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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: Unofficial on May 12, 2008, 08:59:28 pm

Title: O2 Sensor?
Post by: Unofficial on May 12, 2008, 08:59:28 pm

When I pulled my manifolds off to put headers on my '87 R10, I had the pull off the O2 sensor. I didn't think I would have one, but I guess I did. (I guess it does make sense seeing as though I have TBI).
I never got a new one for my headers, but I can't really tell if I even need it or not. My exhaust smells pretty bad, so I guess it's possible that I'm burning too rich/lean without the sensor. I might be burning oil though.

What do you guys think? I've been driving it for about a week without the O2 sensor with no problems.

Title: Re: O2 Sensor?
Post by: VileZambonie on May 12, 2008, 10:48:15 pm

It is going to run rich and will never go into closed loop without the O2 sensor. You need to install an O2 sensor bung in the collector and reconnect it.

http://store.summitracing.com/partdetail.asp?autofilter=1&part=NGK-91301&N=700+115&autoview=sku

Title: Re: O2 Sensor?
Post by: blast on May 13, 2008, 10:14:26 am

02 sensor went out on my 90 c1500, mileage went from 18mpg to maybe 10mpg.  Black smoke and soot was practically oozing out the tailpipes.  Put a new one in, and back to 18mpg and no black smoke or soot.

Title: Re: O2 Sensor?
Post by: Unofficial on May 13, 2008, 11:41:45 am

Quote from: blast on May 13, 2008, 10:14:26 am

02 sensor went out on my 90 c1500, mileage went from 18mpg to maybe 10mpg.  Black smoke and soot was practically oozing out the tailpipes.  Put a new one in, and back to 18mpg and no black smoke or soot.

Dang! I think I even noticed that my gas was going faster than usual...

Thanks for the advice/info.