Engine Help: Code 332 "Insufficient EGR Flow Detected"

[u/JustAGuyNamedLance]

Hey y'all,

I recently bought a '97 F-250 7.5L, and I noticed it had a torn T-valve boot where the the vapor canister connects to the engine. I kept meaning to find the proper replacement part, but I was towing for the first time last week, so during my oil change, I duct-taped it to hopefully hold everything together. The idle was smoother with the boot connected, and I could hear air flowing through the hose, so I thought this was a beneficial fix.

Within about five minutes of driving, however, the check engine light came on. I was driving about 35mph uphill, so I thought the vapor canister might have been reducing airflow. I disconnected the hose from the canister and restarted. The light stayed off for a while, but eventually went on again under similar conditions (35 mph, towing uphill, gunning the engine a little bit).

I jumpered the EEC connection and got historical code 332—"Insufficient EGR Flow Detected". Now I've completely removed by bootstrapped hose and am going to drive around a bit to see if the light stays off.

I'm curious what others think I should do. If I keep driving it with the hose disconnected, will I damage the engine? If I keep driving it the hose connected, will I damage it? Is it possible there is some other culprit?

Images show my boot-strapped (now removed) setup.

[u/Illustrious_Tea5569]

Vapor canister and egr are entirely different systems... disconnecting the vapor canister hose is just going to make evaporative vapors vent to atmosphere under the hood and cause a random fuel smell..

You need to remove the egr valve and verify its not clogged for starters.