Simple EVR question

[89roadster]

Does it matter which connection on the EVR goes to either of the ports?

I can't find any info on whether the top or bottom port goes to the EGR.

Thanks for any assistance.

 

[raph130]

*

 

[HISSIN50]

whats a evr? Do you mean egr?

EVR is a sensor for the EGR.

 

[Michael Yount]

YES - It DEFINITELY matters. The evr is the computer controlled switch that tells the egr when and how much to open. Full vacuum goes to the evr from the manifold. Then a line goes from the other evr port to the egr valve. At idle and at w.o.t. the computer disables the egr valve. So when hooked up correctly, you can pull the line off the egr valve at idle, and nothing at all will happen. There'll be no vacuum pulling on the line, and the egr would have been closed anyway at idle.

One of the Stangers will have to tell you which port is which. I removed my evr/egr valve for packaging reasons, and turned off the egr function in my ecu with the chip.

 

[Michael Yount]

If push comes to shove - just guess. And go for a drive. If you get it backwards, you'll likely get an error code, and perhaps a check engine light that'll be related to a malfunctioning egr/evr system. If that happens, swap them. If it doesn't happen, do the check I described above - pull the line off the egr valve at idle. If the line has no vacuum, and the car's running ok, chances are you've got it right.

 

[89roadster]

If push comes to shove - just guess. And go for a drive. If you get it backwards, you'll likely get an error code, and perhaps a check engine light that'll be related to a malfunctioning egr/evr system. If that happens, swap them. If it doesn't happen, do the check I described above - pull the line off the egr valve at idle. If the line has no vacuum, and the car's running ok, chances are you've got it right.

With a brand new EVR and EGR, I'm getting codes 33/44/94 .... so tomorrow I'm going to try switching the lines and seeing if they all go away (prior to replacing the EVR, I was getting code 84 in addition to the ones above)

 

[Michael Yount]

Did you clear any codes that existed from before you switched the parts? Is it possible the codes were there from before the parts switch? In the KOEO mode, the computer will usually remember them until they're cleared.

 

[89roadster]

Did you clear any codes that existed from before you switched the parts? Is it possible the codes were there from before the parts switch? In the KOEO mode, the computer will usually remember them until they're cleared.

They came while I was doing a KOER...but, no, I didn't clear the codes, I assumed since the 84 code went away, then the others should have too if they were fixed.

 

[89roadster]

Bahh...it was hooked up correctly and I went out there with my multimeter and tried to watch for the EVR to get grounded by the computer and it never completed the ground. If I completed the ground at idle, the EGR opened and the engine died (plenty of vacuum...that's ruled out).

So does anyone know what sensors/events are involved with telling the EVR to open????

Thanks.