go to work now

 

[turbot2112]

as for your high blms, id check for a vacuume leak.

 

[T-Type Mike]

Thanks very much guys, I just need a bit of direction here! Rookie tuner here! I will continue checking vacuum leaks and header cracks later today, I may have found one at the EGR. Thanks again, Mike