Ok Knock sensor fixed, and EVAP Canister Purge Volume Valve fixed. Now i can't get everything to run smooth. Its lacking in power, and in the morning or starting after not driving for awhile, when in DRIVE it runs really rough. Almost like it is misfiring, but it tested all the packs, and replaced the plugs and cleaned the injectors and fuel filter. Also again between 60-70 it runs rough. I have noticed a hesitation in shifting as well recently.

I'm trying to sell this so i want to get it up to snuff. Any suggestions.

96 GLE - 136K

 

Replace the PCV, Clean the IACV, could also be dirty fuel injectors. Those are the first things to check.