Pulling the plenum / IH Some pics !!

[5ABI VT]

Thought I would just make a thread here with some pics. Will be sending the plenum and IH out for porting and a re-tune for the chip. Will be removing the secondaries as well as having the coolant plugged for the plenum/TB.

I just went over a few old threads and posts and theres a ton of info on this site so figuring things out should be pretty easy. One thing I wanted to say was I have a noticeable amount of oil in the plenum.. Ill take better pics in the light tomorrow.

pics for my own reference if needed..




Parts starting to pile up

Had to loosen this fuel.. connection? to get to this bolt. I also removed the fuel rail cap and tried to relieve pressure... there was no fuel to come out at all. bad thing?

Getting there..


Noticeable amount pooled up at the back. Will be installing catch can(s) before reassembly. Will take some pics in daylight tomorrow.

[5ABI VT]

Oil in the plenum..

[5ABI VT]

Not sure if I read anything about it when removing the secondary vacuum system.. there was a connection to the bottom of the plenum. Does this need to be plugged or .. ?

[XfireZ51]

You have a 94. Are you talking about the Differential Pressure Sensor under the plenum?

[tf95ZR1]

VERY CLEAN!
Engine & workbench
Who's doing your porting?
I also had a puddle of oil in my airhorn.

[PhillipsLT5]

Originally Posted by tf95ZR1

VERY CLEAN!
Engine & workbench
Who's doing your porting?
I also had a puddle of oil in my airhorn.

I know, you better start cleaning, LOL
Really, Very Nice!

[mike100]

about par for the course on the plenum oil.

[5ABI VT]

Originally Posted by XfireZ51

You have a 94. Are you talking about the Differential Pressure Sensor under the plenum?

That sounds like it. Is it for the secondary vaccum ?

I'm having Pete do the port work.

Thx I just finished painting this half of the garage and putting up the cabinets and work benches up/together along with the lighting. It's why it took so long to start the pull and it feels so nice to have a better place to work

I didn't have any oil in the air horn maybe just faint residue. The one grommet on the passenger side wasn't fully seated inside the injector housing and not sure if a slight leak would affect much .

Hoping to pull the injector housings tonight !

[XfireZ51]

Originally Posted by 5ABI VT

That sounds like it. Is it for the secondary vaccum ?

I'm having Pete do the port work.

Thx I just finished painting this half of the garage and putting up the cabinets and work benches up/together along with the lighting. It's why it took so long to start the pull and it feels so nice to have a better place to work

I didn't have any oil in the air horn maybe just faint residue. The one grommet on the passenger side wasn't fully seated inside the injector housing and not sure if a slight leak would affect much .

Hoping to pull the injector housings tonight !

Yes. Its the Differential MAP sensor. Tells the ECM there's enough pressure differential for the secondaries to activate. Once the secondaries are un-installed, Pete will make the necessary calibration change bypassing it.
That sensor is located under the ECM in earlier model years.

[5ABI VT]

Originally Posted by XfireZ51

Yes. Its the Differential MAP sensor. Tells the ECM there's enough pressure differential for the secondaries to activate. Once the secondaries are un-installed, Pete will make the necessary calibration change bypassing it.
That sensor is located under the ECM in earlier model years.

Makes sense now thanks !

This is what my VW needs lol!