02 sensor bank 1 not switching rough idle, help im new to diagnostics.

[usafws6]

Attachment 31004

Attachment 31005

im stumped as to why my o2 isnt switching and why my idle is so rough. this is a stock internal ls1 transplanted into a 72 nova. any help would be great.

car has long tubes and brand new 02s
headers are the only performance mod.

emissions have been deleted also.

[98hc4mula]

check all grounds...ensure there is a signal to the power wire on the harness where the O2 connect. look at the PCM connectors for moisture etc...start with the basics.

[usafws6]

how do i check the 02 wiring with a multimeter. and which wires can i test. the pcm connections are tight and moisture free.

[aknovaman]

Clean the injectors or soak in kerosene.

[usafws6]

ok ill clean the injectors and see if that helps

[aknovaman]

Happened three times to me on engines that have not been run in six months to three years.

Retired after 23 yrs in USAF too.

[usafws6]

lol youve got 20 years on my time in service, did you retire as a master or senior? or were you an officer?

[usafws6]

ok i cleaned the injectors and it didnt help at all. i pulled the driver bank and the plugs look brand new while the passenger side looks like it was dipped in liquid charcol i really want to figure this out so i can drive my car!!!!!!

[Ben Charles]

Your bank 1 is measuring VERY lean with a 50% STFT's, looks like bank 2 is switching but its lean as well with 30% STFT's. Id look for a vac leak on bank 1. Did you use extension harness for the o2's or did you cut them?

[edcmat-l1]

It looks like one side is getting no fuel at all. Go out and spend a few bucks on a mechanics stethoscope. You will find it very useful for years to come. Take the stethoscope, and check for audible clicking from the injectors on that bank. If you hear no clicking, check for 12 volts to the injectors with a test light. If no 12 volts, check your fuses. If you have 12 volts, go rent a noid light set from Autozone or Advanced, and check for injector pulse using the noid light. Report back with what you find.

BTW, the reason I say it looks like no fuel getting to the one side, is because the O2 sensor is pegged lean, although not low enough in voltage to blame it on a short to ground. The fuel trims are +50%, and you stated the plugs look brand new. If it was getting fuel, and there was an O2 issue (reporting incorrect info) then the plugs should have some color, if not being black.