All I can say is you have to try to narrow it down. The first cut is to determine whether it's losing fuel delivery, or spark. Intermittent problems are always the hardest to track down.

 

OK, so alternator and battery checked out OK. Cleaned and reattached recommended electrical connections. PCM looked great.

The manager of the place that checked out my alternator/battery said that, given the symptoms, it sounds like a fuel issue. Suggested testing the MAF, MAP, and fuel regulator.

Any other thoughts?

 

Have you run any injector cleaner through it? MAF sensor can cause issues, but I'd think it would give you a code. Fuel regulator usually means low idle, and sometimes dying at idle.

 

How old is the fuel filter.

Yes, MAF can cause problems. Try unplugging it and see what happens.

 

It's been a while since I've done any fuel injector cleaner. Is there a brand that's better than the rest?

It does idle a little rough - always has (almost like it's cam'd up). It will die @ idle, but it dies under load also.

Fuel filter was changed couple/three months ago, after it died on the side of the road and didn't restart the 2nd time (1st time I replaced fuel pump).

 

That is a quick test, do it before you start it. If it runs/idles better it is the maf. If so, I recommend cleaning it with a maf cleaner before replacing it.

 

OK, sorry for the long delay, but it's been one of those months...

Three or four weeks ago, I got the MAF cleaner, took it all apart, and sprayed the crap out of it - MAF, inside and outside of the hose, all connections and connectors. Voila, no more dying. Don't have a clue as to why there were no codes, but it's fixed.

Still idles rough, but it's more rhythmic like it's a 'sorta' bad plug/coil, or maybe a fuel regulator (however, if it's the fuel regulator, I wouldn't think it'd be this 'even' in pattern). It's not so rough that it's a totally bad plug/wire, more like it's just not got enough of whatever, fuel/spark, for it to do its thing.

Thanks SO MUCH for the recommendations. Now the wife is off my back 'cause she's not so wigged about getting stranded on the side of the road.

 

Does the check engine light come on a first? If not, you might check for a code, if it does, probably nothing is set, or after a few times of a misfire or such it will tell you. I might suggest if you can pull the spark plugs, look at them they will tell you alot.
Here is a guide to read them
NGK Spark Plugs USA

 

No codes, no nuthin' 'cept the rhythmic rough idle. Plugs are new - think one could be bad? It's not like there's no power @ all.

 

Haha, pull the plugs. That's a lot easier to say than it is to do.

You need to get it on a scanner so you can see exactly what the various sensors are seeing.