I have a SES light that is showing me code 26 (evap purge circuit)

I have researched and found out ho wthe evap purge ckt works but am not sure how to fix this.

I have replaced the purge solenoid, verified all vacuum lines and purge lines going back to the charcoal canister in the rear tire well.

what else is there to try, i fear my quad driver may be blown on my pcm which means a new PCM but i dont wanna drop the dough if it ain a sure fix.

any way to test the charcoal canister (what do you check )

any explanations will help.

this i a 93 OBD-1 car

 

I had the same problem, check your air pump fuse. Mine was blown, fixed the problem and SES went away for 77cents.