Scanmaster readings (iac 0??)

[sugarandopium]

This is what I was getting at idle....
o2 - 450-550
AF - 05
L8 - 33
bAt - 14.2
Int - 140
bL - 142
CLt - 162
AtS - 52
r - 900
tPS - .48
IAC - 0
cc - 28-214
MAL - 0

How do these numbers look?

Car runs really well, and getting 0 knock at 15psi
idle seems a bit low at times is the only thing that dosen't seem right...
iac seems to read 0 alot, gave it some gas in park the numbers went up a little.
does the iac need to be replaced? thinking about preventive maintenance before i mod anything...
does everything else look okay?

 

[Junior Samples]

This is what I was getting at idle....
o2 - 450-550
AF - 05
L8 - 33
bAt - 14.2
Int - 140
bL - 142
CLt - 162
AtS - 52
r - 900
tPS - .48
IAC - 0
cc - 28-214
MAL - 0

How do these numbers look?

They look like crap

Tps is in enrichment..should be 40 to 42@ idle
everytime you adjust iac, you must go and adjust tps
start iac with maybe 2 threads showing, go and set tps to .40 to .42

your int and blm are out of bounds at 140 etc..adding fuel like mad to comp for lean condition...your tune is all messed up

 

[sugarandopium]

k, got the tps down to 42
set the iac down to 2 threads, still reading 0
int is down to 128, blm is still at 142

going to try and adjust the iac more.
is there anything else i should be doing?

 

[jasjamz]

I would have just backed the IAC screw out until the tps came down to .42-.44. then, see if the IAC was in between 10-30 counts. Made sure you had no vacuum leaks and post the Scanmaster readings again.

 

[sugarandopium]

With adjustment:
o2 500-700
AF 04
Int 128
bL 142
CLt 167
AtS 93
r 775
tPS .42
IAC 14

 

[turbojd]

Did you adjust the IAC properly

Tuning

 

[Junior Samples]

reset your ecm... plug comming off pos on battery

go drive for awhile and let ecm relearn your long term then repost

 

[sugarandopium]

Did you adjust the IAC properly

Tuning

Yeah thats what i was following to adjust it...
i see it's a few counts low now.. should have wrote it down....
ill bring that up some now...

 

[sugarandopium]

reset your ecm... plug comming off pos on battery

go drive for awhile and let ecm relearn your long term then repost

will do that next then

 

[jasjamz]

Just curious what is your fuel pressue with the line off and plugged? With the line on? Seems better. int at 128 but blm at still on the high side. O2s bounicng between .500 and .700? ever been replaced, have you been using leaded fuel with that sensor. Just trying to get more info for others who may be able to spot something.

 

[sugarandopium]

Just curious what is your fuel pressue with the line off and plugged? With the line on? Seems better. int at 128 but blm at still on the high side. O2s bounicng between .500 and .700? ever been replaced, have you been using leaded fuel with that sensor. Just trying to get more info for others who may be able to spot something.

Thanks for all help, bear with me, still trying to learn these cars.

I don't have a fuel pressure gauge yet, car has no gauges, going by the dash boost gauge which still seems to work.
As far as I know, everything is stock aside from plugs/wires, TT chip, and catback exhaust (car has no cat).
Don't know if the o2 has been replaced, my guess is no.
Highly doubt anything but unleaded 93 was ever in this car.

adjusted them a bit more, reset ecm, drove about a mile, this is reading idling after a short drive:
o2 - still bouncing 500-700
AF - 04
L8 - 30
int - 128
bl - 142
clt - 176
ats - 96
r - 750
tps - .40
iac - 17


Are there any writeups to help me better understand int and bl readings?

 

[jasjamz]

http://www.turbobuick.com/forums/how-tos/278346-better-understand-your-blm-int.html#post2122101