EGR question?!?!

ninety15.0

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#1

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• #1

Im building a new motor this winter and would like to get rid of the EGR system since i am not running cats or the smog pump and emmisions dont matter. I know you can buy a block off plate or just weld the thing shut...but how do u deal with the sensor connection. You would constantly have a check engine light, right?!?!? So what have people done in the past to alleviate this problem?! Any suggestions or pictures would be awesome! thanks!!
-Nick

 

88 Fox GT

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#2

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• #2

You can buy an eliminator here, which tricks the EEC into thinking the EGR is shut (like at WOT) so it gives perfrect A/F mixtures.

http://fordfuelinjection.com/index.php?p=61

 

GroverDill

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#3

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I had my EGR turned off in the EEC via my custom chip

 

jrichker

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#4

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Grover Dill has the only workable solution.

The EGR has nothing to do with the Thermactor Air System(AKA "smog pump") The EGR opens at cruse and closes at WOT. The additional timing the computer adds to compensate for the recirculating EGR gases can cause pinging if the EGR is non-functional or missing. That's why there are only two good solutions: Custom chip or leave it intact & properly working.

I recommend that you spend some more time learning what the various emissions components do before you remove them.

Here's a book that will get you started with how the Ford electronic engine control or "computer" works.

Ford Fuel Injection & Electronic Engine Control 1988-1993 by Charles Probst :ISBN 0-8376-0301-3.

It's about $20 from Borders.com see http://www.amazon.com/ . Select boo...very good, and I found it to be very helpful.

 

88 Fox GT

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#5

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jrichker said:

Grover Dill has the only workable solution.

The EGR has nothing to do with the Thermactor Air System(AKA "smog pump") The EGR opens at cruse and closes at WOT. The additional timing the computer adds to compensate for the recirculating EGR gases can cause pinging if the EGR is non-functional or missing. That's why there are only two good solutions: Custom chip or leave it intact & properly working.

Click to expand...

Or trick the EEC into thinking the EGR is shut (like it is at WOT) all the time with the link I provided. Custom chip would do the same thing as this, only INTERNALLY inside the EEC.

 

ninety15.0

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I understand how they work thanks...why i mentioned those other things is because they are also part of the emmision control systems...of which i have non of them except for the EGR....so thats why i wanna get rid of it...i do really apreciate the advise tought thanks.

 

GroverDill

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#7

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Speed_Demon1965 said:

Or trick the EEC into thinking the EGR is shut (like it is at WOT) all the time with the link I provided. Custom chip would do the same thing as this, only INTERNALLY inside the EEC.

Click to expand...

no it doesnt.

It turns the function off, it does not "trick" the EEC

 

Michael Yount

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#8

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• #8

All of the delete bits I've seen function as Dill describes - they simply trick the ecu into not lighting the check engine light. The ECU will still store a 'soft' error code indicating that the egr has malfunctioned.

The bigger issue is that with egr, at part throttle the ecu adds more ignition advance, and pulls fuel for better mileage and emissions. Without the valve there, extra air displaces the exhaust gas that's gone missing. When you pull fuel and add timing with no functioning valve you often get detonation -- a common problem with folks that have deleted the egr in blunt force fashion. If you're gonna delete it, the way to do it is to turn off the egr function in the ecu via chip or tweecer.

But the real question is why bother? It doesn't hurt peak performance (it's closed at w.o.t.), if helps fuel mileage and helps emissions. Why get rid of something that is a win-win?

 

88 Fox GT

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#9

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My wiring harness came with an internal EGR eliminator. I better not get into detonation or I'm gonna be pissed. That's all I can say.

 

ninety15.0

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#10

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The reason i wanna get rid of it is simply that it looks like $hit and at this point the system is old and probly poorly functioning. I have cleaned the carbon deposits out of it and cleaned around the pintle and seat but i dont think it really helped all that much. Honestly i dont really feel like laying out for a new EGR when i am not even emmision compliant!? it seems foolish. I would rather just get rid of it. I'm going to need some computer work done anyways so it seems to me that it would be pretty easy to get rid of it. thanks for the info, i'll research more about it.

 

Michael Yount

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#11

• Dec 3, 2004

• #11

If you're doing a chip anyway, just turn off the egr function with the chip - that stops all the timing and lean mixture changes the ecu would make if it was functioning.

Speed Demon - in good old chilly Iowa, you probably won't know how it's gonna behave until next summer when the ambient temps get back up. So you won't know you're out of the woods or not for a good 9 months. Unless you had it in this past summer. Some folks experience detonation, some don't. It's not predictable - there are simply too many variables engine to engine/location to location/application to application.