Discussion Starter · #1 ·
93 AWD with the Vortec 4.3, i just got it and it stumbles badly, i replaced plugs, and dist. cap and rotor button along with the fuel filter. Doing all at once helped some and made it easier to start. I haven't checked fuel pressure yet though to rule out the pump being weak. But it is hard to start, runs rich as hell (exhaust smells more like gas then exhaust), has poor power most of the time. Although if i floor it from a stop it bogs to about 20mph then takes off running pretty good, almost like normal. But sometimes sputters/cuts out. Just not all the time. if i give about 1/5 to 1/2 throttle it goes OK, but not like it should. Like a really bad miss almost. I think it would be the cpi injector is bad or that the cat is very clogged. But if i leave it sit overnight it starts easier, like an injector is leaking and the extra fuel in the cylinders helps it start. I didn't replace the plug wires but i plan on it tomorrow or Monday so I'll see if that helps any. And i almost forgot.. is it possible with a normal distributor system for one side of the motor not to have fire? I pulled a couple plug wires to the driver's side bank off the distributor and it runs about the same with them off.. So could i have just bad plug wires, or maybe something worse like a bad head or head gasket on that side causing no compression? I know i put alot of info, but i'm just trying to get this pig running right before snow fall.