Help needed
 

Alright so heres the deal I have a 98 Chevy Blazer 4x4 4.3L engine
and I've been working on this car for about 4 months and I've gotten everything fixed on it but one thing and I can't figure out how to fix it, my last resort would be taking it into the shop but I dont want to do that unless theres somin I can do

So it will drive fine for a couple minutes then the airbag light will come on and the engine will start chugging like its wanting to die

the only work I've done under the hood was replacing a intake gasket

also the previous owner did hit the front right of it on a gaurd rail

If some one could help me out with this problem that'd be awsome! thankyou

Ok, what have you gotten fixed on it?

Any check engine lights? If so, what are the codes?

Anything else you can tell us? Will it actually stall out, or just run rough? Will it idle ok, or is that rough, too?