Emissions help needed...
Thread Starter
Joined: Jan 2002
Posts: 11,093
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From: Hood River oregon
Originally posted by Keith
J-rat, split air solenoid is toward the firewall, kind of behind the swithing valve. It has a little metal piston on it. If this valve is not turned on, there will be minimal air flow to split air, because the port is sealed by it. Try it with the piston removed, you should get airflow.
Irv, Keith's dad
J-rat, split air solenoid is toward the firewall, kind of behind the swithing valve. It has a little metal piston on it. If this valve is not turned on, there will be minimal air flow to split air, because the port is sealed by it. Try it with the piston removed, you should get airflow.
Irv, Keith's dad
Rat
Thread Starter
Joined: Jan 2002
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From: Hood River oregon
Originally posted by HAILERS
SIX ROTORS.....It WILL work because the rotor housings have been swapped. That means although the port air is now trapped in the rear part of the rear housing and the front part of the front housing, its only because there is no out let at those points. The half inch hole in those specific areas is coverd by the exaust gasket and the lack of a similar half inch hole in the exaust manifold. If a half inch hole was bored in the exaust gasket and the exaust manifod at those points, then the air will flow from the acv into the exaust stream ... I will concede that I was wrong when I said bore four holes. The two middle holes, due to the swapping of the housings, have no path to the acv. By the way, I'm cheating on you guys. I have a spare engine houusings sitting on top of my washing machine and I can SEE the holes for the acv/egr. Note that the path for the EGR is now not the single half inch hole in the fwd end of the rear rotor housing but the path to the EGR is now both diffuser in the exaust ports plus the half inch hole in the front of the rear rotor housing. Grab a couple of rotor housings and swap places with them and put a middle housing in the center and you will see what alll the above gibberish is about. Do it. Take that exaust manifold off with the gasket. Drill into the manifold at the two out board half inch holes plus into the gasket. Tell you what. I'm swapping my Racing BEat exaust back onto the car this weekend, so I won't need my exaust manifold for a year. If I determine that there is enough material there to drill the two half inch holes, and do drill them, will you pay for the shipping charges and let me have your old manifold back if it works. I don't wanna pay any shipping cost either way.
SIX ROTORS.....It WILL work because the rotor housings have been swapped. That means although the port air is now trapped in the rear part of the rear housing and the front part of the front housing, its only because there is no out let at those points. The half inch hole in those specific areas is coverd by the exaust gasket and the lack of a similar half inch hole in the exaust manifold. If a half inch hole was bored in the exaust gasket and the exaust manifod at those points, then the air will flow from the acv into the exaust stream ... I will concede that I was wrong when I said bore four holes. The two middle holes, due to the swapping of the housings, have no path to the acv. By the way, I'm cheating on you guys. I have a spare engine houusings sitting on top of my washing machine and I can SEE the holes for the acv/egr. Note that the path for the EGR is now not the single half inch hole in the fwd end of the rear rotor housing but the path to the EGR is now both diffuser in the exaust ports plus the half inch hole in the front of the rear rotor housing. Grab a couple of rotor housings and swap places with them and put a middle housing in the center and you will see what alll the above gibberish is about. Do it. Take that exaust manifold off with the gasket. Drill into the manifold at the two out board half inch holes plus into the gasket. Tell you what. I'm swapping my Racing BEat exaust back onto the car this weekend, so I won't need my exaust manifold for a year. If I determine that there is enough material there to drill the two half inch holes, and do drill them, will you pay for the shipping charges and let me have your old manifold back if it works. I don't wanna pay any shipping cost either way.
Hold on a sec!! Unless you are interested in this as an experiment, I would wait. As soon as I get some money together, the motor is coming out, and getting rebuilt or replaced by a good one. So I am just gonna drive it as is, except I am taking off the Cats and putting my old cats back on, gutted. In my opinion, its becoming WAY to difficult to pinpoint the cause of my other problems (if I even have any) because of the rotor housing problem. What I need to do is start with a clean slate.
Rat
Thread Starter
Joined: Jan 2002
Posts: 11,093
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From: Hood River oregon
I suppose the point here is no longer emissions, since I am on a waiver, and need to pull the motor and repair it. The point is, that I am still running rich...My theory is that this is a direct result of the swapped housings effectively disabling EGR. But I am also gonna try the AFM and the ECU. I should be replacing in the next month or two, and then I can voluntarily have my car emissions tested. I will be more then happy to post results at this time..
Rat
Rat
Greek Power
Joined: Aug 2001
Posts: 2,375
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From: Greece
Hey J-Rat, isnt it funny that in that other thread there are a bunch of people passing emissions with straight pipes and NO cats whatsoever, and here you are unable to pass emissions after what ? 20 tries 
....maybe if you took over the world, you could arrange for your Rex to pass....
....maybe if you took over the world, you could arrange for your Rex to pass....
Thread Starter
Joined: Jan 2002
Posts: 11,093
Likes: 2
From: Hood River oregon
Originally posted by The Ace
Hey J-Rat, isnt it funny that in that other thread there are a bunch of people passing emissions with straight pipes and NO cats whatsoever, and here you are unable to pass emissions after what ? 20 tries
....maybe if you took over the world, you could arrange for your Rex to pass....
Hey J-Rat, isnt it funny that in that other thread there are a bunch of people passing emissions with straight pipes and NO cats whatsoever, and here you are unable to pass emissions after what ? 20 tries
....maybe if you took over the world, you could arrange for your Rex to pass....
