So help me out here. 84 2.5 auto. new head. New exhaust (exhaust + cat+tip)(welded and clamped) all new sensors (temp) fuel filter and air filter=new battery=new new oil+filter
The thing that failed was "NOx" i was allowed 13** and got 31**
I'm going to change the o2 sensor and the EGR. (soon) I'm also going to seafoam it through a vacuum hose so that my intake can clean itself out.
everything else went by good.
What else do you think i should do?
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11:21 PM
PFF
System Bot
aconesa Member
Posts: 374 From: Trenton, New Jersey, USA Registered: Jun 2005
If the one you are looking at is one of the "universal" EGR valves, where you fit a specific washer in the valve based on which engine you have, I'd stay away. Back when I had my '86 Duke, I used one of those, and while it worked and got me though inspection, it also gave me poor drivability. I had an annoying bucking at light throttle on the highway, and it seemed to stumble a bit under light throttle accel.
You don't specifically have to get the valve from the Fiero store, but the one they sell is a genuine AC Delco replacement, which is the correct model for our cars. After I gained the problems I just mentioned (when I got the car, the EGR was disabled, and those problems started as soon as I put the universal valve on), I swapped the universal valve for the AC Delco unit from the Fiero store, and those issues disappeared. My highway fuel milage even improved a bit as well!
So the long and the short: Stay away from universal EGR valves, and stick with AC Delco!
------------------ '87 GT, 5 Speed, Loaded. Resto Project
I'm not sure if you saw. but if the link didn't work, i put a part # under it. I don't think it is a universal. I'll get this next check. Autozone seems so be my favorite place to go. at least i can be the one to tell you if it works well or not. Do you guys think i should replace anything else?
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03:00 PM
Mr.PBody Member
Posts: 3172 From: Cincinnati, Ohio, USA Registered: Oct 2006
I'll agree on the Fiero store genuine AC Delco replacement EGR valve, my Duke is running like a champ. Just a couple more dollars and I got the exact AC Delco factory EGR and I get to support the Fiero Store which helps us keep our little cars running. I figured that the EGR is such a critical part of the drivability, performance and emissions, why not just get the official part and be done with it.
I'll most likely go with the autozone egr. I'll post back when i do it.
Pick up an extra gasket while you're at it. Chase the threads and use new bolts with a bit of anti-sieze and you'll be able to finger tighten them all the way down. I found that a 13MM distributor wrench was perfect for the tight fit around the bolts and won't strip the head.
Good luck with the emissions testing.
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09:10 PM
ly41181 Member
Posts: 1013 From: The Vill of Hodgens, ky Registered: Sep 2002
I just installed the EGR from auto zone. It went super quick and bolts were easy. (i put anti seize in them last time) I used a wrench and it only took about 10 minutes to do the whole thing. including taking the aircleaner off and putting everything back on. In a week or so I'll go back to get my emissions test. And see how it goes.
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05:32 PM
pswayne Member
Posts: 1282 From: Lawrenceville, GA USA Registered: Sep 2006
I put one of those universal EGR valves on my 88 duke, and it passed emissions with flying colors (after failing on NO the first time), and it runs just fine.
