need help.02 4.7 code po442 medium evap leak,keeps coming up,check whole truck for vac leak nothing,had it smoke tested nothing,anyone ever come across this,if so please point me the right way.pulling my hair out.

 

not the medium leak but ive been getting the very small leak code three times already. taking it to the dealer next week.

 

If you have smoke test it and found nothing, Check your purge solenoid make sure it holds about 15hg of vaccum. If this is good check your gas cap more than likely the check valve is stuck and you will have to replace it. If you don't find anything else I would just replace the cap. This is a pretty common thing on Dodge.

 

thanks for the infor guys,put new gas cap on today have to see what happens,thanks again