Ford 1994 Explorer. After 20-30 minutes of driving in Tucson Hot Weather (104-109 degrees) the truck check engine lights goes on and shortly after it will shut down. Spark plugs will not fire up and engine turns off. For the next 15-20 minutes the enginer will turn over but does not fire up. After 20 mintues of non operation the Truck will start up fine and continue working fine. I think it might be the crank shaft position sensor, but when I run the OBD I scanner on the engine no error codes come up for the Crank Shaft sensor. What does come up is an error code for the EGR? help...
Yes the egr could be clogged or loosing vaccum check the valve by taking it out or looking to see if the pickup tube on the valve is bad or has a pin hole in it.
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