I just removed the stock header to a 2003 Mazda Protege5. I had an issue reconnecting the EGR Valve to the new headers because the stock headers had female threads and the new headers had a male thread. Due to time constraints I plugged blocked off the EGR valve. Right now it runs fine.

Now my question is will any long term effects come from blocking off the EGR valve or should I get it reconnected as soon as possible?

Any help would be great!

 

it will eventually throw an emissions code without the egr, but it won't affect the performance if you remove it the correct way.

 

I was already getting codes for the EGR before (it was probably on the way out) I bypassed it. I'm not in CA so I won't have to pass an emissions test.

After I remove it is there anyway that I can delete the code?

 

I will have to look it up, but I think that you need to wire a resistor into the harness where the egr plugs in and put a block-off plate on the egr opening.