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Well I spoke too soon. I was all set to get a new DEC or Tom's (generously offered, thanks!), but I passed again with my used OEM cat.
Here are the results from the first test, above:
Tom M suggested vacuum leaks, weak ignition parts, or bad O2 sensor in that order. It turned out there were some vacuum leaks, and I had the spark plugs and ignition wires replaced. Here are the results of the final test:
good numbers, but i think next time around you might need to get a cat.
You would think, and I expect so as well. However the last three tests on this cat (over 6 years) have all had 15mph NOx over 650 ppm (but still passing). so it isn't really changing.
Well I just discovered some bad news. DEC is no longer stocking these catalytic converters. I couldn't find one from any of the normal Amazon/Ebay sellers, so called DEC directly this morning. They said they can still make one "upon request" but the list price --are you sitting down-- is $3,495. He quickly added that the street price would be closer to $1,000 if I could find an existing vendor to order one for me, but I have no idea how I'd get a existing vendor to order one, or how long it would take, and I can't help but think the "upon request" pricing is a polite was of saying "please don't request."
Mulling options now, but am inclined to get a CARB legal universal cat and weld it into one of my old DEC pipes... Anyone know of any other CARB-legal direct fit cats like the DEC?
Here in Texas, after the 25th year of manufacture, it is safety inspection only. No more smog test. General highway speeds of 75 with 80 and 85 MPH in certain areas.
Living in rural Oregon now, just outside Medford.
No *&^%! ing smog.
Medford proper has only OBDII smog test, plug in only.
If it's a hassle to go to the smog station, you can rent the tool and do it yourself!
Gosh, I miss California....
Living in rural Oregon now, just outside Medford.
No *&^%! ing smog.
Medford proper has only OBDII smog test, plug in only.
If it's a hassle to go to the smog station, you can rent the tool and do it yourself!
Gosh, I miss California....
Recently picked up a 88 turbo thing smokes at idle at first I thought it needed a turbo rebuild. So ordered rebuild kit started taking car apart pulled intake inside of intake coked with oil so a ha I was right the turbo did need a rebuild pulled the J-boot off the front of turbo n the impeller wheel is coated in oil got me thinking it's not the turbo it's the AOS, After doing some research I found the porsche changed the AOS plumbing in the 89 n newer cars they added a AIR CONTROL VALVE to the AOS p/n 94410732400 and a different hose to the top of the AOS tube my plan is to retro fit the air control valve to my 88 clean n flush the whole intake track from the turbo to the valves also rebuild the turbo since A. I bought the kit n B. I snapped to bolts off the hotside so the turbo has to come out lol. N hope the Cat hasn't been killed but all that oil going through it.
and going fwd just before I smog it pull the intake n clean any oil residue out as close going to get the smog check as possible
Recently picked up a 88 turbo thing smokes at idle at first I thought it needed a turbo rebuild. So ordered rebuild kit started taking car apart pulled intake inside of intake coked with oil so a ha I was right the turbo did need a rebuild pulled the J-boot off the front of turbo n the impeller wheel is coated in oil got me thinking it's not the turbo it's the AOS, After doing some research I found the porsche changed the AOS plumbing in the 89 n newer cars they added a AIR CONTROL VALVE to the AOS p/n 94410732400 and a different hose to the top of the AOS tube my plan is to retro fit the air control valve to my 88 clean n flush the whole intake track from the turbo to the valves also rebuild the turbo since A. I bought the kit n B. I snapped to bolts off the hotside so the turbo has to come out lol. N hope the Cat hasn't been killed but all that oil going through it.
and going fwd just before I smog it pull the intake n clean any oil residue out as close going to get the smog check as possible
Can one retrofit the air control value to an 87 turbo. If so, do you happen to know if one need to buy an different AOS hose in addition to the valve? Thanks
01-12-2019, 04:16 PM
DEC is no longer stocking these catalytic converters. I couldn't find one from any of the normal Amazon/Ebay sellers, so called DEC directly this morning. They said they can still make one "upon request" but the list price --are you sitting down-- is $3,495. He quickly added that the street price would be closer to $1,000 if I could find an existing vendor to order one for me, but I have no idea how I'd get a existing vendor to order one, or how long it would take, and I can't help but think the "upon request" pricing is a polite was of saying "please don't request." 
