try this link http://www.geocities.com/toyotashawn/bizzareidle.html
You don't, fix the vacuum leak that's causing the eratic idle conditions
There can be a couple of reasons for your idle being eratic. one of which might be the carb. try cleaning it with carb and choke cleaner. if that doesnt do anything check all of your fuel lines lots of times there might be a small plug which would be slowing the fuel and not letting as much get to the carb. also check your fuel mixture screw.
when engine is first started cold it will have a eratic idle till it warms up some this is my experiance
Check Rubber Inlet Hose from air filter for cracks (need to wip it off to properly check-----as for slow pulling away,if the brakes arn't binding check spark plugs..
If this happened all at once, check the vacuum lines. A cracked or broken line will cause high or rough idle.
it mounted on the throttle body
If its the fuel injection model sounds like idle air control valve need cleaned out.
This is a very common fault on these cars (i've had 5). Two of the most common causes of which are 1. A dirty idle control valve - Find, remove, clean and reinsert it. 2. broken Lambda sensor - replace original
It was the dis ignition module changed it out and runs great!!
The idle air control valve is located in the throttle body assembly itself. It is a straightforward replacement part that runs roughly $200 at the dealer. This part may cause driveability issues including idle surge, check engine light, poor deceleration and eratic shifting.
I would say a vacumn leak. Check hoses, measure vacumn with running at idle and at idle when brakes applied. This assumes you have power brakes and it idles well without the brakes applied. Please make sure that the clutch is working properly... Does your clutch work properly?
The power brake vacuum booster is probably failing.