question 20v s/t

[subzero8714]

Question:
is there a screw somewhere to adjust air/fuel ratios manually like a carburetor? if so, where is it located on the engine? and would this adjustment affect the way that the ecu would normally trim air/fuel ratios automatically?

Problem:
every time i hook up the o2 sensor, my air/fuel gauge reads extremely rich, under all driving conditions, and the car backfiring and stuttering as though starving for gas, when i step on the throttle hard then it pulls off good until i need to stop and move off again. without o2 sensor connected car driving good but burning alot of gas. what you guys think????????

[MaelstroM]

sounds like your O2 sensor is bad
have you checked it?

[subzero8714]

sounds like your O2 sensor is bad
have you checked it?

its a used sensor, heater working, but i dont wanna test the signal side cuz i've read that a multi meter can damage sensors when checking signal ohms
plus i tried 2 other sensors and it was the same thing

[Metallicork]

There is no air screw. Usally the a/f ratio is mapped from your afm and tps to the ecu.

[trdboy]

There is no air screw. Usally the a/f ratio is mapped from your afm and tps to the ecu.

actually there is one...if u look under the flat side of the afm u will see it but its not recommended u mess with it...the only time i used that screw for tuning was on a wideband and u have to take ur time with it.....thats why the bt 20v is so much better, m.a.p and u good to go

[josh.dookie]

steupss... d stupid man or chook up wit my one, real gas, real backfire.. Still pulling good though!