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Bonemaro
04-14-2010, 11:55 PM
I started my EGR delete tonight. My father made these plates for me out of stainless steel.

http://www.v6f-body.com/pics/Intake%20EGR%20Plate.jpg

I unplugged the EGR and capped off the intake to test what the effects are on my gas mileage. I shall report.

Battousai
04-14-2010, 11:58 PM
any check engine lights?

I might get block off plates, if I can figure out how to get the EGR CEL to go away.

Bonemaro
04-15-2010, 12:10 AM
any check engine lights?

Not since Mr. PCM visited Mr. HPTuner. :bat:

Battousai
04-15-2010, 01:04 AM
lol, gotta get me one of those :)

Bonemaro
04-15-2010, 09:09 AM
Hmm... I got a P0171 & P0174 code this morning; System too lean on Banks 1 & 2.

Could these codes just be temporary due to changing the system up, or do you think maybe I'm getting a vacuum leak from the plate? I used high temp RTV on it. Any of y'all out there sans EGR have any similar issues?

freakv6
04-15-2010, 09:49 AM
sounds to me like there is definetly a vac leak somewhere. how long did you let it sit before you fired it up?

Bonemaro
04-15-2010, 10:12 AM
how long did you let it sit before you fired it up?

:hmm: 2... maybe 3.... minutes. :dis:

freakv6
04-15-2010, 11:09 AM
lol yea i would reseal it and let it sit over night

Bonemaro
04-15-2010, 03:43 PM
Think I'm gonna run out and see it I can tighten the plate a little more. If the light comes on again, I'll reseal it tonight.

Travis@gvperformance
04-15-2010, 04:03 PM
add some rtv to it and let it dry over night

Bonemaro
04-15-2010, 04:06 PM
I'll need to scrape it. It probably has some old crap in it.

ThunderChicken
04-15-2010, 05:38 PM
For anyone wondering, you can't do an EGR delete on the 3.4. The hot exhaust will come back up the EGR tube, have nowhere to go, and you will melt a plug wire or at least the conduit that covers it. Ask me how I know... *grrr*

Will
04-15-2010, 07:22 PM
For anyone wondering, you can't do an EGR delete on the 3.4. The hot exhaust will come back up the EGR tube, have nowhere to go, and you will melt a plug wire or at least the conduit that covers it. Ask me how I know... *grrr*

the trials and tribulations of being a 3.4 owner/modifier

ThunderChicken
04-15-2010, 08:59 PM
the trials and tribulations of being a 3.4 owner/modifier

Pshhht...that was just to fix a STOCK problem. :banghead:

Bonemaro
04-15-2010, 11:41 PM
Ok... I re-rtv'ed the plates and I'll let it sit over night. Hope this works. I wonder if these codes could be coming because the egr is still on the car. I unplugged it, but is it possible that gasses are still coming out the hose?

Italia
04-16-2010, 01:15 AM
you mean from the header into the EGR where the sensor is? Def. I thought by deleting the EGR you had removed it completely and welded off/over the provisions?

Will
04-16-2010, 03:52 AM
Pshhht...that was just to fix a STOCK problem. :banghead:

**See below**


the trials and tribulations of being a 3.4 owner/modifier

:rofl:

freakv6
04-16-2010, 09:06 AM
Ok... I re-rtv'ed the plates and I'll let it sit over night. Hope this works. I wonder if these codes could be coming because the egr is still on the car. I unplugged it, but is it possible that gasses are still coming out the hose?

Wasnt that the recommendation from zzp? However, I do have both of mine blocked.

Bonemaro
04-16-2010, 09:38 AM
Not sure.

Ok, I RTV'ed the bejebus out of it. I can't see any conceivable way it could leak.

I'm not getting the P0171 code anymore, but I'm still getting a pending P0174. That's bank 2 on the passenger side and is the same O2 sensor I've been have issue with since I started fiddling with the exhaust.

Riddle me this. Is it logical to assume that sensor is finicky enough to be triggering codes from the changes to my intake?

freakv6
04-16-2010, 10:19 AM
i wouldnt think so. and now that you mention it, im getting that same code here recently. im thinking the 02 on mine is just shot.

