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- Newsgroups: rec.autos.tech
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!att-out!cbnewsj!btwomey
- From: btwomey@cbnewsj.cb.att.com (william.tw0mey)
- Subject: Excessive hydrocarbons revisited
- Organization: AT&T
- Distribution: na
- Date: Tue, 17 Nov 1992 17:11:03 GMT
- Message-ID: <1992Nov17.171103.3469@cbnewsj.cb.att.com>
- Lines: 47
-
-
- Previously I wrote:
- >Here in NJ, my car failed inspection because of excessive hydrocarbon
- >emissions.
-
- Well, I got the beastie to pass. How?
-
- I did a couple of things:
- 1. dump STP Carb cleaner into tank.
- 2. Filled halfway with with Amoco Premium ( Oxygenated fuel )
- 3. dumped another container of STP Carb cleaner into tank for good measure.
- 4. replaced O2 sensor.
- 5. got tested at another place
-
- Items 1, 2, 3 put should help with CO emissions, but this was not an
- issue. 1 and 3 might have helped, but I do not think so as I had
- burned a few containers trying to get rid of my last problem only a
- few thousand miles ago. (The carburetor mixture control solenoid
- was sticking, forcing periods of over lean and no power to be
- punctuated with bouts of normal mixture which was really over rich
- because I was flooring it to overcome the overlean condition. Fun,
- ehh?)
-
- Item 4 probably is the answer. I tested the O2 sensor before
- deciding to replace it, and got sluggish and low responses while
- enriching mixture. O2 sensor output would barely cross .5v and
- hover around .1 to .2v.. I also thought the O2 sensor had gotten
- fouled with lots of unburned fuel whilst the solenoid had been on
- the blink. Supporting this notion was the fact that I had checked
- the plugs during this episode and found them very black and
- sooted.
-
- Item 5, well, who knows. The original testers (at a garage) could
- have been buffoons. They said that the emission was probably
- caused by needing new spark plugs. Not a big ticket item for them
- to profiteer from. Going to the garage was useful because they
- pointed out a few maintenace items that I shall watch.
-
- Thanks to those who responded:
- Bohdan.L.Bodnar@att.com
- rossi@gvlf9.GVL.Unisys.COM
- mf@dancer.cc.bellcore.com
- danapple@vicor.com
-
- Bill Twomey
- --
- bt@violin.att.com
-