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#1 |
Senior Member
Join Date: Sep 2004
Location: Georgia
Posts: 614
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Oxygen Sensor on '85 Chevy???
I was under my truck today looking for it and couldn't find one. It appears there never was one either, as I couldn't find a connector anywhere in the exhaust pipe. Did the '85's have the oxygen sensor? I don't think I have a computer in my truck either, just that thing that advances the timing (that has been disconnected and bypassed. In fact, the only emissions equipment I can find are the air pump with only one fitting to the exhaust manifold on each side and the EGR valve. Was there anything else on this year model?
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![]() 2012 Silverado LT 1500, 5.3, 6 speed auto '86 SWB C-10 Silverado |
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#2 |
Senior Member
Join Date: Jul 2003
Location: Indianapolis, IN
Posts: 1,277
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Re: Oxygen Sensor on '85 Chevy???
You wont have an oxygen sensor unless you have tbi. You might also have a vacuum swith on the thermostat neck, possibly a computer controlled carb, pcv valve, thermostatic valve in the air cleaner inlet, and a vent between the air cleaner and valve cover.
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#3 | |
Senior Member
Join Date: Sep 2004
Location: Georgia
Posts: 614
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Re: Oxygen Sensor on '85 Chevy???
Quote:
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![]() 2012 Silverado LT 1500, 5.3, 6 speed auto '86 SWB C-10 Silverado |
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#4 |
Registered User
Join Date: Nov 2005
Location: WV
Posts: 227
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Re: Oxygen Sensor on '85 Chevy???
My 85 no computer(of corse it was originally a diesel)
Shane
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1993 K1500 350 5 speed ![]() 1985 K10 Silverado Vortec 406 5 speed (in body shop) "I been drivin' this '85 pickup truck Them buddies of mine call it a bucket of rust She's a little beat up but she still runs like the wind Yeah, kinda like me I been banged and bruisedBeen around the block a time or two But I'm runnin' like new goin' places I never been No, I ain't broke I'm just broken in" 1963 Dodge Townwagon(its amazng what 30 years and zero miles will do to a vehicle ![]() Member#20327 |
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#5 |
BAD BOW-Silverado XST
Join Date: May 2000
Location: Senior Member from Austin, TX
Posts: 6,431
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Re: Oxygen Sensor on '85 Chevy???
California models had oxygen sensors way back to at least 83 with a carb. My factory manual shows wiring for it.
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#6 |
Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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Re: Oxygen Sensor on '85 Chevy???
I don't know about the CA models, but the others did not have a computer controlled carb. The wires that go to the carb control the dual capacity acelerator pump. AFAIK, it is activated by a temp switch on the thermostat housing.
Slonaker |
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#7 | |
Senior Member
Join Date: Sep 2004
Location: Georgia
Posts: 614
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Re: Oxygen Sensor on '85 Chevy???
Quote:
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![]() 2012 Silverado LT 1500, 5.3, 6 speed auto '86 SWB C-10 Silverado |
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#8 |
Senior Member
Join Date: Sep 2004
Location: Georgia
Posts: 614
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Re: Oxygen Sensor on '85 Chevy???
All of this is really leading me to my next question. I know that the catalytic converter is clogged up on my truck. Since we don't have the smog inspections where I live in GA, is there any good reason why I shouldn't just yank the air pump out, and run headers with dual exhaust? I'm sure it would be beneficial to my gas mileage.
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![]() 2012 Silverado LT 1500, 5.3, 6 speed auto '86 SWB C-10 Silverado |
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#9 |
Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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Re: Oxygen Sensor on '85 Chevy???
No reason why you shouldn't...
![]() Slonaker |
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#10 |
Senior Member
Join Date: Jul 2003
Location: Indianapolis, IN
Posts: 1,277
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Re: Oxygen Sensor on '85 Chevy???
The only problem might be finding a muffler shop to do the work. We don't have smog in Indy and some shops still wont touch a truck that has headers. I got a quote a few weeks back for my 86. The shop wanted $500 for duals from the headers back with mufflers and cats.
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#11 |
Registered User
Join Date: Aug 2005
Location: missouri
Posts: 136
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Re: Oxygen Sensor on '85 Chevy???
do you have a vehicle inspection at all?
if so you might want to check what all is checked on the vehicle before taking a bunch of stuff off. |
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#12 | |
Senior Member
Join Date: Sep 2004
Location: Georgia
Posts: 614
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Re: Oxygen Sensor on '85 Chevy???
Quote:
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![]() 2012 Silverado LT 1500, 5.3, 6 speed auto '86 SWB C-10 Silverado |
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#13 |
Insert Witty Text Here
Join Date: Oct 2002
Location: San Antonio, TX
Posts: 3,415
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Re: Oxygen Sensor on '85 Chevy???
Save anything you take off. You never know when smog inspections will be brought in.
Slonaker |
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#14 |
Registered User
Join Date: Oct 2002
Location: Edmond, OK
Posts: 5,906
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Re: Oxygen Sensor on '85 Chevy???
the only computer it might have is for the ESC (electronic spark control).. there is an article on www.73-87.com that shows how to remove it.
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Jon 1982 Chevy Silverado 350/th350.... RETIRED 1993 Jeep XJ 2 door(Cherokee) 4wd 4.0ltr/AX-15 (5spd)/NP231 .... Oklahoma Roll Call |
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#15 |
Registered User
Join Date: Nov 2005
Location: WV
Posts: 227
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Re: Oxygen Sensor on '85 Chevy???
AAAH WHAT GREAT WEBSITES showing how to de-electronicalize(a word in my mind
![]() Shane Edit:YEEHAW post 427
__________________
1993 K1500 350 5 speed ![]() 1985 K10 Silverado Vortec 406 5 speed (in body shop) "I been drivin' this '85 pickup truck Them buddies of mine call it a bucket of rust She's a little beat up but she still runs like the wind Yeah, kinda like me I been banged and bruisedBeen around the block a time or two But I'm runnin' like new goin' places I never been No, I ain't broke I'm just broken in" 1963 Dodge Townwagon(its amazng what 30 years and zero miles will do to a vehicle ![]() Member#20327 Last edited by Chevrolet4x4s; 04-22-2006 at 06:54 PM. |
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