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Worn spark plugs out of gap setting they can't maitain sparking from heat the electrodes move and there's to much air gap for ignition spark and the motor dies 5 mins. Later it starts right up like nothings wrong drive around slow at 25 mph and as soon as you raise up your speed engine stumbles and dies
Loss of power at highway speed is usually clogged fuel filter or clogged air filter. Checking fuel pressure won't tell you if the filter is clogging up. You can still have pressure, just no volume. Air filters can do the same, except it will usually die or stumble coming to stops. The abs and disable light won't affect the engine performance. Hopefully you have a bad wheel sensor that is also disabling the AWD. The sensor is around $100 the actuator for the AWD is over $300
Could be any number of different thing's . Have thrity years as automotive technician . Started in 1984 at first GM dealership - chevy . Dirty throttle plate , IAC air passages- probably not - wouldn't do it one time then not the next . TPS - throttle postion sensor - maybe .Sticking EGR valve Taking your vehicle to a qualified repair shop that has the proper diagnostic equipment an knowledge . Testing an not guessing is the way to a proper fix. 007 Idle Speed Problems Scan Data for Idle
Some makers used Vacuum releases for their emergency brakes which had a Vacuum switch connected to the shift assembly. This would account for a stumble if Vacuum vented out through this switch.
More common for shifting stumble to occur from Park to Drive, engaging a load on the engine, not to stumble to a freewheeling Park position. Sounds like idle speed control is sluggish to stabilize the motor.
You also have idle speed control problem with A/C, kind of shows that A/C was what kept the engine running because when you turned the A/C off, the car died.
I am going to give you some Websites for wiring diagrams. Alldatadiy.com amd Autozone.com with free wiring info upon registering your vehicle.
It seems that the base Idle speed control is not working and the A/C idle speed control is.
Also check for Vacuum leaks on the intake manifold by spraying water from a pumpbottle on the seams of the gaskets.
Check ignition Relay or ignition switch for random cutouts. The fusebox layout is on the Autozone site.
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