brain fart....

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Jan 8, 2002 | 10:37 PM

GlockLT4

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From: Dallas TX

brain fart....

when O2's are going out... does the car run rich or lean.. i can't remember.. :crazy:

I've got lots of rich BLM readings on the blazer and I have a feeling the O2 (s) need replacing.

[Modified by Glock'94, 8:38 PM 1/8/2002]

Jan 8, 2002 | 11:08 PM

bogus

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From: San Pedro CA

Re: brain fart.... (Glock'94)

they are like spark plugs... replace them every 30k or so...

Jan 8, 2002 | 11:09 PM

GlockLT4

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From: Dallas TX

Re: brain fart.... (bogus)

Quote:

they are like spark plugs... replace them every 30k or so...

ya.. i know.. just trying to learn here ;)

Jan 8, 2002 | 11:17 PM

bogus

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From: San Pedro CA

Re: brain fart.... (Glock'94)

ok... learning... I guess it depends on which way the voltage goes when the O2 goes bad.

From what I remember, most of the time they go rich.

Jan 8, 2002 | 11:20 PM

GlockLT4

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From: Dallas TX

Re: brain fart.... (bogus)

I just got done doing a 10 minute drive recording everything from the computer... so i've got about 400 cycles of the O2 sensor. It's doing the usual 100-900mv sin wave.

Jan 8, 2002 | 11:21 PM

Romeo Barrera

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From: Custer SD

Re: brain fart.... (bogus)

Car definately goes rich

Jan 8, 2002 | 11:40 PM

GlockLT4

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Re: brain fart.... (Romeo Barrera)

Quote:

Car definately goes rich

That's what i thought ;)... thanks.

Jan 9, 2002 | 01:28 AM

drive it

Melting Slicks

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From: Ca.

Re: brain fart.... (Glock'94)

Also while you're scanning you'll notice that it gets "lazy". The speed that it switches from rich to lean will slow down.

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Jan 9, 2002 | 01:44 AM

JonM

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From: X

Re: brain fart.... (Glock'94)

<---Brian Fart (Glock)

You will experience HORRIBLE gas mileage. The reason being, when an O2
sensor fails, it fails to rich so it doesn't burn up the engine. you
will also notice knocking at idel, also possible rough ideling.

Jan 9, 2002 | 02:13 AM

#10

C4-Wolf

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From: NYC NY

Re: brain fart.... (JonM)

Some of these symptoms sound familar. Could this cause high coolant temps?

Jan 9, 2002 | 02:39 AM

#11

GlockLT4

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From: Dallas TX

Re: brain fart.... (JonM)

Quote:

:lol: :lol:

The blazer gets about 16-18mpg.. which it's too bad for a 4.3L V6.

I'll go back through the log and see if the cycle of the O2 slows down..