86 EGR delete question
Melting Slicks
Joined: Mar 2016
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From: Langley BC
Thread Starter
Instructor
Joined: Oct 2015
Posts: 134
Likes: 6
From: Osceola WI
I already have a prom installed with the egr deleted, however i do need to check with them to see if they changed any of the tables for fuel and spark or if the just eliminated the SES light. I was having some slight pinging before the new prom and after, but i suspect vacuum leaks or even timing issues. This car had a couple problems when i bought it and with 175k on the clock its bound to be a bit tired.
New injectors are just one item on the list as i a, sure these are OE
New injectors are just one item on the list as i a, sure these are OE
Le Mans Master
Joined: Aug 2007
Posts: 8,735
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From: WV
I have a TPIS block off plate for the rear of the manifold you can have for $12.00 shipped.. TPIS sells them for $15.00 plus shipping..Below is their link...WW
https://www.tpis.com/parts/view/12
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https://www.tpis.com/parts/view/12
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Last edited by WW7; Feb 20, 2017 at 04:38 PM.
Drifting
Joined: Feb 2006
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From: Magnolia Tx
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Brett Foote
Oil Producer
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I don't think it will fail a sniffer test because EGR only activates with a warm engine at highway speed's is my understanding. But my understanding is that EGR is actually good for the car at that speed and good for performance and good for the environment.
Last edited by VikingTrad3r; Feb 21, 2017 at 10:48 PM.
Thread Starter
Instructor
Joined: Oct 2015
Posts: 134
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From: Osceola WI
I have been reconsidering deleting bothe the EGR and the AIR. Everything on the car seems to work. I was planning on doing it to reduce clutter and make it easier to work on but now i am thinking of leaving it in there. However i did buy a chip burnt with it all deleted and hate to waste that money
Oil Producer
Joined: Apr 2014
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The air I can understand. It does absolutely nothing. And it provides belt resistance and weight and lots of engine clutter. You can delete the air and leave the EGR. That's my plan.
I have yet to find someone who just went to a shorter belt though. I found one forum thread have a guy who said he had to go through many different belt lengths before he finally got the right belt, but he did not provide a part number for the belt.
I would love to get rid of air my catalytic converter is gutted anyways.By the way gutting the air will definitely fail you on a inspection if you live in a part of our continent that has that.
I would love to get rid of air my catalytic converter is gutted anyways.By the way gutting the air will definitely fail you on a inspection if you live in a part of our continent that has that.
Last edited by VikingTrad3r; Feb 22, 2017 at 08:49 AM.
Melting Slicks
Joined: Mar 2016
Posts: 2,778
Likes: 580
From: Langley BC
I agree with VikingTra3r.
I think the EGR is actually a pretty smart little piece of equipment IMO. It increases fuel mileage at low loads and has no effect on Full throttle performance.
I choose to leave my EGR but delete the rest of emissions stuff.
I think the EGR is actually a pretty smart little piece of equipment IMO. It increases fuel mileage at low loads and has no effect on Full throttle performance.
I choose to leave my EGR but delete the rest of emissions stuff.
Last edited by DMITTZ; Feb 21, 2017 at 11:40 PM.
Le Mans Master
Joined: May 2006
Posts: 7,708
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From: indy indiana
The air I can understand. It does absolutely nothing. And it provides belt resistance and weight and lots of engine clutter. You can delete the air and leave the EGR. That's my plan.
I have yet to find someone who just went to a shorter belt though. I found one forum thread have a guy who said he had to go through many different belt lengths before he finally got the right belt, but he did not provide a part number for the belt.
I would love to get rid of air my catalytic converter is get it anyways.By the way gutting the air will definitely feel you on a inspection if you live in a part of our continent that has that.
I would love to get rid of air my catalytic converter is get it anyways.By the way gutting the air will definitely feel you on a inspection if you live in a part of our continent that has that.
Drifting
Joined: Feb 2006
Posts: 1,423
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From: Magnolia Tx
A bad or removed EGR valve will cause high NOx and that will fail a sniffer test. As I said, its better to leave it on unless you have a good reason to delete it.
Oil Producer
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interesting. i was under the impression that egr only activated at highway conditions (high tps and rpm and temp).
Thread Starter
Instructor
Joined: Oct 2015
Posts: 134
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From: Osceola WI
It should, but if failed open it would allow exhaust gass through all the time. Same with fauled check and diverter valves, which can cause the O2 sensor to read funny and probably cause the ECU to compensate with more fuel. At least that makes sense to me
Team Owner
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
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Team Owner
Joined: Sep 2001
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From: Athens AL
C7 of the Year - Unmodified Finalist 2021
C4 of Year Finalist (performance mods) 2019
Cruising conditions need not necessarily be highway usage however, and the sniffer test will approximate conditions that should trigger the EGR to function so that it will cut NOx.
Last edited by vader86; Feb 22, 2017 at 11:06 AM.
Team Owner
Joined: Feb 2006
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From: San Antonio Texas
Friend of mine has an '88 with headers, with no hookup point for the EGR. There is a pipe coming off the rear pass side intake that I think probably used to connect to the stock manifold that has a cap-off plate on the end. I was thinking the cap-off plate would look cleaner if it was mounted directly on the manifold, and eliminate that pipe just sticking out in mid air, BUT there is some sort of single wire sensor screwed into that pipe. Can that one wire sensor be eliminated? What does it monitor?
Sorry I didn't get a picture of it.
Sorry I didn't get a picture of it.
Drifting
Joined: Feb 2006
Posts: 1,423
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From: Magnolia Tx
That wire is a temperature sensor that tells the ECM that the EGR is actually flowing exhaust gas as commanded. I followed the wire back in the loom behind the distributor and unplugged it. Don't cut it, they are getting scarce and bring good money, even used.