what is wrong with my car it keeps shutting off and idles really low.
codes reading
3,7,8...but i wanna know if there is a yet a bigger problem? why all three at the same time. whitch is really out? the light some times stays off. but them the car boggs and light comes on. I'm pist. please help.

 

Clear the CEL codes from the ECU and then drive the car to see if the CEL turns on again. If so, pull the codes again to see if all three or only some/one of the codes repeat.