Just want to make sure, the regulator is located to the left of the fuel rail and the hose running to it is a very small hose correct? What does it tell you by me smelling gas in the hose? I did it with car not running.

Sounds like you have the correct hose, and yes, you check with the engine not running.

There is a rubber diaphragm inside the FPR that moves up and done with high and low vacuum, which in turn opens and closes a valve that regulates fuel flow. If that diaphragm develops a tear, gas is sucked directly into the vacuum hose and into the intake system. That is why you smell gas in the vacuum hose.

Replace the FPR.

Well I replaced the pressure regulator but I'm still stalling out after 3 to 5 minutes of idling. I don't smell gas on the vac hose so regulator was bad I'm assuming but not sure what to try next. Car starts out idling fine but rpms will eventually drop to about 500 and car will then stall out. Starts right back up. Idled car while increasing rpms but strange thing was I could not get rpms to go above 4000 as it would get close but kind of bounce back to around 3500 everytime I got close to 4000. I'm desperate and very frustrated but appreciate all the help that'* been offered and if anyone has more please let me know.

Getting suggestions ranging from maybe my throttle body needs a good cleaning, possibly bad gas and also that my map sensor could be bad based on the fact of not beng able to rev engine beyond 4000 rpm'*. Any thoughts on that.

Here is a procedure for testing the MAP sensor:
Part 1 -MAP Sensor Test. GM 2.4L Quad 4.

I am not sure where your rev limiter is programmed, but 4,000 RPM'* sounds about right. Not being able to rev above that in park or neutral is normal. You should be able to exceed that when driving the car.

Would the map sensor throw a code if going bad? I'm not able to do the test procedure for this, just asking before I head to garage. That'* if I can drive car there which I don't think I can. What'* your thoughts on the bad gas theory and throttle body cleaning. I have both Seafoam and Techron concentrated fuel system cleaner.

When the MAP Sensor goes BAD on your GM 2.4L Quad 4 equipped vehicle... you see one of the following Codes stored in your vehicles memory: P0106, P0107, or P108.

Bad gas? Did your problems have a sudden onset coincident with the last time you got gas? Do you use the same gas station all the time? What brand do you use?

I got gas in the morning and the car started acting up on way home but I think it had a slight stumble on the way in the morning. Here'* an udate from this evening. When I got home I added some seafoam to the gas tank. I started the car and it stalled like before after about 5 minutes. I started the car again and while it was idling I revved the engine a little here and there and the engine continued to run. I switched the a/c on and the car kept running. I noticed the engine cooling fans were running the whole time while the car was running. I took the car for a very short ride with no problems and parked it and let it run a little more. I would say it ran about 45 minutes without stalling. I shut car off and cooling fans also stopped. I started car again and ran for about another 15 minutes without cooling fans coming back on and the car stalled but after 15 minutes. I came back out about 2 hours later and started car and let run for about 15 minutes again revving it here and there. It never stalled out and I noticed what looked like a little more exhaust smoke coming from exhaust pipe. The car'* idle is still a little low when running but at least it stays running much much longer. Is it possible the fuel system cleaner added has anything to do with this.

Still hoping to find some help with this car'* issues. The car is up and running
but I'm having a strange problem. My son has driven the car for 6 straight days to and from school which is about a 22 mile, 35 minute drive. He has had no problems on the drive to school and the first 2 days no problems coming home. but the last 4 days the car has just shut off while driving. The first 2 times was before I switched out the aftermarket crank position sensor and the last 2 times were with the oem installed. The first 3 incidents were 20 to 30 minutes into the drive and todays happened twice. The first time about 7 minutes into the drive and the second incident was about 20 minutes later. Everytime the car starts right back up. Does anyone please have any suggestions as I'm not sure I want him to continue driving the car.