OK so I almost positive my egr valve is stuck closed, the exhaust smells weird, mild performance loss, and spark knock under load/high rpms. Anyone know the correct way to connect the vacuum hoses to it? 1995 5.9 360 btw
Thanks

 

There's probably a diagram under teh hood.


To see if the valve is working, apply vacuum directly to the valve while idling, if the valve opens, you'll know.

 

could be your plenum too

 

I just replaced the plenum so I know its not that, and I ill try directly applying vacuum to it, there is a diagram under the hood. but its not very helpful at alll lol

 

you could also just block it off...

 

Did you also replace the o2 and at least had the cat checked, gutted, or replaced?

 

Yes i just gutted that cats and nothin changed and new 02 sensor, i got a new egr, just looks like its gonna be a pain to hook up and figure out which vacuum lines go where.