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I have experienced this myself. try turning off the ac controls because there is a function in the cycle of the ac system that raises the engine idle to run the ac compressor.as long as its on, the engine idle is raised slightly, and higher when warmed up. also, if you tap the gas momentarily it may "kick down" but takes a few seconds to slow down..now if this doesnt work, try this trick..you can remove the negative battery cable with the key in the "run" position,(motor not running), then shut the key off and re-connect the battery.. turn the key on for a few seconds...(this resets the factory presets in the on board computer and the issue may be resolved) also there is a manual reset idle screw located on the back of the t.b.i. unit that controls the basic idle speed. mine is a nut over a slotted stud that gets turned to make the adjustment with a screwdriver and once done locked back by the nut. gotta remove the aircleaner housing to see it behind where the accelerator cables hook up to the tbi unit...good luck hope your not confused by all this...my car has over 300000 miles on it..the original engine and been rebuilt totally at least twice..3 head gaskets, 4 timing belts, and on its second gas tank.pump went bad in the first one, and changing the tank was cheaper than doing the pump alone.right now my issue is that my key part of the ignition fell out of my steering column so I am left starting the car with a screwdriver(what fun!!!) and my speedometer dont work because the sensor went bad and the cruise dont work either as a result. gotta spend a day at the junkyard for parts to fix it..part of the fun of older cars....good luck..jerome
You most likely have an AC compressor that is cycling on and off to often, this causes the RPMs at idle to fluctuate. The rapid cycling of the AC compressor is caused by a low AC system charge of refrigerant due to a leak in most likely the compressor shaft seal. Please have an AC repair ship confirm this educated guess..
Sounds like the kick down cable is not working properly. The kick down cable is the cable that tells the transmission to down shift depending on the throttle position. If the cable fails then when the car is turned off and restarted it is in too high of a gear to go and bogs the engine till it dies. Check this out and see if this doesn't get you back in business. Hope this helps. Good luck. cj2176.
With the ac, sounds like you definitely have a short with the ac electrical wires. Have a mechanic check that out. 2. The wiring for the dashboard gauges may have tears or something is causing high resistance in them or you may need a new dashboard itself. Have that checked too.
As far as the brakes when you trying to change gears, what do you mean brake lock wont open? Finally with the RPM, I dont think your dashboard gauge is working correctly so you may need that replaced also.