gsiefer- I had this problem. I replaced every sensor, even rebuilt the engine -mostly because it had 221K miles on it. 3800's are made to run 200K. But that's about it. The gaskets become junk on upper engine. With Proper oil changes the lower end will last. The problem was the computer. It had a short internally. I found a new computer on eBay and it runs like new.
There are a few reasons why a Pontiac 3.4 liter engine may die while driving. The battery cables may of come undone, a spark plug may need changed, or the fuel pump could of stopped working.
Loose battery cable much?
the battery is dead and needs to be charged or replaced, or it could also be the alternator is going bad
the battery is flat or its to old
Check the starter relay that is just behind the battery. The positive wire from the battery goes to it.
Turning the lights on put a load on the alternator causing the idle speed to drop. I would have the battery and charging system tested to make sure everything is okay. The battery may be on its way out.
The concentration gradient is the driving force.
Your battery is weak, or your your alternator is not charging battery.
Yes why not, you can recharge your truck PC by driving around. To recharge the PC first the truck battery should be charged. Driving recharges truck battery because every truck has a power generator inside it but you cannot recharge your truck battery if it is not working properly the acid level of the battery should be maintained properly. Better you check your battery before recharging battery.
If your 1994 Pontiac Trans Am randomly stalls out while driving, you may have clogged fuel injectors or a bad distributor. Check the distributor first, as this is the easiest to replace.
Alternator is defective or battery has a dead cell.
check battery cables at battery may be lose.