Injector Bushing? Installation Question
#1
Injector Bushing? Installation Question
I recently performed the Vacuum Hose Job From Hell - nearly every hose and solenoid snapped or crumbled upon removal no matter how gentle I tried to be.
In the process, I broke my oil metering lines because they were as brittle. In order to replace them, I had to pull both fuel rails but I did not remove the injectors from the rails.
I reused the rubber bushings? that were in the iron under the primary injectors and the thinner ones under the secondaries in the upper intake manifold. I plan to buy two of each next time and not cheap out. For the record, the old ones were still soft and pliable.
Needless to say, upon reassembly I have a huge vacuum leak. I can hear the air being sucked in the area of the injectors. The idle is way hugh and hunting. A spray of starting fluid in the injector area confirms that this is where the air leak is.
I have looked at the service manual but I'm not sure how the bushings are supposed to fit in the holes. Can someone help me?
The primaries seem to just fit in the hole and the injector assembly is just tightened down with the plastic insulator between the assembly and iron? The bushing is just placed in the recess on the iron and the seal is formed from the flat part of the injector pressing against the rubber? OR do I install the seal on the injector somehow?
As far as the secondaries - (where I really suspect the problem is...) I figured the thinner bushing was to be installed on the injector and then inserted into the lower intake manifold? I really think this is where I fucked up but not 100% sure.
Bottom line: I really (really) don't want to tear the engine down to the block a THIRD time if I **** it up again. Is there a better digram available or assembly instructions available for these four bushings?
Thanks in advance.
In the process, I broke my oil metering lines because they were as brittle. In order to replace them, I had to pull both fuel rails but I did not remove the injectors from the rails.
I reused the rubber bushings? that were in the iron under the primary injectors and the thinner ones under the secondaries in the upper intake manifold. I plan to buy two of each next time and not cheap out. For the record, the old ones were still soft and pliable.
Needless to say, upon reassembly I have a huge vacuum leak. I can hear the air being sucked in the area of the injectors. The idle is way hugh and hunting. A spray of starting fluid in the injector area confirms that this is where the air leak is.
I have looked at the service manual but I'm not sure how the bushings are supposed to fit in the holes. Can someone help me?
The primaries seem to just fit in the hole and the injector assembly is just tightened down with the plastic insulator between the assembly and iron? The bushing is just placed in the recess on the iron and the seal is formed from the flat part of the injector pressing against the rubber? OR do I install the seal on the injector somehow?
As far as the secondaries - (where I really suspect the problem is...) I figured the thinner bushing was to be installed on the injector and then inserted into the lower intake manifold? I really think this is where I fucked up but not 100% sure.
Bottom line: I really (really) don't want to tear the engine down to the block a THIRD time if I **** it up again. Is there a better digram available or assembly instructions available for these four bushings?
Thanks in advance.
#4
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The primary inj seals set on top of the center iron but not down in the hole. They seal the top of the inj to the top of the inj hole. Mazdas picture of them is wrong as they are different than the secondary seal which is what Mazda shown for them!
The secondary seals set inside the hole on top of the diffusers. The inj tip is then compressed against the seal. No wrapping around.
.
The secondary seals set inside the hole on top of the diffusers. The inj tip is then compressed against the seal. No wrapping around.
.
#5
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the seal was damaged on mine also and i replaced it with two injector orings works perfect actually has a little better seal. Take the good seal to a auto parts store and compare with the orings they have ..
#6
The primary inj seals set on top of the center iron but not down in the hole. They seal the top of the inj to the top of the inj hole. Mazdas picture of them is wrong as they are different than the secondary seal which is what Mazda shown for them!
The secondary seals set inside the hole on top of the diffusers. The inj tip is then compressed against the seal. No wrapping around.
.
The secondary seals set inside the hole on top of the diffusers. The inj tip is then compressed against the seal. No wrapping around.
.
Now the secondaries ARE different and I am almost sure they are the ones leaking. So - do I put the seals inside the hole in the upper intake first and then tighten the fuel rail?
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#8
^^ There isn't a fuel leak. I never removed the injectors from the rails - I removed the rails in one piece to access the MOP lines. I'm pretty sure the secondaries shouldn't be operating at idle anyway.
There IS a BIG *** vacuum leak. I can hear it whooshing and the car hunts for idle continuously.
I am pretty sure its because I put the secondary seals on the injectors and installed them instead of putting them on the diffuser. They were thinner than the ones on the primaries so it looked like thats how they should have went.
There IS a BIG *** vacuum leak. I can hear it whooshing and the car hunts for idle continuously.
I am pretty sure its because I put the secondary seals on the injectors and installed them instead of putting them on the diffuser. They were thinner than the ones on the primaries so it looked like thats how they should have went.
#10
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This thread will answer all your questions.
https://www.rx7club.com/showthread.p...=injector+rail
You can make your own insulator/seal...
Good luck.
-Spence
https://www.rx7club.com/showthread.p...=injector+rail
You can make your own insulator/seal...
Good luck.
-Spence
#11
^^ There isn't a fuel leak. I never removed the injectors from the rails - I removed the rails in one piece to access the MOP lines. I'm pretty sure the secondaries shouldn't be operating at idle anyway.
There IS a BIG *** vacuum leak. I can hear it whooshing and the car hunts for idle continuously.
I am pretty sure its because I put the secondary seals on the injectors and installed them instead of putting them on the diffuser. They were thinner than the ones on the primaries so it looked like thats how they should have went.
There IS a BIG *** vacuum leak. I can hear it whooshing and the car hunts for idle continuously.
I am pretty sure its because I put the secondary seals on the injectors and installed them instead of putting them on the diffuser. They were thinner than the ones on the primaries so it looked like thats how they should have went.
Out of my frustration of trying to work in that mess they call the rats nest, I swapped the primary rail and secondary rail bolts... the secondary rail bolts are longer and don't allow the rail to sit all the way flush...
I am not saying you did what I did, but try wiggling the primary rail, if it moves, you did it.
#12
I had the exact same thing happen, only I am an idiot.
Out of my frustration of trying to work in that mess they call the rats nest, I swapped the primary rail and secondary rail bolts... the secondary rail bolts are longer and don't allow the rail to sit all the way flush...
I am not saying you did what I did, but try wiggling the primary rail, if it moves, you did it.
Out of my frustration of trying to work in that mess they call the rats nest, I swapped the primary rail and secondary rail bolts... the secondary rail bolts are longer and don't allow the rail to sit all the way flush...
I am not saying you did what I did, but try wiggling the primary rail, if it moves, you did it.
I really help this helps someone else:
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