Greek Power
Joined: Aug 2001
Posts: 2,375
Likes: 0
From: Greece
Originally posted by J-Rat
You know what? Its a DAMN good thing I have a sense of humor about this... And if I did take over the world, I would make RX-7s emissions exempt. Then I would come after YOU!!!!..............
You know what? Its a DAMN good thing I have a sense of humor about this... And if I did take over the world, I would make RX-7s emissions exempt. Then I would come after YOU!!!!..............
HAILERS
Joined: May 2001
Posts: 20,563
Likes: 27
From: FORT WORTH, TEXAS,USA
Well I swapped the exaust systems on my 87 n/a today and there is enough room on the flange of the exaust manifold to drill two half inch holes for the two outboard holes on the rotor housings. They'd have to be angled at an angle like the already existing one on the rear exaust hole, but it could be done. Drilling the hole in the exaust gasket would have to be carefully done though in order to leave enough gasket material to seal, but no more difficult than the existing hole in the gasket. Yeah, I'll just let the thought die. Hate to see a piece of metal beat you though. And here's a very big HAwiian sign of good luck(you'd have to remember the Pueblo captured by North Korea to get the drift of that phrase) to all those ******** who build engines and don't pay attention to what they are doing and especially those that think theres no difference b/t the front and rear housing.
Thread Starter
Joined: Jan 2002
Posts: 11,093
Likes: 2
From: Hood River oregon
Originally posted by HAILERS
Well I swapped the exaust systems on my 87 n/a today and there is enough room on the flange of the exaust manifold to drill two half inch holes for the two outboard holes on the rotor housings. They'd have to be angled at an angle like the already existing one on the rear exaust hole, but it could be done. Drilling the hole in the exaust gasket would have to be carefully done though in order to leave enough gasket material to seal, but no more difficult than the existing hole in the gasket. Yeah, I'll just let the thought die. Hate to see a piece of metal beat you though. And here's a very big HAwiian sign of good luck(you'd have to remember the Pueblo captured by North Korea to get the drift of that phrase) to all those ******** who build engines and don't pay attention to what they are doing and especially those that think theres no difference b/t the front and rear housing.
Well I swapped the exaust systems on my 87 n/a today and there is enough room on the flange of the exaust manifold to drill two half inch holes for the two outboard holes on the rotor housings. They'd have to be angled at an angle like the already existing one on the rear exaust hole, but it could be done. Drilling the hole in the exaust gasket would have to be carefully done though in order to leave enough gasket material to seal, but no more difficult than the existing hole in the gasket. Yeah, I'll just let the thought die. Hate to see a piece of metal beat you though. And here's a very big HAwiian sign of good luck(you'd have to remember the Pueblo captured by North Korea to get the drift of that phrase) to all those ******** who build engines and don't pay attention to what they are doing and especially those that think theres no difference b/t the front and rear housing.
HAILERS
Joined: May 2001
Posts: 20,563
Likes: 27
From: FORT WORTH, TEXAS,USA
Just some pic I took. The rear side housing is on the far left and the *FRONT*rotor housing is sitting where the rear rotor housing should be. I put white strips of paper to show where the air should flow from the top of the rear side housing, down to its bottom, then forward to the rotor housing. As its configured wrong, there is only one half inch hole there, and it meets a dead end because the half inch hole has the exausst gasket in the way. There should have been a second hole that should have gone in and out of the big exaust port. You will see that is what happens on the right side of the rotor housing. Two white strips of paper enter on the right bottom, and one exits thru the half inch hole and the other thru the diffuser in the exaust port. Unfortunatly no port air comes from the right side of the rotor housing. I'm going to post about four pictures just because I wanna. Here's the first:
HAILERS
Joined: May 2001
Posts: 20,563
Likes: 27
From: FORT WORTH, TEXAS,USA
In the jpg under* AND THREE*: What I did was put strips of paper in the holes. You see on the left of the ROTOR HOUSING, there is but one paper strip entering the ROTOR HOUSING from the rear side housing. That paper is exiting out one of the half inch in size holes. If this was not the wrong housing, it would not exit there, but go out the large exaust port. Thats what is showing on the right hand side of the ROTOR HOUSING. (On that side I was trying to show that there are two holes(two strips of paper) inside that hole. One goes out the half inch size hole(just to the right of the one mentioned above) and the second piece of paper is exiting the diffuser in the large exaust port. If that ROTOR HOUSING was the correct one, the piece of paper coming out of the large exaust hole, would originate from the left side instead of the right side. But anyway, the hole that would have to be drilled, would be the half inch in size hole on your left. Right now the air from the acv has no place to go because that hole on the left is blocked by the exaust gasket plus there's no hole in the exaust manifold in that area. I that hole on the left had access to the manifold, then the acv air would mix in the exaust manifold, much as it would if it had gone into the diffuser. Same situation exists on the forward ROTOR HOUSING. Except on that housing it would be the far right half inch hole that would need to be drilled. It'll all make sense when you take the engine apart someday. I'm against rebuilding the engine at this point. Its not worth it since you have a sticker. The above makes sense to me, I'm not too worried about the rest of the world. They're too busy ragging some guy who asked for it.
Thread Starter
Joined: Jan 2002
Posts: 11,093
Likes: 2
From: Hood River oregon
HAILERS and Six Rotors...Look what I found...
The Thermo Sensor connectors were broken off. I dont know why. Hopefully I can get one tomorrow at work..
Rat
The Thermo Sensor connectors were broken off. I dont know why. Hopefully I can get one tomorrow at work..
Rat
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