piping into exhaust?

[projectmx]

I was looking over the engine recently and noticed some coper colored metal tubing going from near the intake mani into the exhaust manifold any one know what that is?

[Joey's mx]

EGR (exhaust gas return)

[atlantamx3]

Originally posted by Taillon:
EGR (exhaust gas return)

I beleive its Exhaust Gas Recirculation....

[manowar821]

Okay... well..
This so called EGR, does it help the engine at all??
I don't really think I'd want exauhst going back into my engine if I had the choice...

[LongJohn]

Someone else posted that our cars don't have EGR. I think I'm going to crawl around tomorrow and see if I have this tube you are talking about.

Anyway, if it is EGR it's ok. An EGR system sends exhaust gas back into the intake as a replacement for fresh air. This is only under certain circumstances (which I forget). The purpose in this case is to allow additional gas to flow through the combustion chamber to cool it down which reduces the NOx emissions.

[projectmx]

i think the protege had that tube i saw also... and i wondered about it back then... it was a pain when i pulled the tranny to replace the clutch.. was in the way at times.

[Yoda]

All the Mazda B series engine have an EGR from '94 and up.

Originally posted by John Long:
Someone else posted that our cars don't have EGR. I think I'm going to crawl around tomorrow and see if I have this tube you are talking about.

Anyway, if it is EGR it's ok. An EGR system sends exhaust gas back into the intake as a replacement for fresh air. This is only under certain circumstances (which I forget). The purpose in this case is to allow additional gas to flow through the combustion chamber to cool it down which reduces the NOx emissions.

[projectmx]

so if i switch to the b6t turbo manifold will that cause a problem?

[projectmx]

anyone know?

[Joey's mx]

you can bypass the egr it wont cause any problems!! You do the same when converting to a probe header....I just dont know about passing e-test??