2000 Chevy blazer LS 2 door 4x4 Vin w. I have replaced MAF ,vacuum lines, cap and rotor, plugs and wires, pcv, ignition coil, fuel filter, cleaned egr and throttle body, checked for leaks around tb housing, vacuum is good, fuel pressure good, and the CEL is not on. I've also replaced air filter. Blazer runs great on hwy but when I stop it idles rough up and down and occasionally dies which is not often. When I unplug MAF it holds steady idle. Any suggestions greatly appreciated.

 

you can try cleaning the maf. just buy some maf cleaner at autozone and hose out the inside. its amazing what that can do sometimes