2002 Pontiac Sunfire shuts off by its self. Has only done it a couple times. Starts right back up and works fine. Any ideas?

are you sure it jumped time?? look at all your other questions,maybe you will figure out it is worth more to a scrap yard

I would guess you have to go back over your work
with regards to the timing chain & cam gear settings
If your at a professional shop, they can look at various data,
to get an idea if timing is an issue since that work was just
done

Once a ****** starts to slip it is done and needs to be removed and rebuilt.

have you checked your fuel pump and relays for fuel system? AND , have you had the obd codes run yet? That sounds like the places to start_fuel system/delivery. Oxygen sensorswould be my next shot. maybe one wasnt replaced or came loose during new cat install. have them double chk that for you.

have you checked your timing?sometimes it jumps.

Turn the signal light on to the right and probe the contacts in the bulb socket with a test light to see if the power is there,your test light should blink,the other contact in the socket is the parking lights and tail light.
if no power at contacts probe the wire it's self where it enters the socket for power.if you have it there the socket is faulty.

Have somebody listen at the gas cap for a buzzing sound when the ignition switch is turned on, or if you can hear it, it only does it for a few seconds, if you don't hear it, the pump is bad and the gas tank has to be dropped to change it.
This is not recomended, but I do it all the time to make sure the problem is in the fuel system. Spray a little bit of starting fluid in the intake, if it starts, the problem is in the fuel system, but listen for the buzz sound first.
Other problem could be a clogged fuel filter, or a faulty fuel pressure regulator. Have a fuel pressure test done, that would also reveal the problem, if it's a fuel problem.

Try spraying wd 40 on the pivot points then work it in!

try disconnecting the battery for30 min befor you reset with the key on.

hi..the transaxle converter clutch . tcc. uses a solenoid -operated valve located in the automatic transaxle to mechanically couple the engine flywheel to the output shaft of the transmission through the torque converter.that reduces the slippage loss in the converter.reducing emissions.but check the vss first.which is called the vehicle speed sensor.they both work together .if the vss is not working right it wont call on the tcc.
check this out..
thank u..
rate me..