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EGR valve block off for 2.5L Duke
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Ksim19 View Drop Down
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Points: 12 		Post Options Post Options   Quote Ksim19 Quote  Post ReplyReply Direct Link To This Post Topic: EGR valve block off for 2.5L Duke
    Posted: 21 December 2010 at 9:19pm
On my 84 2.5L i found out my EGR valve is broken and has been strapped in by a coat hanger wire by one of the previous owners.

So the question is, if I do a block off plate is there any issues that i will come across by doing one?

btw I searched and can only find info about the 2.8L and they have to reprogram the ecu on some of them. Is this also the case with the 2.5L?
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Romeo View Drop Down
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Points: 3033 		Post Options Post Options   Quote Romeo Quote  Post ReplyReply Direct Link To This Post Posted: 22 December 2010 at 7:04pm

I'm sure there are others in here with the exact opposite opinion, but everything I've seen about EGR systems seems to suggest simply repairing it. Given that the EGR system doesn't engage at WOT, you're not exactly sacrificing power in fixing it, and you have a better chance at passing NOx at AirCare with it in.

As for there being any issues, I'll let the Doc or David answer for sure, but I know in most cars, the ECU will monitor the MAP/EBP/DPFE (Ford only) to ensure that the EGR is functioning properly, and if the Fiero is the same, it will set a code if it can't flow.
Never shift into reverse without a back-up plan.
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Points: 12 		Post Options Post Options   Quote Ksim19 Quote  Post ReplyReply Direct Link To This Post Posted: 22 December 2010 at 8:30pm
Originally posted by Romeo Romeo wrote:


Given that the EGR system doesn't engage at WOT, you're not exactly sacrificing power in fixing it, and you have a better chance at passing NOx at AirCare with it in.


I don't have AirCare where I live so that's not a major concern for me. I just would like to spend money elsewhere other than emission control.
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Ksim19 View Drop Down
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Points: 12 		Post Options Post Options   Quote Ksim19 Quote  Post ReplyReply Direct Link To This Post Posted: 22 December 2010 at 10:25pm
I think i found my answer here:
http://www.fiero.nl/forum/Forum2/HTML/108166.html

So basicly it sounds like it will run a little bit leaner, thus causing knock in some applications. So from what my knowledge and from what I have read, run a higher octane or possibly retard timing or both if its knocking badly.

Does this sound correct?
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Patrick View Drop Down
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Points: 6 		Post Options Post Options   Quote Patrick Quote  Post ReplyReply Direct Link To This Post Posted: 23 December 2010 at 1:23am

Originally posted by Ksim19 Ksim19 wrote:

I don't have AirCare where I live so that's not a major concern for me. I just would like to spend money elsewhere other than emission control.

If you want to spend less money on gas, replace the EGR valve.

 
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Romeo View Drop Down
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Points: 3033 		Post Options Post Options   Quote Romeo Quote  Post ReplyReply Direct Link To This Post Posted: 23 December 2010 at 3:58pm
Yeah dude, not exactly Mr. Environmentalist myself, but given the amount of effort required (ECU flash, plugging it, higher octane fuel, less power at peak RPM due to spark retard) you're honestly just better off replacing the damn thing. lol
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Patrick View Drop Down
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Points: 6 		Post Options Post Options   Quote Patrick Quote  Post ReplyReply Direct Link To This Post Posted: 23 December 2010 at 4:05pm

Originally posted by Romeo Romeo wrote:

...you're honestly just better off replacing the damn thing. lol

Exactly! 

 
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