ok
91 navajo 4.0 ohv 118000 miles
I have been chasing a rough idle drives ok but idle is real rough I have replaced the following
Iac,maf,css,ect,tps,ats. Plugs wires, new heads and all gaskets,timing chain kit,harmonic ballancer, still rough idle . Compession was 160 to 165 all cylinders ...