Running Lean -----post from exhaust forum

[Realest]

Okay. I changed out the injectors i bought and installed the original ones i took off the engine when I stole the engine from my donar car. No change.
I disconnected the BARO solenoid, connected my vacuum line straight to the Map sensor.....cleared the codes and went for a spine. Running like shit now, but No new codes were tripped? Bad Baro solenoid??? Different problem all together?

Back to the lean problem.
- A/F gauge is grounded to the battery, but i also have the boost gauge lighting ground soldered at the gauge pod. So they both go to the battery. I don't think that would cause a bad reading.
-Fuel Pressure is 50psi at idle
-Turbo pump is Installed
-Fuel Filter is new
-O2 sensor is new
-A/F gauge purple signal wire is soldered just before the O2 sensor connector, on the wiring harness side. Soldered to the black wire, wire B. Middle Wire.

Where do i go next? Get a multimeter an see if i have some wiring problems i guess, or hook the scanner up at work.
Thanks for all the input guys.

edit
further more, I did a test with carb cleaner. The gauge should have went rich for sure, but it didn't. So it's either the negative being combined with the negative for the boost gauge lighting. Or My A/F gauge is just broken.

[unclejemima]

is the guage lighting up at all? Even one or two ticks?

[Realest]

two..sometimes three red. I am going to get a scanner on the car to check the operation of the O2 sensor, my new one could be bad.

[_9_]

yeah I would deffinately check the o2 feedback with a scanner or even better with a 5-gas machine. If you do actually have a lean condition, you'll see it on the scanner with pulse width and your fuel trim. Also I wouldnt disconnect your baro, It needs to see what atomspheric pressure is to adjust your fuel accordingly.

edit: just read your edit, what wire o2 sensor do you have? 3,4?

[unclejemima]

what year car?

50psi with vac line hooked up or unhooked?
-mark

[_9_]

Also if you could, hook up an oscilliscope to your o2 and look at the waveform. it should cycle between 900mV (rich) to around 100mV (lean) within 200-500mS.

-Courtney