I have an 85 z28 with a 350 from a 94 truck in it.It has flowmasters on it.I was looking at the passenger side exhaust manifold ,and I noticed a sylenoid valve thing inline on the exhaust pipe.It has a little nipple on it for a vacuume line,that was disconected.I hooked a vacuume line from my manifold on it ,and it opened up,and my car seemed to run better.my question is does it need to be hooked up or can it be left alone.Also what is it for?

Josh

 

Sounds like the EGR system.

 

isnt the egr on the intake manifold?this is inline of the exhaust

 

it is a valve tat takes exhaust gas and puts it back into the manifold.

 

ok ,but is it imperitive that I keep it?My car has zero smog hookups,lines ETC...we dont have smog laws where I live

 

no, i deleted the EGR from my car, which is a 98.