ratio411
Founding Member
They are not related.how are the smog and egr un related? it looks like all the egr stuff is on the hose assembly by the passenger side header, and the main inlet for that is the smog pump?
if i kept the egr stuff, i should just leave the smog pump stuff alone right?
The smog pump feeds clean air into your exhaust stream so that the cats have enough oxygen to run hot and burn off polution.
If you don't have cats, your smog pump is running for no reason.
If you do have cats, and remove the smog pump, it is possible that your cats clog up due to lack of oxygen/heat.
The EGR is totally internal plumbing, except for the water lines going into the TB adapter. All you see is the lines, and the valve on the adapter (and wires of course). With the smog system, 99% of the system is external to the engine.