When you replaced the distributor was the timing set? Or the camshaft retard? Have you cleaned the MAF sensor or the EGR valve?

 

I had the distributor installed by a shop, and they did set the timing according to GM's specified procedures. I'm pretty sure the entire Blazer is retarded, but I don't know about the camshaft.

I replaced the MAF sensor a little over a year ago and cleaned it thoroughly when I installed it (it was used). In that time I've probably only put about 15,000 miles on it. Would the MAF need to be cleaned that often? It also has a clean air filter that was installed about that same time.

As for the EGR, where is it?

 

If your Jimmy is 2gn syle it will be on the front of the engine next to your thermostat housing.You can miss it.Its very big and sticks out like a sore thumb.Theres 2 bolts holding it in place.It will have a harness plaug in right in the top of it.

 

I didn't see a vacuum line plugged into it (unless its in the harness), but I did press down on the harness to make sure it was plugged in last night.

Afterwards, I started it up to head home from work. Everything suddenly cut out; interior lights, engine, everything. The engine kicked back in, and it all came back without having to restart. It was almost like the Blazer rebooted. Then at the gas station today, I had to hit the gas pedal to get it to start back.

Final solution? I went to a car lot today and traded in for a 2003 Trailblazer. I do appreciate everyone who offered up their advice though!

 

Now we'll never know what it was. : (

 

If I couldn't find it after throwing about $600 ($200 distributor replacement, $200 catalytic converter, $150 O2 sensors, fuel filter and two sets of spark plugs, etc.) with absolutely no results, I decided I was done throwing money at it. My topic ran kind of slow, so I think I stumped quite a few more experienced mechanics as well.

With the next solution amounting to doubling my O2 sensor cost by buying another pair JUST because of the brand name, it seemed to be a good time to move on and let a car lot figure it out.

The result of my vacuum leak repair led to no results in the original problem, but the 4x4 was able to lock in for a grand total of ONE DAY out of the three years I've owned it. After being stuck in the snow on Christmas Day, looking back I believe I'm a lot better off with it out of my driveway.

 

Lol, that and the fact that this is probably one of the slowest car forums I've ever been on. Thinking about starting a few different accounts with GMC forums to get faster help. Over at the BMW forums I'm at you get responses within 3-4 hours.

Then again, those guys are nuts about their bimmers. Glad you got something more reliable though.