OK Guys & Gals, I need some assistance on this one. I have been "Freshning" my '89 SCHP for the past three years and finally turned the key on the rebuilt stock 306 this past weekend. It fired right up and upon initial warm up idled right down just like a new car. So long as the clutch is depressed everything is terrific. The engine check light did come on and stay on right after starting. I have not had a chance to get a code checker yet.
Now for the "RUB" - upon release of the clutch it will either die or immediately go to 2300 RPM running rough and stay there. "ALL" engine sensors are NOS. The exhaust is NOS Ford from the heads to the tip of the tail pipes. All harness are unmolested and are the original from this car ('89 5 speed configuration). Computer is an A-9L (swapped with another good A-9L and have the same exact problem).
I have replaced the clutch/starter safety switch (hooks to the clutch pedal swing arm) and the neutral switch (on the transmission) with no change to the problem.
If anyone has some good ideas as to what the problem might be it would be most appreciated.