D-jet troubleshooting, Only one item left on my list! Options

[saigon71]

My 1974 2.0 D-jet is running very strong, but there were two lingering issues with the FI that I wanted to address over the winter:

1. A severe idle "hunt." The engine would rush up to about 1200 RPM, then nearly stall...repeat cycle.

2. Every once in a while the car would buck, most notably at highway speeds...it wasn't bad, just annoying.

Last week I installed a new circuit board in the TPS purchased from Dave Sprinkle a few years back. It was calibrated according to the Pelican tech article using an ohmmeter.

I took a 210 mile road trip over the weekend to test things out. The car now idles perfectly through the entire warm-up sequence. Thanks Dave! (IMG:style_emoticons/default/beerchug.gif)

The problem is that I still have the same bucking issue. All my research points to the TPS. Any suggestions on what to check next?

[r_towle]

Was at moms today.

You found it....
I use whatever cleaner I have laying around...anything to get rid of the grease.
Re grease it with wheel bearing grease, making sure to glob a bit on the ball...and lightly coat the two pieces.

Hopefully you will have felt a difference when in your hand trying to move them before and after you did the cleaning.

With the weak power that vacuum advance canister applies, and sticky old grease, and loads of heat...they don't always retard from partial advance...which causes the high idle, and all sorts of other weird behavior..

It may not solve everything, but at least you know you have done that, it's good for another 40 years....and the rest of the tuning is not that.

Rich