gencollon2

Hey Rennlist
I must once again ask for some technical support with my '88 turbo
I failed smog at 15MPH in California.

Does anyone have info on the California specific jumper pin for the DME?

Is it just a short that I can make with a couple appropriately sized pin and socket connectors and a wire?

Or is there a circuit board or other electronics involved? If so, where can I find one?

Also what settings should I try on the fuel quality switch? It looks like I failed on HC and NO. Does this indicate that my issue is with the cat and not a lean/rich mixture?

Last question: I have read a couple of posts saying race gas helped people pass smog, why would that be?

V2Rocket

Sure looks like a cat to me.
Have you messed with fueling at all?

gencollon2

I have not messed with the FQS yet. Haven't even looked behind the carpet and found out what position it's currently in. I still have a stock fueling system as well.

FRporscheman

%o2 should be near zero at all times - looks like at 15mph you're running lean. That's one thing to fix.

I've been thru (read: failed) CA smog so many times, it usually means the catalytic converter is dying/dead. But I have gotten it to barely pass by doing all the other emissions-improving repairs aside from the cat. This would be:

Air filter
Clean oil
Fuel filter
High quality fuel (no not ARCO)
Plugs
Cap&rotor
O2 sensor

And you can check proper function of:
O2 sensor
Temp sensor
TPS
AFM (and AFM's CO adjustment)
Fuel pressure

A web search will get you lots of answers on what causes high or low co/no/hc/o2 and also that a bad cat can cause all of it. However, a new cat will just cover up all those problems and you might not realize that the engine isn't running right. I say you should at least test and confirm the important components first.

Also, check (and replace ) the plugs, it always helps to know how the combustion chambers were doing.