Would it cause the car to idle poorly and fail emissions?

 

if the valve leaks the idle would be poor . If the electric part is bad the computer will give a code. A bad valve = bad idle = fail smog test

 

If I'am correct, then the EGR is only used in certian RPM ranges say i.e.; from 2k-3k rpm's. The RPM range is very short. If you have a 93' FD, then you can just take it out and block it off, no harm. If you have a 94'-95' FD then you need to do the same as a 93' FD, then you need to use a resistor to trick the ECU into thinking it's working correctly. There are sites with the How-To. If it's a 93 it will not throw an ECU code.

 

Is that 93 thing true? I have a 93 touring, and just pulled code 16(EGR valve) last night. It's been an ongoing saga. I guess I just have to replace it. As said before, you can take it off, and put a resistor there, but you have to replace the resistors from time to time. I'm too lazy to do that. I'd rather have everything straight forward.
As stated above, the symptoms are bad idle, and running rich.
Good luck
Jim

 

The california '93s will throw an error code if ERG is removed with no resistor.

 

AHHHH the California cars, I always forget about them. Yes if you're in California then all FD's will need a resistor to by pass the EGR. If you are not in Cali. and it is a '93 then just pull it off and then plug the lines. If it's a '94-'95 FD(including Non-Cali and Cali FD's) then you will need a resistor. Juts search I believe it will show you step by step.

 

I guess I have a Cali car. What the hell am I doing with a Cali car in Boston? I guess i'm going to do some research as to where my car came from.
Very interesting..............