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Preparing to do emissions re-test..long post 200

uid 39111's pic
posted by  Kenner on  Wed Jul 30 13:23 CST 2008
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last visit: Sun Aug 24 15:42 CST 2014
[RELATED]

Fail results
asm2525
limit/reading/result
1689rpm
dilution 14.7
HC 62/60/pass
CO 0.35/0.24/pass
NO 700/1073/fail

idle
rpm 807
dilution 13.0
HC 200/47/pass
CO 1.00/0.14/pass
NO na

Update on what was done and what was found.

I replaced my catalytic converter (Bosal) and O2 sensor (bosch 13913). Entire exhaust+gaskets are brand new
I found and replaced a broken vac line at my fuel regulator (completely disconnected)was rubbing on my a/c hose. new hose
I replaced a broken ground braided wire (firewall to engine). New wire.
I re-fitted the flame trap housing. It seemed to be just sitting on top rather than seated. trap was clean.
Tested and tightened all duct and hoses after AMM. nothing loose.

Before the work the OBD test coded the popular 2-3-2 "fuel system compensating for lean/rich mixture at idle".

Now I get 1-1-1 Ok Before and after long test drive.

Thoughts, opinions.
My guess
The vac line should help HC
The O2 should help HC and CO
The cat should help my failed Nox.

I am actually optimistic

Do I have to reset the ECU? Details please.
--
91 240, 98 S90






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