I had some noise going on from my intake manifold area about 2 weeks now. Didn't get the chance to take a look at what the issue was.
Started my car up last thursday and noticed a high revving engine all of a sudden, it was like I was on the accelerator till 6500RPM ( my neighbourhood hates me already )
Primary diagnosis was intake manifold gasket was leaking, vacuum loss and the ECU is trying to compensate by dumping more fuel.
Bought a intake manifold gasket and started to dis-assemble with my Mechanic at my house on saturday.
the gasket was the last of my problems. It seemed that the intake air bypass assembly bolt snapped off and the IAB butterfly broke in half ( this is the same type of air intake bypass a GSR or Type R has - opens at 4100RPM for more power and air flow )
I'm lucky it did not end up in the engine
I decided to open the assembly and leave it fully open. I will lose some low end torque by doing so, but just to find this assembly is a real task. Honda wants 491$. Scrappers want to sell me the whole engine for 700-1000$ because without this part the engine does not run. Could not find a blown V6 engine in ontario or quebec.
well because I had to take all of the intake out I decided to do a mild polishing job. Not going to port it because it would take more time. I took off about 2mm of sand casting from the inner runners and TB.
Before the polishing started
_______________________
After the 1st attack
something is missing -
I will see if I get the time to port it and then re-polish, but if not it's all good I just want my baby back up and running
I have plans in the future for ITB setup so I'm not tooo worried 
Started my car up last thursday and noticed a high revving engine all of a sudden, it was like I was on the accelerator till 6500RPM ( my neighbourhood hates me already )
Primary diagnosis was intake manifold gasket was leaking, vacuum loss and the ECU is trying to compensate by dumping more fuel.
Bought a intake manifold gasket and started to dis-assemble with my Mechanic at my house on saturday.
the gasket was the last of my problems. It seemed that the intake air bypass assembly bolt snapped off and the IAB butterfly broke in half ( this is the same type of air intake bypass a GSR or Type R has - opens at 4100RPM for more power and air flow )
I'm lucky it did not end up in the engine
I decided to open the assembly and leave it fully open. I will lose some low end torque by doing so, but just to find this assembly is a real task. Honda wants 491$. Scrappers want to sell me the whole engine for 700-1000$ because without this part the engine does not run. Could not find a blown V6 engine in ontario or quebec.
well because I had to take all of the intake out I decided to do a mild polishing job. Not going to port it because it would take more time. I took off about 2mm of sand casting from the inner runners and TB.
Before the polishing started
_______________________
After the 1st attack
something is missing -
I will see if I get the time to port it and then re-polish, but if not it's all good I just want my baby back up and running
I have plans in the future for ITB setup so I'm not tooo worried