System Randomly Shuts Down/ Engine Dies

[Tony N]

I have a 2001 Suburban that randomly dies (while idling, while parked in a parking lot, WHILE DRIVING DOWN THE HIGHWAY) without throwing a code. It will start right back up and not die for the rest of the day. It almost always happens (99% of the time) when the outside air temp is 90 and above. The hotter it is outside, the greater the likelihood of it dying. The crankshaft sensor has been replaced right after it started happening, but at the time it did throw the code for that issue. After that, it never threw a code for that problem or any other problem. This has been going on for several summers.

 

What is the likelihood that this is a computer going bad?

 

Tony N

[redjewel2ss]

sounds to me something is up with either the air, fuel, or ignition systems. do some routine checks for problems.

 

check your throttle body, make sure the blades are not dirty or opening too much at idle.

check the spark plugs for any signs of not running properly, check the wires for loose connections or corrosion.

check the fuel injectors for any gunk build up

check the fuel pressure on the fuel rail to see if the pump is working good.

 

until you pinpoint all these areas, it could be anything.