GSL SE Missing/Misfire
07-08-09, 01:02 PM
#26
Old Car, Young man
Thread Starter
iTrader: (1)
Join Date: Jul 2005
Location: Saskatchewan Canada
Posts: 357
Likes: 0
Received 0 Likes
on
0 Posts
I was reviewing the pictures here a second ago Kent, quick question:
Yellow colored 'chamber' https://www.rx7club.com/showthread.p...Vacuum+diagram
Appears to be broken. The clip that holds it in place is broken, and it's free to bounce around.
Whats the purpose of that unit? It goes to the BAC? I assume, with the BAC being a pretty big player in the game of emissions, that that little chamber is important?
Yellow colored 'chamber' https://www.rx7club.com/showthread.p...Vacuum+diagram
Appears to be broken. The clip that holds it in place is broken, and it's free to bounce around.
Whats the purpose of that unit? It goes to the BAC? I assume, with the BAC being a pretty big player in the game of emissions, that that little chamber is important?
07-08-09, 01:08 PM
#27
I'm confused becuase you said:
The diagram shows that all 4 injectors goes to the spider, then the spider leads to one of the front nipples. The other line that comes from under there is the air bleed socket. That is routed directly to one of the front nipples. It is the same color on the diagram and many people mix this one up.
The cold start assist is a large nipple under the UIM near the air bleed socket. The part it connects to is brass (like a little block with the nipple curving up). If this is just dangling around somewhere, maybe you unbolted this block by mistake. That would give you a vac leak.
There is a nipple under the throttle plates that goes to the thermowax system (white thing with two small coolant lines attached). Is that what you are talking about?
It's definatly a vaccuum leak. I've plumbed the oil injectors wrong. According to the FSM for engines, the front oil injector goes to one of the four nipples on the front of the dynamic chamber. I've instead plumbled all for to a vacuum spider thing, and past that point, I have no idea were one or two of the vacuum lines go.
The cold start assist is a large nipple under the UIM near the air bleed socket. The part it connects to is brass (like a little block with the nipple curving up). If this is just dangling around somewhere, maybe you unbolted this block by mistake. That would give you a vac leak.
There is a nipple under the throttle plates that goes to the thermowax system (white thing with two small coolant lines attached). Is that what you are talking about?
07-08-09, 01:19 PM
#28
The chamber is used as a reservior of sorts for the vacuum control of the BAC. It gives the system enough volume so that the solenoids can control it. If there is not enough volume, the system will respond too fast for the solenoids to control.
Imagine that you had a tank of gas and you were trying to maintain it at a certain level (say half full) by adding gas while the gas is being burned. If the tank is fairly big, the level doesn't change too fast and you can respond every say 10 minutes and add gas to keep the level. Now imagine that you replaced the gas tank with a 12oz can. Now if you aren't constantly adding gas at the correct rate, the can will be sucked dry in no time.
Basically, this is what the vent/vacuum solenoids are doing. The vacuum will pull the BAC open a bit if the ECU says the idle is too low. If it is then too high, the vent solenoid will open to close the BAC a bit. This solenoids constantly open/close to control pressure in that chamber which determines the BAC position. So, you need the chamber for a properly functioning BAC system, but not having it will not cause the problems you are having (assuming there is no vac leak there).
Edit: if it is just not bolted down, that is fine. Just needs to be connected without cracks in the chamber or any leaks.
Imagine that you had a tank of gas and you were trying to maintain it at a certain level (say half full) by adding gas while the gas is being burned. If the tank is fairly big, the level doesn't change too fast and you can respond every say 10 minutes and add gas to keep the level. Now imagine that you replaced the gas tank with a 12oz can. Now if you aren't constantly adding gas at the correct rate, the can will be sucked dry in no time.
Basically, this is what the vent/vacuum solenoids are doing. The vacuum will pull the BAC open a bit if the ECU says the idle is too low. If it is then too high, the vent solenoid will open to close the BAC a bit. This solenoids constantly open/close to control pressure in that chamber which determines the BAC position. So, you need the chamber for a properly functioning BAC system, but not having it will not cause the problems you are having (assuming there is no vac leak there).
