Car loses all power , shuts down completely and then after trying numerous times restarts and runs fine
That can be the symptom of a bad Ignition Control Module, or also a bad crank position sensor. The ICM can be taken off and tested for free at any parts store. The crank sensor circuit can be tested on the car with a multi-meter. Also small motors (like a fuel pump motor) that are starting to fail can sometimes work until they get hot and then stop working until they cool down again.
Next time the car shuts down and won't restart, check for spark on a spark plug wire with the engine cranking over. If you have no spark, suspect the ignition control module or the crank position sensor. If you still have spark, but won't start, check if the fuel pump is putting gas up to the engine.
SOURCE: why would my car lose power while driving?
it could be a bad fuel filter or the fuel pump but check the fuel relay first
SOURCE: car starts run's 3 seconds shuts down
Your car is equipped with a system called PASSKEY standard on all GM cars and light trucks, try the following procedure to reset the system, the battery being dead will trigger the system.
PASSKEY LOCKOUT RESET GM CARS 1999 UP
1) Put the key in the ignition and turn to the "ON" position. Leave it that way for 10 minutes. After 10 minutes turn the key and take it out. Repeat this process (2) more times (3 times, 30 minutes total) This should reset the passlock system to recognize your key.
SOURCE: 2005 Pontiac Sunfire is missing and lack the power (it wants to gain power but powers down (jumps)
I suspect you needto relace your coil pack. You are probably not running on all 4. the engine will run but only on 2 cylinders.
If missing replace coil pack. they go regularily on the 03/05 F style engines. You should be able to locate a good used one at a wreckers.
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