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]

Remove the other two screws and pull out the actual advance plates...the plates that your points are attached to.

Be careful not to break the ground strap between the two plates.

Pull them out, pull off the little clip on the side.
There is a single ball bearing in there that could fly across the floor....so go slow.

Open them up and see the sludge....
That is why they don't move well when it gets hot.

Clean and re grease that setup and out it back in place.

Your car will run fine without the vacuum advance. That is there to being on the advance a little earlier, but eventually the rotating for extends the advance plates anyways to full advance.