Edit: if it is just not bolted down, that is fine. Just needs to be connected without cracks in the chamber or any leaks.
Last edited by gsl-se addict; 07-08-09 at 01:22 PM.
07-08-09, 01:23 PM
#29
Old Car, Young man
Thread Starter
iTrader: (1)
Join Date: Jul 2005
Location: Saskatchewan Canada
Posts: 357
Likes: 0
Received 0 Likes
on
0 Posts
beat me to it! It's possible that the chamber HAS been cracked, as the clip on the outside that'd you bolt down with has been shattered off. Chances are then, theres likely a small crack in the physical chamber too. Might be something worth replacing!
07-08-09, 01:58 PM
#30
Old Car, Young man
Thread Starter
iTrader: (1)
Join Date: Jul 2005
Location: Saskatchewan Canada
Posts: 357
Likes: 0
Received 0 Likes
on
0 Posts
Is this the cold start assist spot we were talking about?
http://img.photobucket.com/albums/v1...I/IMG_0119.jpg
http://img.photobucket.com/albums/v1...I/IMG_0119.jpg
07-08-09, 04:34 PM
#31
Junior Member
Join Date: Feb 2009
Location: Oak Harbor
Posts: 11
Likes: 0
Received 0 Likes
on
0 Posts
That is not correct. All SE plugs are the same. NGK BR9EQ-14 is typically what is specified for the GSL-SE. NGK BR8EQ-14 is normally specified for the 12A cars. You can run either the 8's or 9's in the GSL-SE, though.
The different plugs for leading/trailing did not start until the 2nd gen cars. What plugs are the dealership giving you? BUR7EQ/BUR9EQ?
The 2nd gen plugs are more likely to be in stock, so that is probably why they are pointing you this way.
I've been dealing with GSL-SEs for 14 years now and Mazdatirix agrees with what we are saying:
http://www.mazdatrix.com/ign-2.htm
It is not that other plugs don't work, but they might be what is specified.
The different plugs for leading/trailing did not start until the 2nd gen cars. What plugs are the dealership giving you? BUR7EQ/BUR9EQ?
The 2nd gen plugs are more likely to be in stock, so that is probably why they are pointing you this way.
I've been dealing with GSL-SEs for 14 years now and Mazdatirix agrees with what we are saying:
http://www.mazdatrix.com/ign-2.htm
It is not that other plugs don't work, but they might be what is specified.
Last edited by fifth7; 07-08-09 at 04:37 PM. Reason: adding
07-08-09, 04:37 PM
#32
Those are 2nd gen plugs not 1st gen.
When we post "Facts" we are stating what applies to the year and model in question.
Yes they work in 1st gen engines but work better if you use the 2nd coil mod.
So this ends the discussion on this and lets stay with the members issue at hand please.
When we post "Facts" we are stating what applies to the year and model in question.
Yes they work in 1st gen engines but work better if you use the 2nd coil mod.
So this ends the discussion on this and lets stay with the members issue at hand please.
Ok this is what I'm running in mine, and what was replaced with at the dealership on my last tune-up. Trailing BUR9EQP T Leading BUR7EQP L. I have not had anything but strong performance. I'm not saying that those are what is supposed to be in it but like I said that is what the dealer did and it runs perfect.
07-08-09, 05:03 PM
#33
Environmentally-Hostile
I would strongly recommend replacing the intake manifold gasket if you have changed its position after it was bolted down. Your going to have to get a razor and some brake cleaner or other tough chemical and just spray and scrape until its off the surface. Its a huge pain, but the only way to get it properly sealed.
07-08-09, 05:59 PM
#34
Is this the cold start assist spot we were talking about?
http://img.photobucket.com/albums/v1...I/IMG_0119.jpg
http://img.photobucket.com/albums/v1...I/IMG_0119.jpg
