02 blazer Zr2, stock , it seems that everytime i get on highway with a little harder acceleration than usual the ses light comes on . dont know what code it reads due to it goes off in the next day or so . i have looked at vacume lines ( no cracks or splits that i can see ) , new air filter, as best i can tell all electronics are hooked up correctly . same gas , gauges show no change. new fuel filter? dont know what else to check! ideas thoughts ,suggestions, are appreciated

 

check the the lines at the gas tank. i have had those being a little loose throw a code but only under hard acceleration

 

Maybe check the code(s) before they disappear?

 

Having the CEL go out doesn't mean the codes "disappear". The codes will still be present in the history. Codes can be cleared using a scan tool or by disconnecting the battery for ~10 minutes. The code may be a P030x code which you can read about in the OBD2 code index, but confirm the code first.

 

thanks i will check the above listed items thanks