Bonemaro
04-16-2010, 10:27 AM
Bank 2 is the only O2 sensor on the car that hasn't been replaced. It has 122K miles on it.

ThunderChicken
04-16-2010, 03:05 PM
Okay, guys. The whole point of the EGR is to recirculate NOx and bring the temp of the combustion chambers down. If you block it off, the system is going to burn hotter and you risk pre-ignition and less efficient burn of the fuel. That is going to cause your O2 sensors to get improper readings and will eventually burn them up.

And if you don't delete it from your computer, the car will still throw a code and your gas mileage will be decreased. If you've had your PCM tuned, I'm not sure how that's going to effect it, but if your PCM is still stock-programmed and you have an EGR, blocking it off won't do anything positive.

Bonemaro
04-16-2010, 03:18 PM
Can it really get hot enough to risk pre-ignition?

freakv6
04-16-2010, 03:48 PM
Okay, guys. The whole point of the EGR is to recirculate NOx and bring the temp of the combustion chambers down. If you block it off, the system is going to burn hotter and you risk pre-ignition and less efficient burn of the fuel. That is going to cause your O2 sensors to get improper readings and will eventually burn them up.

And if you don't delete it from your computer, the car will still throw a code and your gas mileage will be decreased. If you've had your PCM tuned, I'm not sure how that's going to effect it, but if your PCM is still stock-programmed and you have an EGR, blocking it off won't do anything positive.


While you are right on the reasons a egr is in place, removing it will have no ill effect on your car other then losing a mpg or 2. The remvoal of the egr doesnt cause a large enough change in combustion temps to cause any damage. There are plenty of guys without egr that have been running that way for many years.

Mogobs30th
04-16-2010, 03:53 PM
Okay, guys. The whole point of the EGR is to recirculate NOx and bring the temp of the combustion chambers down. If you block it off, the system is going to burn hotter and you risk pre-ignition and less efficient burn of the fuel. That is going to cause your O2 sensors to get improper readings and will eventually burn them up.

And if you don't delete it from your computer, the car will still throw a code and your gas mileage will be decreased. If you've had your PCM tuned, I'm not sure how that's going to effect it, but if your PCM is still stock-programmed and you have an EGR, blocking it off won't do anything positive.

This is true and false at the same time. If the EGR code is tuned OUT of the PCM, and the EGR is unplugged and removed, then the PCM will not have to compensate for the signal loss. The temps will burn SLIGHTLY hotter, but not nearly enough to burn out an O2 sensor. The sensors are going to work properly when the EGR code is deleted, because the PCM no longer has to receive a signal to adjust the fuel tables.

I do respect your schooling, but when it comes to custom tuning, its a whole new ballgame.

ThunderChicken
04-16-2010, 04:05 PM
I do respect your schooling, but when it comes to custom tuning, its a whole new ballgame.

This is true, and I know I have a lot to learn in that department. I don't think it really is hot enough for pre-ignition on its own, but if you're not burning right to start with, it could.

And it's not legal in NC unless you're lucky enough to find someone who doesn't look under your hood. :hmm:

Bonemaro
04-16-2010, 04:10 PM
Let's hope they don't start that crap in GA.

Hot Rod
04-17-2010, 11:06 AM
I'd be welding them plates on there. As far as the header part. I had a bolt covering the hole with some welds on it and the damn thing eventually blew out. :lol:

My EGR though is just sitting in its place, plugged in but the tube is cut off and the headers welded up. No codes and car runs like it should. Best and easiest thing to do, IMO.

Bonemaro
04-17-2010, 04:40 PM
Seems to be doing ok... looks like maybe a little fuel mileage loss though. Not sure if I want to do that.

Tpres
04-19-2010, 11:19 PM
For anyone wondering, you can't do an EGR delete on the 3.4. The hot exhaust will come back up the EGR tube, have nowhere to go, and you will melt a plug wire or at least the conduit that covers it. Ask me how I know... *grrr*

How do you know bethany?Hey your the one that said ask me how i know!!

