1FZ-FE EGR

Joined
Sep 27, 2021
Messages
4
Location
Seattle WA
Hi - I removed the upper intake manifold from my '95 FZJ80 to sort out some evap system issues and clear my EGR passages.
Everything is going OK (aside from most of the evap doodads being toast) EXCEPT: There is a vac hose from the EGR valve straight to a small steel tube sticking out of the manifold, between the #5 and #6 runners. There is a matching tube on the other (bottom) side, with a vac hose leading to the VSV. It looks like one tube routed straight through the manifold like an arrow. Problem is, when I try to run a paper clip through it from either end, it stops solid at about a half inch in. Can anyone tell me if it IS indeed one straight tube? I am tempted to run a drill through it, but if they are really two separate tubes that angle off into passages inside the manifold casting, that would be a very big OOPS!
 
Joined
Mar 15, 2021
Messages
113
Location
sacramento
Hi - I removed the upper intake manifold from my '95 FZJ80 to sort out some evap system issues and clear my EGR passages.
Everything is going OK (aside from most of the evap doodads being toast) EXCEPT: There is a vac hose from the EGR valve straight to a small steel tube sticking out of the manifold, between the #5 and #6 runners. There is a matching tube on the other (bottom) side, with a vac hose leading to the VSV. It looks like one tube routed straight through the manifold like an arrow. Problem is, when I try to run a paper clip through it from either end, it stops solid at about a half inch in. Can anyone tell me if it IS indeed one straight tube? I am tempted to run a drill through it, but if they are really two separate tubes that angle off into passages inside the manifold casting, that would be a very big OOPS!

Hi - I removed the upper intake manifold from my '95 FZJ80 to sort out some evap system issues and clear my EGR passages.
Everything is going OK (aside from most of the evap doodads being toast) EXCEPT: There is a vac hose from the EGR valve straight to a small steel tube sticking out of the manifold, between the #5 and #6 runners. There is a matching tube on the other (bottom) side, with a vac hose leading to the VSV. It looks like one tube routed straight through the manifold like an arrow. Problem is, when I try to run a paper clip through it from either end, it stops solid at about a half inch in. Can anyone tell me if it IS indeed one straight tube? I am tempted to run a drill through it, but if they are really two separate tubes that angle off into passages inside the manifold casting, that would be a very big OOPS!
Checked mine yesterday, drill bit slides through. So, yours is clogged. I'd drill it out. I was prepared for that myself.
Good news for you, you will have resolved at least one problem.
 

NLXTACY

Wits' End
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Joined
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Messages
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Location
sacramento
Wow, that threads got some really funny stuff.

Full disclosure, I guess...
My engine is out and apart. so EVERYTHING is easy to look at/work on. Relatively speaking, anyway :meh: :bang:
 
Joined
Sep 27, 2021
Messages
4
Location
Seattle WA
Checked mine yesterday, drill bit slides through. So, yours is clogged. I'd drill it out. I was prepared for that myself.
Good news for you, you will have resolved at least one problem.
Thanks a bunch! I like it when people tell me what I want to hear!
 
Joined
Jan 18, 2018
Messages
295
Location
Nashville(ish), TN
So what does this passage actually become clogged with? I mean, I get that it's always "carbon" but where is that coming from? It can't be hot EGR gases.
 
Joined
Apr 19, 2011
Messages
160
Location
Russia, far east
So what does this passage actually become clogged with? I mean, I get that it's always "carbon" but where is that coming from? It can't be hot EGR gases.
Carbon particles in exhaust gases via egr mixing with oil clouds from PCV. I cut off my egr 9y ago, 0% carbon since that time, doesn't need even cleaning throttle body so often like before. Carbon from egr will builup even on top of intake valves
 

COYS

SILVER Star
Joined
Feb 27, 2018
Messages
1,360
Location
Los Santos
Hi - I removed the upper intake manifold from my '95 FZJ80 to sort out some evap system issues and clear my EGR passages.
Everything is going OK (aside from most of the evap doodads being toast) EXCEPT: There is a vac hose from the EGR valve straight to a small steel tube sticking out of the manifold, between the #5 and #6 runners. There is a matching tube on the other (bottom) side, with a vac hose leading to the VSV. It looks like one tube routed straight through the manifold like an arrow. Problem is, when I try to run a paper clip through it from either end, it stops solid at about a half inch in. Can anyone tell me if it IS indeed one straight tube? I am tempted to run a drill through it, but if they are really two separate tubes that angle off into passages inside the manifold casting, that would be a very big OOPS!
Is this what you’re referring to? I was watching Otramm and he specifically pointed the need to unclog this bit out on his YouTube video.

E4E8D993-9141-47F5-9EEC-4A5DDDC47B65.png


378814A1-F740-4C22-8DAF-35D1E7D3D1CB.png
 

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