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blocking egr valve
This is a discussion on blocking egr valve within the Firebird / WS6 forums, part of the Vehicle Specific category; I made a plate and put it under my egr valve blocking both holes i just wanted to know if ...
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01-10-2011, 03:00 PM #1
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black- firebird formula 99
blocking egr valve
I made a plate and put it under my egr valve blocking both holes i just wanted to know if its ok to do that i didnt wanna remove everything just not have carbon going back into the motor anymore
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01-10-2011, 04:44 PM #2
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1999 Formula WS6 M6-sold- 2001 Silverado Z71
Yes, thats ok. You might get a check engine light from the EGR not working. There is also a spark advance table in the computer programming that add timing during EGR operation. Since its no longer operating, you should have that table Zero'd out.
A mail order tune from Frost can solve the SES light and EGR spark advance table issues.
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01-10-2011, 06:18 PM #3
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black- firebird formula 99
well i have a superchips tune now would that affect it? and does taking out the egr valve really do much?
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01-10-2011, 06:26 PM #4
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1999 Formula WS6 M6-sold- 2001 Silverado Z71
Physically removing it and blocking off the holes saves weight and cleans up the underhood look. Might be a small performance gain from no recirculating the exhaust gases.
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01-13-2011, 02:05 AM #5
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01-13-2011, 02:29 AM #6
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Black- 2000 WS6 6spd Hooker LT
^^^More pollution, specifically NOx. Exhaust Gas Recirculation recirculates the exhaust into the combustion chambers to lower the heat in the cylinder, thus hindering NOx creation. NOx is created by high cylinder temperatures/lean mixtures.
Under full acceleration, the PCM dosen't use EGR, since the Air Fuel ratio is plenty rich enought to support lower combustion temps.
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01-13-2011, 05:05 PM #7
I just blocked off my EGR port on my manifold and I unplugged the wires from the EGR valve.
This made the Service Engine Light turn on, is there any special tuning I need to do for an egr-less motor
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01-13-2011, 05:29 PM #8
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01-13-2011, 06:03 PM #9
Egh, if that's the case... I'll hold off on the EGR delete until I get my new manifold, throttle body, and MAF. Then I'll get it tuned at a local shop.
Do you know the codes for the EGR?
Also, I've noticed that the engine is a lot smoother in the 1000 - 3000 rpm range. And from what I've heard, deleting the EGR does not actually increase top end HP.
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01-14-2011, 02:25 AM #10
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02-15-2011, 12:12 PM #11
Ive been wondering what to do with an ls6 intake i recently aquired too
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02-15-2011, 01:55 PM #12
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03-03-2011, 12:45 PM #13
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black- firebird formula 99
I bought a 85mm bbk throttle body for my car and bought the slp maf with it its also 85 mm so i wasted my money on the maf?
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03-03-2011, 01:16 PM #14
WEll with the SLP MAF I honestly never had an issue with it but alot of tuners say SLP MAFs casue issues in the fuel timing. I went to am OEM GM LS 85mm MAF since i went with all LS6 induction system plus! it was cheap.. like $50 plus 25 for shipping. Although thats still more then what i paid for my SLP MAF
I got mine for free lol.
I will say you paid a bit much for the your setup though. I bought my 80mm TB for $80 and the 85mm MAF for $75 off ebay brand new. The TB nice but the MAF you could have spend you money else where for somthing better.
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03-03-2011, 02:21 PM #15
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03-03-2011, 03:06 PM #16
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black- firebird formula 99
A tune like a dyno shop would do or? I have the superchips 91 pref on it now oh and do i have to get a tune for the throttle body to? i know thats a stupid question but
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03-03-2011, 04:39 PM #17
ideally you'll want to tune for those mods as a group....if you plan on any other mods in the near future do those first before getting the tune. Most dyno shops that tune can probably hook you up but get references. For the mods you have a frost mail order wouldn't be a bad option just due to the cost per mod ratio. The only thing is tuning for that MAF via mail order.....you'll want to ask frost about that.
With that superchips tune I can almost guarantee you're getting some detonation with those mods....the only way to know for sure is log the car and see what's going on with it. I'm sure that tuner bumps the timing up and you're still running the egr adder so that's why I'm guessing you're getting some detonation. If it were me I'd probably sell that superchips tuner and get a frost mail order and have money left over plus a better tune.
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03-03-2011, 04:57 PM #18
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black- firebird formula 99
Yeahhh ive been told that about the superchips by alota people
wish i would of known this is my first car i can tune ive always had carbureted motors so i thought superchips was good cuz there such a big name i shoulda did a lil more studying up thanks for the advice tho ill be checking out frost
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03-03-2011, 04:59 PM #19
the good news is there's a sucker born every minute
you shouldn't have any trouble at all getting your money back on that tuner......if you bought it used. Please tell me you bought it used???
If you bought it new you're probably gonna take a beating on it if you decide to sell it.
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03-03-2011, 05:25 PM #20
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black- firebird formula 99
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