First time poster here so here goes.

I just replaced my pressure regulator on my 99 chevy suburban. I was having issues starting it and would have to crank it with the peddle to the floor to start it. I got it replaced and everything put back together. Went and turned it and it started up after a bit. Then turned it off and tried again and it started right up! Success I thought. A few days later I went out and tried to start it cold and it started right up. I hadn’t actually driven it get. When I did it was no go. It starts fine but when I press the peddle down the Rpms drop. If I start it and leave it running, after about 10 seconds the idle starts dropping till it dies. After it dies it starts back up fine but the gas pedel doesn’t increase the rpms. looking for some advice on where to start. I thought it might be the MAP seal which was old and a little damaged when I put it back into the manifold but I replaced it and there was no change. I’m thinking there might be a vacuum issue or air/fule mixture issue. Any help or advice would be great. I’m going to post a video of the issue to help better show what’s going on.

 

Did you bleed all the air out of the system?

 

Yep, use the test port on the rail to bleed the air and I bet you'll be fine.

 

I did bleed the line, only gas came out. Here is a link to the videos (for some reason I can't upload them.

https://drive.google.com/drive/folde...uD?usp=sharing

any other ideas?

 

When in doubt with fuel issue, replace the filter first.

 

 

Have you checked the fuel pressure?

 

 

with a fuel pressure tester

 

You need to put a guage on it. Most auto parts stores will loan one. I forget what the specs are for a vortec, but they require alot more pressure than a tbi or carb.