Throttle valve R&R, 1.7 liter et al Options

[r3dplanet]

So I decided to pull the throttle body (valve) from my car in order to rebuild it. The throttle valve had a tendency to leak and stick. It was also moderately dirty. At the time I was on a personal mission to pull and restore every major component of the D-Jet system. Since then, I've performed similar operations on the MPS, AAR, etc. Perhaps I'll document those operations in a similar way.

My car is a 1971, but the engine is a 1973. I know that other engines use a top-mounted throttle valve, but it's actually quite similar to the side-mounted units like mine.

I realize that this isn't superorbital propulsion engineering, but it might be helpful to somebody.

Here's the original setup. You can clearly see the part number 022 133 067 under the muck, along with various scratches and nasties.







In this photo you can see that there's quite a gap around the brass air valve and inner diameter of the main bore. It seals if the valve is fully closed, but even the smallest relief of the lever allows air to pass.

[r3dplanet]

While I was in there, I took the time to remove the throttle position switch circuit board and install a new replacement. Mine looked awful. But that's a subject for another post.

Note that when I reattached the TPS, I still had to contend with one broken plastic tab. Thankfully only one. I used a bit of hot glue to secure it. Then I pulled out the multimeter and adjusted the TPS thanks to the famous Pelican article and diagram found here:

http://www.pelicanparts.com/techarticles/9...brate_17-18.jpg





Joy:



Overall, I found that by performing this little R&R session I managed to get the car free of a non-obvious and troublesome vacuum leak. Hopefully it will help someone else also.

Thanks for reading,
Marcus