1985-1998 [Subscribe to Daily Digest] |
Members do not see ads below this line. - Help Keep This Site Online - Signup
Hi Again,
Well today I got the feared verdict and my -88 9000 Turbo failed the California Bayarea Dynamic (severe) smog test (the NO values at 15mph).
Any of you out there with experience in diagnosing reasons for failed smog test? Below I have listed the testresults for the interested...
I replaced O2 sensor maybe a year or two ago (max 10-20K miles), so I think it is OK. A couple of months ago I installed new plug wires, and cleaned-only plugs, rotor - cap since they had been replaced about a year ago. A leaky flex pipe on exhaust (betw header / cat) was alos replaced a year ago. Ignition timing set to 15 BTDC (16 +/-1 allowed).
I am listing all these since I am trying to eliminate some areas in the diagnosis process.
The Test only smog guy said that probable areas would be Temperature / Pressure and he hinted to "EGR system or Cat converter".
The Cat could be a possiblity of course since I have never replaced it in 6 years of owning the car (bought it at 124K Miles), not sure about earlier - no documented history from prior owners.
So here is the result, let me know if you have any ideas pls:
Test rpm Co2% %O2 HC(ppm) CO% NO(ppm)
max meas max meas max meas
15 mph 1861 15.0 0.2 114 60 0.73 0.28 785 1075 FAIL
25 mph 2166 15.0 0.1 88 48 0.61 0.29 724 717 PASS
Thanks
-88 9000 Turbo
180K miles
SPG9 APC1
3.0 Fuelreg
2 1/2" exhaust
Suspension package
posted by 68.127.13...
No Site Registration is Required to Post - Site Membership is optional (Member Features List), but helps to keep the site online
for all Saabers. If the site helps you, please consider helping the site by becoming a member.
 |
 |
 |
 |
 |
