I have since Check Engine tested it, it came up as "Lean Exhaust" or something like that, said to check the ECM and the O2 Sensor. I replaced the PVC valve and ran a bottle of fuel treatment to clean out any water, and filled up with mid-grade gas. It seemed fine, just drove it for an hour, only sputtered once just after idling. Maybe this is all a case of bad gas? I am also going to check for any air leaks and other smaller things before I see about getting anymore expensive repairs
"Ronald Thompson" wrote
Check you do not have a vacuum leak somewhere. I had a crack > of one of > the lines near the distributor. It had hardened and split. > > Ron > > pumpkinhead wrote: > > Hello, > > > > 89,000 miles, 4.3 Vortec > > > > My Silverado has been stalling and missing over the past few > weeks. I > > have put new plugs/wires (twice, the plugs were burnt up > both times), > > distributor/rotor (just a few days ago), a fuel filter, and > adjusted > > the timing, yet the problem persists. What else can it be? > > > > Thanks, > > Jimmy > >