One o2 to two o2 - Pirate4x4.Com : 4x4 and Off-Road Forum

Rockcrawler_101 · 01-04-2008, 12:56 AM

IM doing a 5.0 to 5.8 swap and the 5.0 had two o2 snesors and the 5.8 has just one. Is there any way to wire it up so i could use the two o2 sensors instead of having to put the one in because the way my exaust is setup it would have to be way down the exaust sytem and really hard to do.

OrangeBronc79 · 01-04-2008, 03:04 PM

Why don't you just use the 302 computer and get a custome burn. They are cheap and very effective.

Don't see the problem just running one though.

Nor Cal Wheelin · 01-04-2008, 03:16 PM

Havent seen you around in a while.

X's 2 on the 302 computer though, dont see why that wouldnt work.

Wicked_S10 · 01-04-2008, 03:42 PM

Who burns truck ECMs? Last I heard, the only ECMs with after market support were the 5.0 mustang and the post '96 OBDII truck ecms...

Later,
Jason

Rockcrawler_101 · 01-04-2008, 08:45 PM

I didnt want to do that because i want to keep the wiring harnse off this motor sense i gave the other motor and wires to a buddy. I Have all the computer and everything for this one. But what i want to do is wire up the two o2 sensors together so i will get readings from both sides and would be able to plug it into the 351 wireing harnes.

Wicked_S10 · 01-05-2008, 05:00 AM

No, you can't wire the two sensors together, it doesn't work that way. Put one sensor in the Y pipe or H pipe if you have duals.

mj · 01-05-2008, 12:39 PM

one sensor is all it needs

Rockcrawler_101 · 01-05-2008, 12:51 PM

Dang well that just sucks but firgured it wouldnt work out that way. Thanks

Wicked_S10 · 01-05-2008, 02:40 PM

Just a side note, you mention in your OP that a single sensor would have to go "way down" due to your exhaust design. If you put it very far from the manifolds/headers the O2 sensor will never work correctly. Worst case scenario put it just down stream of one of the collectors. It will only read one bank that way, but it doesn't make a lot of difference on early FI as the single O2 sensor design adjusts the mixture for all of the cylinders based on its reading. The only way you could get into a lot of trouble is if the bank w/o the sensor got really screwed up... catastrophic fuel delivery issues are not what it is there for anyhow, so I think you will be all right with it in just one collector.

Later,
Jason

Rockcrawler_101 · 01-06-2008, 03:15 AM

Sweet that will save alot of work. Thanks

01-04-2008, 12:56 AM	#1 (permalink)
Rockcrawler_101 Registered User Join Date: May 2002 Member # 11955 Location: San Juan Bautista, CA Posts: 926	One o2 to two o2 IM doing a 5.0 to 5.8 swap and the 5.0 had two o2 snesors and the 5.8 has just one. Is there any way to wire it up so i could use the two o2 sensors instead of having to put the one in because the way my exaust is setup it would have to be way down the exaust sytem and really hard to do. __________________ 48 willys pickup on 1 tons, 5.8L and 44's. 01 ford superduty 4x4 6 speed.

01-04-2008, 03:42 PM	#4 (permalink)
Wicked_S10 Registered User Join Date: Nov 2002 Member # 14848 Location: Midland, Mi Posts: 1,750	Who burns truck ECMs? Last I heard, the only ECMs with after market support were the 5.0 mustang and the post '96 OBDII truck ecms... Later, Jason __________________ 2006 JCORF Buggy, 60's,Locked F&R,42" TSLs,EFI460,C6,Atlas5.0 Comp Case 1988 Bronco,in progress

01-04-2008, 08:45 PM	#5 (permalink)
Rockcrawler_101 Registered User Join Date: May 2002 Member # 11955 Location: San Juan Bautista, CA Posts: 926	I didnt want to do that because i want to keep the wiring harnse off this motor sense i gave the other motor and wires to a buddy. I Have all the computer and everything for this one. But what i want to do is wire up the two o2 sensors together so i will get readings from both sides and would be able to plug it into the 351 wireing harnes. __________________ 48 willys pickup on 1 tons, 5.8L and 44's. 01 ford superduty 4x4 6 speed.

01-05-2008, 05:00 AM	#6 (permalink)
Wicked_S10 Registered User Join Date: Nov 2002 Member # 14848 Location: Midland, Mi Posts: 1,750	No, you can't wire the two sensors together, it doesn't work that way. Put one sensor in the Y pipe or H pipe if you have duals. __________________ 2006 JCORF Buggy, 60's,Locked F&R,42" TSLs,EFI460,C6,Atlas5.0 Comp Case 1988 Bronco,in progress

01-05-2008, 12:51 PM	#8 (permalink)
Rockcrawler_101 Registered User Join Date: May 2002 Member # 11955 Location: San Juan Bautista, CA Posts: 926	Dang well that just sucks but firgured it wouldnt work out that way. Thanks __________________ 48 willys pickup on 1 tons, 5.8L and 44's. 01 ford superduty 4x4 6 speed.

01-04-2008, 03:04 PM	#2 (permalink)
OrangeBronc79 Next Level Join Date: Jan 2006 Member # 66132 Location: Hagerstown, MD Posts: 36	Why don't you just use the 302 computer and get a custome burn. They are cheap and very effective. Don't see the problem just running one though.

01-04-2008, 03:16 PM	#3 (permalink)
Nor Cal Wheelin Banned Join Date: Oct 2004 Member # 36711 Location: Elk Horn, North Salinas Posts: 1,430	Havent seen you around in a while. X's 2 on the 302 computer though, dont see why that wouldnt work.

01-05-2008, 12:39 PM	#7 (permalink)
mj Registered User Join Date: Oct 2000 Member # 1919 Location: BC Canada Posts: 7,547	one sensor is all it needs

01-05-2008, 02:40 PM	#9 (permalink)
Wicked_S10 Registered User Join Date: Nov 2002 Member # 14848 Location: Midland, Mi Posts: 1,750	Just a side note, you mention in your OP that a single sensor would have to go "way down" due to your exhaust design. If you put it very far from the manifolds/headers the O2 sensor will never work correctly. Worst case scenario put it just down stream of one of the collectors. It will only read one bank that way, but it doesn't make a lot of difference on early FI as the single O2 sensor design adjusts the mixture for all of the cylinders based on its reading. The only way you could get into a lot of trouble is if the bank w/o the sensor got really screwed up... catastrophic fuel delivery issues are not what it is there for anyhow, so I think you will be all right with it in just one collector. Later, Jason __________________ 2006 JCORF Buggy, 60's,Locked F&R,42" TSLs,EFI460,C6,Atlas5.0 Comp Case 1988 Bronco,in progress Last edited by Wicked_S10; 01-05-2008 at 02:40 PM.

01-06-2008, 03:15 AM	#10 (permalink)
Rockcrawler_101 Registered User Join Date: May 2002 Member # 11955 Location: San Juan Bautista, CA Posts: 926	Sweet that will save alot of work. Thanks __________________ 48 willys pickup on 1 tons, 5.8L and 44's. 01 ford superduty 4x4 6 speed.

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