exhaust and 02 sensor question
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exhaust and 02 sensor question
i have a 90 5 speed 22re, was wondering on a good header choice for this truck. Also, is it OK to run this truck with no cat until i can afford to add it? does it affect engine performance? this truck has a downwind (after cat) o2 sensor, do all efi toyota trucks have that?
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do i answer this and be a nice guy because the kid is new? or do i be a dick and just tell him to "search"
hmm... welcome to yotatech. a good header an LCE..... wait....why dont you have a cat on your truck?
hmm... welcome to yotatech. a good header an LCE..... wait....why dont you have a cat on your truck?
Last edited by Spanky; 09-06-2007 at 05:03 AM.
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A good header is indeed the LCE unit.
You CAN run without a cat, but the 22re has such small displacment that its really not going to net you any gain, you will probibly lose a little low end power. Plus you will be pulluting more.
You need an o2 sensor, every EFI truck has one (or two) but they need to be working correctly.
You CAN run without a cat, but the 22re has such small displacment that its really not going to net you any gain, you will probibly lose a little low end power. Plus you will be pulluting more.
You need an o2 sensor, every EFI truck has one (or two) but they need to be working correctly.
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sorry guys, i did search the headers sorry to beat a dead horse. I know i need an o2 sensor, i meant do all toyota trucks have downwind o2 sensors. I dont have a cat now because when i bought the truck the exhaust had broken off at the manifold and there was nothing left. just wondered if i would lean it out by not running one until i can afford to get a proper exhaust done, also wondering if i could move my sensor up on the header.
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sorry guys, i did search the headers sorry to beat a dead horse. I know i need an o2 sensor, i meant do all toyota trucks have downwind o2 sensors. I dont have a cat now because when i bought the truck the exhaust had broken off at the manifold and there was nothing left. just wondered if i would lean it out by not running one until i can afford to get a proper exhaust done, also wondering if i could move my sensor up on the header.
yes, you can run without a cat for a little while.
But I wouldnt move the o2 sensor anywhere but the stock location.
#6
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sorry guys, i did search the headers sorry to beat a dead horse. I know i need an o2 sensor, i meant do all toyota trucks have downwind o2 sensors. I dont have a cat now because when i bought the truck the exhaust had broken off at the manifold and there was nothing left. just wondered if i would lean it out by not running one until i can afford to get a proper exhaust done, also wondering if i could move my sensor up on the header.
If the exhaust was broken off as you say, it's illegal to be sold in that condition.
Fred
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i have a 90 5 speed 22re, was wondering on a good header choice for this truck. Also, is it OK to run this truck with no cat until i can afford to add it? does it affect engine performance? this truck has a downwind (after cat) o2 sensor, do all efi toyota trucks have that?
and No don't move it anywhere else.. it was designed to get its readings where it is.. unless sumones already moved it to its location after the cat
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#8
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What good would it do to have it before the cat ?
Fred
#9
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Dyno shops can run them post-cat to get A/F for dyno runs, so either position must work.. I don't know what they measure that is different.
#10
I figured since the truck was running fine now with just the one sensor, I might as well save the $60 and the time of wiring in a second sensor pre-cat. Would I notice any difference with a second sensor, or should I just leave it the way it is?
#12
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pre cat o2 sensor reads air to fuel ratio and is critical. if you only have one that's what it does. if you have 2 the second placed after the cat is tipicaly for newer vehicles and reads your emisions. you only need the one to run and that's the air fuel. as far as a 02 sensor in the manifold that's the egr not 02 it may be right after but I've never heard or seen one in the manifold itself.
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I have no pre cat o2 sensor, nothing in the manifold, nothing in the pipe as far as i can tell, the pipe itself was gone but there were no plugs or wires hanging anywhere that i can see, is that normal?
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