Stalls out sometimes

I have a 99 pontiac montaina V 6 when I put it in reverse it wants to stall out and it does and it soometimes want to do the samething in drive have checked the vacums and they are alright and put in a new fule censuer and punp but still have the problem it also revs up and wants to jump at stop lights.

I hope you can help with this one. I recently replaced all 3 ignition coils in my 1999 Pontiac Montana. About a month later it started acting like it was gonna stall. Then one day I turned the corner and car stalled. I could get it to turn over but it wouldn't start. Eventually some guys came over and got it started and I made it home a few block away. After that I left it parked and drove it a few blocks a couple days later. It would still hesitate, mailnly when I pressed the breaks. My brother in law replaced 3 of 6 spark plugs because that all he could reach. Now when I turn my car on the engine light flashes and when I put my car in any gear it stalls/ shuts off. Does this have anything to do with replacing the ignition coils? I also know I need a tune-up, Any ideas? Thanks!

My 2000 Montana just had the fuel pump replaced, we just got it back yesterday and it keeps stalling out. It has about 215000 kms its is a V6. What can the problem be?

My 2001 does the same thimg it turn out to be a egr valve sticking open my would work fine and then stop at lights stall but starts fine again and while taking off it would cut out and backfire

Why does my pontiac montana stall right after I start the van?

Other Category problem
2000 Pontiac Montana 6 cyl Wheel Drive Type unknown Automatic 120000 miles

when you shut off the car my antifreese pours out and im going through about 1 gallon every week or so.

It's driving just fine but we noticed that when it starts to get low the heater quits working, it pour out close to the front of the motor

When I shut it off is when it happens