Car runs fine but you can shut the ignition off but the car continues to run. I have to drive it around to keep it from overheating and after 1/2 hour or so it may or may not shut off. Sometimes longer sometimes less.
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It sounds as if your Ignition switch is damaged, or, you have a bad relay that is sticking. To check the Ign. Switch, remove the covers on the steering column to gain access to the switch, unplug it and the engine should stop, when it's running. If it's just cranking, it should stop when you unplug the switch. If it does, then the switch is the problem. The relays you'll have to troubleshoot individually with a test light.
If only the starter continues to crank after shutting down, then you need to test the solenoid on the starter as well as the starter relays and the Ign. switch to determine which is causing the current to continue to the starter.
The check engine light should be on and when it is the engine controls are in Limp mode. That means the computer is using a pre-set list of settings to try to keep the engine running long enough to get the car to a shop. You need to get the problem with the MAP sensor fixed and get the light turned off.
This sounds like the ignition switch is sticking/hanging & allowing the engine to continue to run. When you put the fuse back in, do the ignition lights come on, if so, then that should definitly be the problem.
You can try to wiggle the key from on to off several times when you shut it off to do further testing & you may see that it will shut off that way. More proof it's the switch.
you have a bad fuel pump it's in the tank and only comes on in these conditions.
1. ignition switch turned to the run position turns on for two seconds.
2. same as above but when engine starts pump continues to run as long as engine runs. and the safety switch for blow out prevention has not been tripped.
Your problem is the fuel pump and fuel sock and the check valve in the pump. only one way to be sure and that's pressure testing. You hook up gage to fuel rail turn the ignition key to the run position look at pressure should read 40 to 50 psi and should hold for 1 minute, if you drop 5 pounds in one minute pump is bad and even if it started they could verify that the check valve is not holding pressure.
This is caused by the life of the pump by using gas with ethonal in it and your car was not designed for it, so it damages the pump and injectors and destroys the filter in the pump.
YOUR ENGINE IS RUNNING HOT.IF FAN KEEP RUNNING WHEN ENGINE IS OFF.CHECK COOLANT MAKE SURE ITS NOT LOW. REPLACE THE THERMOSTAT AND RADIATOR PRESSURE CAP.YOUR RADIATOR CORE COULD BE BLOCKED AND THE RESTRICTED GRILLE FULL OF BEBRIS AND THE.ENGINE BLOCK COOLANT PASSAGES COULD BE BLOCKED OR IGNITION TIMING COULD BE OFF.ALL THESE PROBLEMS CAN CAUSE YOUR ENGINE TO OVER HEAT.
You need an alternator....well unless your belt came off or got very loose. The truck continued to drive because the battery had enough juice left to run the ignition system, but after you shut it off there was no where near enough to turn the engine over or possibly even run the starter. The battery will have to be charged and a new alternator installed. Hope this helps.