SC CIS 02 Test port

[j911brick]

I did a search and couldn't find information on where the SC 02 sensor test port is. Found the spec for testing, but no help if I can't find the test port. Factory manuals are no help. I have an '80 sc and the 02 system appears to not be working. Also: how do you test temp sensor? Also: not getting a clicking from relay.

[911Freak]

I believe it is located on the left side of engine compartment, it is a round socket mounted in the metal panel next to the rear fuse/relay panel. If I had an engine compartment pic I would outline it for you

[j911brick]

Originally Posted by 911Freak

I believe it is located on the left side of engine compartment, it is a round socket mounted in the metal panel next to the rear fuse/relay panel. If I had an engine compartment pic I would outline it for you

OK, I found a plug with cap, and three (badly corroded) terminals. Is that it? WHich terminals do I test with?

[tirwin]

Can you describe what got you started on this to begin with? Maybe more details on your symptoms?

Reason I ask is that it is not unusual for people to disable the O2 sensor anyway. It just causes it to run in open-loop mode. Do you need to pass emissions? Otherwise, why bother? Not questioning... just curious. Mine is disconnected on my '83 SC.

[j911brick]

Originally Posted by tirwin

Can you describe what got you started on this to begin with? Maybe more details on your symptoms?

Reason I ask is that it is not unusual for people to disable the O2 sensor anyway. It just causes it to run in open-loop mode. Do you need to pass emissions? Otherwise, why bother? Not questioning... just curious. Mine is disconnected on my '83 SC.

Customer brought the car in with high/hunting idle. Both those are fixed, AFR and timing set per spec, but car does not accelerate like it should.

Found info on dwell test. Duty cycle is 0.3%.

[j911brick]

Went back and tested the relay. The relay is bad.

[j911brick]

Since the 02 sensor wasn't working the car still ran like crap to spite the fact everything was tuned to perfection. So just for fun I decided to put in an early SC distributor. Now it runs like a scalded ape!

[911Freak]

early SC? the one with only 1 vacuum line on the dizzy pot?

[j911brick]

Originally Posted by 911Freak

early SC? the one with only 1 vacuum line on the dizzy pot?

yep. Use the blue hose, plug the red hose.

[boyt911sc]

Originally Posted by j911brick

Customer brought the car in with high/hunting idle. Both those are fixed, AFR and timing set per spec, but car does not accelerate like it should.

Found info on dwell test. Duty cycle is 0.3%.

j911brick,

Do you operate an auto repair shop?

Tony

[j911brick]

Originally Posted by boyt911sc

j911brick,

Do you operate an auto repair shop?

Tony

Yes, part time.