reading code 136 because the catalytic converter is going out?

Can you upload an image of the port in question? Also did you replace the catalytic converters as well? If not, this is your problem, the catalytic converters will not get better after the EGR replacement.

The catalytic converter hasn't been replaced. The code 136 says it's to lean. i know the catalytic converter is going bad because of the sound it makes. But the EGR valve is still reading code 332 insufficient flow, even after being changed. It hasn't improved the performance of the motor, so I'm stumped. I'm convinced this is why the catalytic converter is going bad. That nipple coming off the main line didn't have anything attached to it upon removal.

That port goes to the EGR pressure feedback sensor which will give you the EGR flow code. The Pressure Feedback EGR (PFE) Sensor is located at center rear of engine, near RH side of intake manifold. Please make sure the EGR valve ports are clear and free from carbon. Check out the images (below). Please let us know how it goes.

Thanks, Ken I found the port. I'm going to get it buttoned up and then I'll get back to you.

Pic of port underneath vacuum solenoid.

That could be an open air vent which is no to have anything on it. When the engine is running does it have vacuum?

That was the issue with my EGR valve. I bought a foot of hose from part store and code instantly disappeared.

Thanks for letting us know, we are here to help, please use 2CarPros anytime.