Posted to Emissions Forum on 10/17/2012
Re: Help me help my old man neighbor with a '79 T-bird
I agree with Robert and Olle.
I've seen it dozens of times; the EGR flows too much for
whatever reason, and drops manifold vacuum far enough to
cause power enrichment.
CO and NOx are typically caught in a see-saw battle on those
old vehicles. You just need to find a way to find a happy
medium, and I would start with a properly calibrated EGR
Quick Stop Smog & More
Sacramento, California, USA