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- From: pshyvers@pyrnova.mis.pyramid.com (Peter Shyvers)
- Newsgroups: rec.autos.tech
- Subject: Re: oxygen sensor
- Message-ID: <183844@pyramid.pyramid.com>
- Date: 10 Oct 92 21:56:03 GMT
- Sender: daemon@pyramid.pyramid.com
- Reply-To: pshyvers@pyrnova.pyramid.com (Peter Shyvers)
- Organization: Pyramid Technology Corp., Mountain View, CA
- Lines: 38
-
- In article <1992Oct6.141703.21791@porthos.cc.bellcore.com> dje@sword.bellcore.com (Don Eilenberger) writes:
- >In article <1aqrk1INNads@usenet.INS.CWRU.Edu>, aa650@cleveland.Freenet.Edu (Marc Snitzer) writes:
- >|>
- >|> I have a Toyota '86 Van with fuel injection. The maintenance
- >|> schedule says to replace the oxygen sensor at 60K miles. I now
- >|> have over 70K and it's still running fine on the orig sensor.
- >|> Any comments on if it should be replaced? There "eng" light has
- >
- >Mark... the typical failure mode of Ox sensors is a slow degradation
- >in it's response time to changing Ox concentrations... typical
- >symptoms:
- >
- > 1. Engine surging while at speed (mixture being richened, and
- > then leaned).
- > 2. Poor fuel milage (computer tends to err on the rich side
- > when sensors start to go).
- > 3. Poor quality idle - sometimes - sensor indicates lean mixture
- > and computer richen's it up...
- >
- <excellent discussion of mechanics of the sensor)
-
- I'll vouch for fix-it-even-if-not-broken. We have a 1987 Celebrity Wagon with
- the 2.5L 4-cyl. - a bit undergunned for the 8 seats provided, but when the
- engine is running well, it's great!
-
- I posted a few weeks ago with some of the above symptoms, plus more: the thing
- would absolutely bog down when you accelerated under any kind of load. It
- would almost fail to idle, esp. if you threw in the A/C - and this was a car
- that *charmed* me when I bought it (used) 'cause it was a real smooth idle
- in spite of the 4-cyl. It'd spew loads of black smoke almost every time you
- jumped on it - a rare thing in the days of converter-equipped cars...
-
- It was the damned O2 sensor. The GM dealer swapped it in an hour, and the car
- has been a champ since. Oh, yes - 72K miles on it, assuming it wasn't replaced
- in the 19K miles before I had it. Like replacing points in 1960's cars: cheap
- insurance.
-
- pete
-