Catalytic Convert Confusion/Civic VX

[Davo53209@yahoo.com]

Originally Posted by California98Civic

I'd check the Majestic Honda site and compare their images of the 1992-1995 CX and the VX manifolds and CATs. But my gut tells me they are different. The VX manifold is part of the car's "magic mileage" design (i.e. "lean burn") as I understand it.

james

I took your advise at checked the manifolds & CATs from Majestic Honda and noticed that both items have the same part numbers for the CX & VX. So does that mean they're the same parts? Anyone have any thoughts?

[ecoTex]

http://ecomodder.com/forum/showthrea...tml#post412642 slownugly has parts and knowledge. You should hit him up

[Davo53209@yahoo.com]

Originally Posted by ecoTex

http://ecomodder.com/forum/showthrea...tml#post412642 slownugly has parts and knowledge. You should hit him up

Message sent, now crossing fingers. More input however is always appreciated.

[Davo53209@yahoo.com]

Originally Posted by Cobb

Interesting tri-y exhaust manifold or should I say 4 to 2 to 1.

My car has no header, just an oval opening to the cat 1, then cat 2 is around the corner.

Why do you suppose mine might have been done this way?

[ecoTex]

Either the cat failed, or the previous owner was trying to make power.

[Davo53209@yahoo.com]

What is the difference between a CX & VX exhaust manifold? So far, I've noticed that they have the same part number. Is there are significant difference?

[California98Civic]

Originally Posted by Davo53209@yahoo.com

What is the difference between a CX & VX exhaust manifold? So far, I've noticed that they have the same part number. Is there are significant difference?

The 1992-1995 CX did not have lean burn, so it did not have the wideband O2 sensor plugged in just ahread of the CAT in the exhaust minifold. But if you are correct and that part number is the same, then I've learned something too. I guess you could get the CX manifold and use it and still get lean burn because you'll have the wideband O2... have you checked to make sure it's the wideband O2? I think it is 5 wire instead of the 4 wire. I think.

[Davo53209@yahoo.com]

Originally Posted by California98Civic

The 1992-1995 CX did not have lean burn, so it did not have the wideband O2 sensor plugged in just ahread of the CAT in the exhaust minifold. But if you are correct and that part number is the same, then I've learned something too. I guess you could get the CX manifold and use it and still get lean burn because you'll have the wideband O2... have you checked to make sure it's the wideband O2? I think it is 5 wire instead of the 4 wire. I think.

Both parts diagrams & numbers seem to match up for the CX & VX exhaust manifolds as well as the catalytic converter. Like most people, I've been taught to believe that both parts for the VX are somehow different, whereby impacting fuel economy.

Maybe it's the addition of the 5-wire O2 sensor that adds to the significance. This could make an interesting dialogue with the rest of the forum. More thoughts on this would be great.

As a side note, awhile back, I was able to find the 5-wire O2 sensor for under $200.00. I'm just happy that I never plugged it into my current tri-y exhaust manifold. It might have been a waste.

[hamsterpower]

I have to agree. That appears to be the manifold from an EX or SI of the same generation. Probably in an attempt to make more power, the previous owner eliminated the catalitic converter. I beleve, like in other model years, it is a simple swap that bolts right up.

I wish you luck finding a stock replacement at a reasonable cost.

[Davo53209@yahoo.com]

I think that you may be right. I was on Ebay recently, whereas I kept running across several exhaust manifolds for a 94 EX & SI that were identical to my setup.

I'm also hoping that I'm right about the CX & VX manifolds being the same, given the matching part numbers. If so, then I may have found a used one locally for $25.00