i have a 96 blazer with 170k on it and it has a miss going uphill at low rpm get in the throttle it quits aslo the exhaust smells rich any ideas

 

Bad sparkplug wire?

 

Replace your plugs with AC Delco or NGK, only.
is your servise engine lite on?

Lay the old ones out, LABELED so you know which came from where, in order and take a picture of them and post it.

DRiver side is 1-3-5, pass 2-4-6

 

got new ngk platinum plugs in it new wires and properly gapped the plugs Im getting charcoal up to the sensor on the evap line and it completely clogs the sensor and the elbow where it goes into the sensor could this be related. there's no engine light on ever. i have a scan tool but never pluged it up for that reason

 

I guess I should explain.. Before there was O2 sensors and computers, the best diagnostic tool for your type of problem was reading the plugs.

It still is.
Make sure the lighting is right so we can see detail on the business end.

Also just because you have new plug wires doesnt mean they are good. Cheap ones often fail right out of box. Ac Delco is best bet.
Some fail at load, some fail to spark at cruise.

You need to fix that vent line problem and get a new canister but I doubt that's the problem, here.