TBI EGR issue.

[Allen4rmGromLak]

Other issues have came up on the truck. Gonna pull the engine and rebuild the TBI engine. Found a harness that's mint. So gonna stay with the TBI.

 

[Vjcamp]

If you unplugged the vacuum hose to the EGR valve and It now runs fine than the problem is probably with the EGR Vacuum Solenoid. Follwo vacuum line back from valve, should come to an electric solenoid valve that has two vacuum fittings: one is the line you followed back and the other is the supply line. Solenoid is probably stuck in the apply position, or is leaking vacuum even when 'closed". if that is the case replacing the solenoid will fix it.

 

[PlayingWithTBI]

Or the vacuum line is connected to the wrong port on the solenoid. Ask me how I know...

 

[RawbDidIt]

Or the vacuum line is connected to the wrong port on the solenoid. Ask me how I know...

How do you know?

Sent from my SM-G965U using Tapatalk

 

[PlayingWithTBI]

LOL - I hooked the line up to the wrong port so when it warmed up, cruising over 45MPH the EGR solenoid opened up and the engine started stumbling (because of the vacuum leak) and it threw the EGR code. Swapped the line to the other port and it ran great.