ThunderChicken
04-20-2010, 08:29 AM
How do you know bethany?Hey your the one that said ask me how i know!!

:slap:

Bonemaro
04-20-2010, 09:39 AM
Hmm... looks like I might be getting 250 miles to a tank. Not so sure I like that. :dis:

bob8703
04-20-2010, 11:46 AM
Hmm... looks like I might be getting 250 miles to a tank. Not so sure I like that. :dis:

MPG is soooo overated.

Bonemaro
04-20-2010, 01:07 PM
I'm gonna call it 260. I'm gonna try one more tank, as I was getting P0170 & P0174 codes initially. Those have settled, so we'll see if I hit 260 again.


MPG is soooo overated.

Rich boy.

Pace
04-20-2010, 11:49 PM
If you still have an O2 sensor that's acting a little funny, you might look into replacing it. Bad gas mileage can be the result of a bad O2, and they're especially prone to going bad after installing new headers. Granted, deleting the EGR can cause slightly worse gas mileage, it shouldn't make such a drastic difference in mpg.

Bonemaro
04-21-2010, 09:06 AM
I have had an O2 sensor that's been acting up for quite some time now. Just been limping on it the best I can and getting my emissions done during the times it's cooperating. I have an exhaust leak as well that could be causing issues. One of these days, I'll get with my welding buddy and we'll fix up these exhaust issues.

Italia
04-24-2010, 12:53 AM
I love living right around the corner from my exhaust shop. It's close and most of the work is favor work.

You should try that. Get them to fix it for "free" and in your free time help them out around the shop.

venom
04-24-2010, 08:34 AM
Hmm... looks like I might be getting 250 miles to a tank. Not so sure I like that. :dis:

i dont even see 250 unless i go home for the weekend (more highways miles)

Bonemaro
04-24-2010, 12:35 PM
Clean your MAF sensor. I was seeing 270-280 city on 3.73's and semi aggressive driving.

bob8703
04-24-2010, 12:37 PM
close to 300 is about that i see on a tank with a bad O2 sensor, around 400 if all i do is highway driving.

Bonemaro
04-24-2010, 04:54 PM
Yeah, Bryce, if you aren't hitting 250, something is up. The last time I drove to Ohio with the 3.23's, I got 525 to a tank.

Italia
04-24-2010, 11:53 PM
i dont even see 250 unless i go home for the weekend (more highways miles)

pretty much this but the engine has a slight stumble to it under idle. kinda like a vrr-vrr-vrr-vrr-vrrrrrrr-vrr-vrr-vrr-vrr-vrrrrrrr

I don't keep much track of my mpgs though.

ThunderChicken
04-25-2010, 05:10 PM
IAC.

Pace
04-25-2010, 05:30 PM
IAC.

His car is DBW and doesn't have an IAC.

bob8703
04-25-2010, 05:47 PM
Yeah, Bryce, if you aren't hitting 250, something is up. The last time I drove to Ohio with the 3.23's, I got 525 to a tank.

damn i need to get my o2 replaced then too lol, i wish i could hit 525 lol

Bonemaro
04-25-2010, 05:57 PM
His car is DBW and doesn't have an IAC.

IAC??? DBW???

bob8703
04-25-2010, 06:07 PM
IAC??? DBW???

idle air control and drive by wire

ThunderChicken
04-25-2010, 10:53 PM
Ah. Thank you. :)

Geez...'98-up. I knew that! Or is it all 3.8s?

Pace
04-25-2010, 11:54 PM
Ah. Thank you. :)

Geez...'98-up. I knew that! Or is it all 3.8s?

99-02 V6s have the electronic throttle body. 93-98 V6 and all V8 F-bodies are cable controlled.

ThunderChicken
04-27-2010, 11:06 PM
99-02 V6s have the electronic throttle body. 93-98 V6 and all V8 F-bodies are cable controlled.

:bowdown: TY!!

Bonemaro
04-27-2010, 11:49 PM
Ok... I just got 300 city miles from my last tank.

venom
04-28-2010, 12:10 AM
Ok... I just got 300 city miles from my last tank.

thats dang good in my book