Alabama, and my civic, salute you.

[CappAttack]

Missing egr valve connector https://imgur.com/yHDZYMc

Here's a pic of the EGR valve and it's absence of a wire.

Edit: Moved the image from a Google drive link to an Imgur link.

[darcane]

Originally Posted by CappAttack

I think I've decided on an ultra gauge for monitoring. Anyone have experiences that decided why you use what you use? If so, mind sharing?

<snip>

Mods that I'm considering: alternator delete, custom front bumper (Bondo?), and Power steering disable (too much work to remove it for the little weight it'd shave off). Any others I should consider?

I have both an Ultra Gauge and a Scan Gauge II. The SGII seems to provide more accurate info when the engine is off or during DFCO. That said... the UG is the one that stays in my car all the time. More info on each screen and easier to flip between screens. I like the UI better and the low price makes it a great value.

PS delete isn't done primarily for weight savings, it is done to reduce parasitic drag on the engine. It's pretty simple to do and the increased effort isn't much of an issue. My wife barely noticed when I killed PS on mine.

[elhigh]

Your picture didn't post, at least not for me.

Drop it into Imgur or similar and post a link here.

[CappAttack]

Just updated the picture link.

[darcane]

Originally Posted by CappAttack

Missing egr valve connector https://imgur.com/yHDZYMc

Here's a pic of the EGR valve and it's absence of a wire.

Edit: Moved the image from a Google drive link to an Imgur link.

You can see it in the background of this pic:

and here:


Pull the cover off of the spark plug wires and see if it is tucked away under there. There should be two wires coming out of the end of this cover, one is the EGR and the other is coolant temp sensor IIRC.

[CappAttack]

Here is what it looks like under the spark plug cover: https://imgur.com/z9t671B
https://imgur.com/VNE7Uup

Not sure where else to look.

Edit: added second picture.

[California98Civic]

You need a shop manual! There are so many details you'll want for reference. You don't have one? Here is a video of a dude cleaning his 7th gen Civic EGR:

https://m.youtube.com/watch?v=JHOtixPU88o

Hope that helps. (And you get great cicada sounds!)

[elhigh]

Well, poop. Where the heck did that cable go?

If I had to guess - and this is coming out of deep left field so don't treat it as gospel at all - the PO either removed it to kill a Check Engine Light (though you would think that would cause it to throw a code) or wanted to prevent EGR so he could wring a few extra horsepower out of it.

You're going to have to source a new cable or build one, and route it back to where it belongs. Not having EGR will truncate your MPG results for sure.

[CappAttack]

Easiest option seems for me to source a a somewhat used engine harness from my local junkyard. I called and they have 5 seventh gen civics in their yard.

[CappAttack]

Update: it seems that the D17A1 engine didn't have an EGR system on motors built 2002 or earlier. What seems likely then is that when this motor was replaced about 40k miles ago that I got a 2003 or newer D17A1 that have the EGR system included. However, the wiring harness and ecu (that's the computer, right?) We're never replaced to support the new motor. Hence my lack of error codes.

Is it worth the trouble to replace both the engine harness and the ecu?