Have a 1993 Ford Probe GT, 246,000 mi. Has started draining the battery, (would normally indicate alternator
), but in addition, the idle will suddenly run up to 2500-3000 rpm. Sometimes it will stay there, often it will jump up and down. When it idles normally, the Check Engine
light is on, and the Electrical Guage reads low, and the lights all dim. When the idle shoots up, the Check Engine light goes off, and the Electrical Guage reads about normal, and the lights are all normal brightness; it will also sputter and lurch. If it happens to stall (which is easy to do when the idle is high and you try to start out from a red light), it is often very hard to start (similar to vapor lock) if in fact the battery isn't drained. Unless the ground terminal from the battery is disconnected, the battery will discharge overnight or sooner. Fuel consumption is also way up, around 12-16 mpg instead of the usual 23 mpg. While the vehicle is fairly high mileage
, it normally pretty runs quite good and reliable, and has been pretty trouble-free throughout it's life (I am the only owner). This is my baby, and I have 2 other '93 GT's. This one and one of the others will be fixed up real nice with good eng/trans for my boys in the next couple years. In the meantime, this problem with this one is somewhat perplexing, this is the worst problem this car has ever had. It's still driveable, but you can't go real far, and you best carry an extra battery, and slink down in your seat when you're sitting at a red light and the engine's revving at 3000 rpm! Please feel free to ask any questions that you feel may help. Thanks.