Hi James thanks for the advice, I'll probably do the tune up thing and something else too. Another answer came directly to my inbox from (Tom Chudzinskion) possibly a regular contributor from our newsgroup that read: catyltic convertors begin aging instantly and collect sulfur deposits which will increase the e-test readings, and he also suggested that I consider the period in which to replace 02 sensor. here it is as received by me:
" It's not unusual at all to see the HC, CO, and NOx look excellent with a new catalytic converter but then see the readings rise as the catalytic converter ages. It's normal. If you live in an area where there is substantial amounts of sulfur in your gasoline, the sulfur will reduce its efficiency as it collects on the substrate."
"You didn't mention changing your O2 sensor. Bad or aging O2 sensors are the most common reason for emissions control failures and for high readings."
"I can't understand if you own a Volvo from your post or if you are referencing a different car with the readings you posted. In any event O2 sensors from the 1980's are 30,000 to 60,000 mile maintenance items and should be replaced at the interval recommended in your owners manual. Not replacing them will eventually prematurely burn out your catalytic converter(s) which are usually much more expensive."
Tom Chudzinski I am greatfull to all who have written me and the group as I am proud of this newsgroup and the people here are great.
Sincerely,
Dan Harrington Mississauga, Ontario Canada
88 245 DL 230,000klms 87 244DL 190,120klms hoping that rust doesn't eat away at the frame and underbody cause I think with some frequent TLC I could keep these two Bricks going, going, and going again!