Dual O2???

khoopes · 12-22-2008, 10:38 PM

Hi Folks, I am desperately trying to get my truck running to leave town. I am doing a Turbo engine swap in my 88 truck. The engine is out of an 87 turbo truck. I found out my truck had a dual oxygen sensor system and I am wondering what to do with the second O2 sensor now. Can the turbo computer even take a feed from the second sensor? I will have to do some fancy cutting and welding on the exhaust pipe to take the mounting plate area of the old exhaust pipe and splice it into the new pipe that does not have a place for the second sensor. Can I just unplug the second sensor and run without it?

Any help appreciated.

Kris

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abecedarian · 12-22-2008, 10:44 PM

If the turbo truck didn't have the 2nd O2, I wouldn't worry about it. The 2nd O2 is basically to check on the catalytic converter operation. But, you may have some issues if you have to smog test it.

scuba · 12-22-2008, 10:44 PM

Edit, Read that wrong...

khoopes · 12-23-2008, 10:18 AM

OK I found out it is not a second O2 it is the primary but it is in the tailpipe in front of the converter instead of in the manifold. It has a totally different plug though I will have to see if I can rewire the harness I guess.

abecedarian · 12-23-2008, 10:22 AM

why not use the manifold from the turbo and keep the O2 up there and just leave the other O2 in the pipe to block the hole?
You are switching harnesses from the turbo onto the 88, right?

12-22-2008, 10:44 PM	#2 (permalink)
abecedarian Registered User Join Date: Mar 2008 Location: Somewhere 'round Nashville, TN. Posts: 9,879	If the turbo truck didn't have the 2nd O2, I wouldn't worry about it. The 2nd O2 is basically to check on the catalytic converter operation. But, you may have some issues if you have to smog test it. __________________ Insomnia: it's a way of life. Ever notice "tupac" spelled backwards is "caput"? Meet me on Zune.

12-22-2008, 10:44 PM	#3 (permalink)
scuba Registered User Join Date: Jan 2008 Location: Temporarily relocated to SATX Posts: 6,278	Edit, Read that wrong... __________________ GO DJ; Im the resident forum smartass, Get over it and use the search button Thumper 99 Taco 2.7 LockRight in the a$$ Armor: 4Xinnovation Sliders, Full BudBuilts on the Way. FR Susp: OME 881's + N91S RR Susp: Allpro 3" Springs, U bolt flip kit, Bilstein 5150's Sittin Sideways on 33X10.5 BFG MT Km1's Pics Or It Didnt Happen Crew Scuble Pacific Crawlers UltimateYota TTORA

12-23-2008, 10:18 AM	#4 (permalink)
khoopes Contributing Member Join Date: Apr 2006 Location: Oklahoma, USA Posts: 298	OK I found out it is not a second O2 it is the primary but it is in the tailpipe in front of the converter instead of in the manifold. It has a totally different plug though I will have to see if I can rewire the harness I guess. __________________ Kristopher Erik "KD5EJO" Transplanted Alaskan in Foster OK 88 X-Cab now with 22RTE/CT-20, 87 T4Runner stock 22RTE/CT-20, 93 FZJ80 Landcruiser w/e-lockers FOR TOP NOTCH CARBURATOR OVERHAULS CLICK HERE http://www.yotatech.com/f37/ekhi-cus...turing-162085/ Like Fishing, hunting, Ham radio, flying, canoeing, kayaking, traveling, all the better with friends. Dedicated Christian. Excellent Wife. 3 Very Good Sons. Any other questions?

12-23-2008, 10:22 AM	#5 (permalink)
abecedarian Registered User Join Date: Mar 2008 Location: Somewhere 'round Nashville, TN. Posts: 9,879	why not use the manifold from the turbo and keep the O2 up there and just leave the other O2 in the pipe to block the hole? You are switching harnesses from the turbo onto the 88, right? __________________ Insomnia: it's a way of life. Ever notice "tupac" spelled backwards is "caput"? Meet me on Zune.

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