Stall when I put in Park - what could cause that?

[RobClark]

This one has me beat.

- Starts 1st time every time
- Idles fine
- Drive away. Never a problem.
- Come home. (Engine up to normal temp)
- Idles fine in the driveway while in gear. (Fine = steady, smooth at the right revs ~ 800 ??)
- Aircon on or off revs stay the same (so it is compensating for the load changes)
- Move gear lever to Park or Neutral ... stalls 8 times out of 10.

I have:
- removed the idle speed motor (air bypass) on the side of throttle body and cleaned it out. Was pretty clean. Cleaned again with carby cleaner spray.
- checked the electrical connection is OK to the idle speed motor (CONNECTOR OFF = car won't start. ON = as above)

Ideas team?

Car:
302 EFI '86 Town Car

Rob The Aussie

[gabegt90]

I was going to say iac but I guess not

[FastGallopingPonies]

My car did that cause of the IAC aswell. If I put it in park or something the car would go to stall if I gave it a bit of gas it would stay running smooth. I also cleaned mine and it was pretty clean but I ended up getting a new one and it fixed the problem.

[gadget73]

I would say maybe the emergency brake release on the shifter column. Not sure if yours still has it, but if it did, you'll find a white plastic half-moon shaped item on the steering column right up against the firewall. This would be inside the car. There are two vacuum hoses hooked to it. One is a vacuum source from the engine, the other goes out to a vacuum motor on the parking brake assembly. I'd pull and plug the engine line and see if that fixes it. Its common for those valves to start leaking.

[89GrandMarquis]

On my E150 (302 with AOD) van, if I have the throttle pressure set wrong (too high), it will die when I shift into a gear.

If I adjust the throttle valve in the "correct" location, it shifts too late for my taste during heavy loads. So, it is now a adjusted a little more than it should, and dies only every once in a while.

You could temporarily remove the throttle valve cable and try it.

[Archangel]

On my E150 (302 with AOD) van, if I have the throttle pressure set wrong (too high), it will die when I shift into a gear.

If I adjust the throttle valve in the "correct" location, it shifts too late for my taste during heavy loads. So, it is now a adjusted a little more than it should, and dies only every once in a while.

That's not normal, not at all - I've had my TV cable adjusted to the max pressure (a notch further would rip a cable off at WOT), never had any problems except for under light to moderate throttle tranny would never go into OD before I hit like 75mph.