I have a 95 sarari 4.3L W cmfi
Started to run rough,and black exhaust, so i thought i would try to fix myself.
I have changed Oxy sencer,Map sencer,EGR valve,air cleaner,pcv,
plugs,wires,distributer cap,rotor,and coil.
When i changed plugs,all on drivers side 1-3-5 were light brown ash color.
On the pass side 2-4-6 were all dry black soot .
Still runs badly,black exhaust ,and also can smell gas.
I was told it may be the spider injector.
What i can't understand is why all plugs on drivers side are good ,and all on pass side are dry black soot ?
I am going to take a compression on all cyl today,and will post back.