none of that is stock original (CAT) it's all welded in by some local shop., ALIEN parts..
the rear O2 sensor goes to a under seat of drivers seat rubber grommet,
the front 02 is on the exhaust header,
all these manifold made by Suzuki are junk , they love to crack. (too thin and weak) (or owners abused the car, ?)
the link above ending in Jx is dead. (not public set, and blocked.
the front 02 sensor must not be exposed to cracks. (that includes bottom header gasket and the head to manifold flange gasket, NO LEAKS HERE allowed on any car 1996 USA or newer)
factoid #1:
when the exhaust port barks (putts) the pressure goes positive then negative, (see graphic for proof)
when it does that, and there is a crack, the crack sucks in 20% Oxygen this blinds the O2, like you looking into the sun,. this is how ant 02 front works, and bad deal for fueling.
and will be worse at idle. most times. (no cruising data presented)
this is pure physics you hear a putt, about it is more complex, per this great drawing of the pressure wave.
POINT B is when the crack sucks in 20% oxygen from the atmosphere. (20.9 at sealevel and 10% on the highest road in the world 18k feet)
TDC is top dead center
BDC is bottom dead center. "A" is the exhaust valve opening. (overlap is Intake and exhaust valve overlap period)
this is the first thing to learn about how EFI works and AFR , Air fuel ratio's work on a hot engine, closed loop. if the ECU can not get rational readings from the front O2 the ECU ends closed loop. ( this is like you trying to hang glide in a tornado, you park you wings and go to the basement at home and hide. until things get better.
The sensor must not be covered in mud or oil or grease, the sensor has 2 ports, one inside and on air port on the outside and the outside too must not be clogged with junk.
If you unscrew the front 02, many folks see 2 things, bad. then tip is a wreck or the top is buried in black carbon.
Also one more fact, on engines, like this, that is when the engine goes rich that means the fuel (un-burned fully)exits the engine, this cloud of unburned fuel does 2 bad things.
1: makes the CAT burn up inside and even melt inside. (the cat glows red at cruise) not good ever.
2: makes the exhaust manifold glow red (like a jet engine afterburner) and the exh.. Manifold cracks, (over stressed)
this is common when folks don't do tune-ups (a.k.a service points) checking the EFI for errors and new 02 (front S1) sensor at 90k miles.
this are cascade failures, one part fails and takes out others.... (most times the DASH CEL lamp blinks 1996 and newer cars) the owners manual tells you that means car needs service, or damage happens, my car , even states, do no not tow a trailer , get the car repaired now, in a shop, they say that so the cat does not MELT, for a fact.
THE EFI does all that and more.
![[Image: exhaustscavenging-p1-1.JPG]](https://fixkick.com/exhaust/exhaustscavenging-p1-1.JPG)
the rear O2 sensor goes to a under seat of drivers seat rubber grommet,
the front 02 is on the exhaust header,
all these manifold made by Suzuki are junk , they love to crack. (too thin and weak) (or owners abused the car, ?)
the link above ending in Jx is dead. (not public set, and blocked.
the front 02 sensor must not be exposed to cracks. (that includes bottom header gasket and the head to manifold flange gasket, NO LEAKS HERE allowed on any car 1996 USA or newer)
factoid #1:
when the exhaust port barks (putts) the pressure goes positive then negative, (see graphic for proof)
when it does that, and there is a crack, the crack sucks in 20% Oxygen this blinds the O2, like you looking into the sun,. this is how ant 02 front works, and bad deal for fueling.
and will be worse at idle. most times. (no cruising data presented)
this is pure physics you hear a putt, about it is more complex, per this great drawing of the pressure wave.
POINT B is when the crack sucks in 20% oxygen from the atmosphere. (20.9 at sealevel and 10% on the highest road in the world 18k feet)
TDC is top dead center
BDC is bottom dead center. "A" is the exhaust valve opening. (overlap is Intake and exhaust valve overlap period)
this is the first thing to learn about how EFI works and AFR , Air fuel ratio's work on a hot engine, closed loop. if the ECU can not get rational readings from the front O2 the ECU ends closed loop. ( this is like you trying to hang glide in a tornado, you park you wings and go to the basement at home and hide. until things get better.
The sensor must not be covered in mud or oil or grease, the sensor has 2 ports, one inside and on air port on the outside and the outside too must not be clogged with junk.
If you unscrew the front 02, many folks see 2 things, bad. then tip is a wreck or the top is buried in black carbon.
Also one more fact, on engines, like this, that is when the engine goes rich that means the fuel (un-burned fully)exits the engine, this cloud of unburned fuel does 2 bad things.
1: makes the CAT burn up inside and even melt inside. (the cat glows red at cruise) not good ever.
2: makes the exhaust manifold glow red (like a jet engine afterburner) and the exh.. Manifold cracks, (over stressed)
this is common when folks don't do tune-ups (a.k.a service points) checking the EFI for errors and new 02 (front S1) sensor at 90k miles.
this are cascade failures, one part fails and takes out others.... (most times the DASH CEL lamp blinks 1996 and newer cars) the owners manual tells you that means car needs service, or damage happens, my car , even states, do no not tow a trailer , get the car repaired now, in a shop, they say that so the cat does not MELT, for a fact.
THE EFI does all that and more.
http://www.fixkick.com