O2 readings?

[JAYMBUTLER]

what should be the o2 readings be on a 87 gn. mine are real high i think. they are in the 820-850 range. i cant seem to get them any lower. any suggestions would be appreciated. i have lowered the fuel pressure to 38 lbs with the vacuum line off.

 

[TurboDave]

What scan tool are you using to read them?

 

[JAYMBUTLER]

scanmaster 2.1

 

[TurboDave]

That is pretty high then.

Type of chip, and other particulars of your setup would help.

 

[Dreamcar86]

what should be the o2 readings be on a 87 gn. mine are real high i think. they are in the 820-850 range. i cant seem to get them any lower. any suggestions would be appreciated. i have lowered the fuel pressure to 38 lbs with the vacuum line off.

38 lbs is kind of low depending on your chip. If you have a programmable chip I would set the FPR to 43 and take fuel out using your chip.