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Board index » 1997-2008 Grand Prix Discussion » Supercharged 3800 L67/L32

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SAMzGXP
 Post subject: EGR question
PostPosted: Sun Feb 15, 2009 7:09 pm 
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whats EGR?

and what happens if its blocked from both LIM and headers?

thanks

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SMM2469
 Post subject: Re: EGR question
PostPosted: Sun Feb 15, 2009 9:22 pm 
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The exhaust gas recirculation (EGR) system is used to reduce the amount of nitrogen oxide emission levels caused by combustion temperatures exceeding 1,500°F. It does this by introducing small amounts of exhaust gas back into the combustion chamber. The exhaust gas absorbs a portion of the thermal energy produced by the combustion process and thus decreases combustion temperature. The EGR system will only operate under specific temperature, barometric pressure and engine load conditions in order to prevent driveability concerns and to increase engine performance.

If you want to remove it, then you will need to modify the PCM to ignore the EGR valve's readings...

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SAMzGXP
 Post subject: Re: EGR question
PostPosted: Sun Feb 15, 2009 10:12 pm 
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so i can block my LIM and my headers as long as i modify my PCM? and wont hurt the car?

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SMM2469
 Post subject: Re: EGR question
PostPosted: Sun Feb 15, 2009 10:20 pm 
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Correct, you will probably lose a bit of gas mileage...

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Kyle_99_gtp
 Post subject: Re: EGR question
PostPosted: Sun Feb 15, 2009 11:30 pm 
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EGR is smoking ciggarettes for your engine. EGR is only there so its harder to change the rear spark plugs.

i kid, but its more or less something you can get rid of and wont miss.

and i didnt lose any mpg's at all when i deleted my EGR...

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Condore21
 Post subject: Re: EGR question
PostPosted: Mon Feb 16, 2009 1:58 am 
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But how is your car running now Kyle? Any better?

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Kyle_99_gtp
 Post subject: Re: EGR question
PostPosted: Mon Feb 16, 2009 1:09 pm 
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yeah i changed out the o2 sensor and reset the codes, (apparently just clearing them via aeroforce isnt enough) and now my car loves me again.

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SAMzGXP
 Post subject: Re: EGR question
PostPosted: Mon Feb 16, 2009 2:23 pm 
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Kyle_99_gtp wrote:
yeah i changed out the o2 sensor and reset the codes, (apparently just clearing them via aeroforce isnt enough) and now my car loves me again.


so kyle if i do delete my EGR all i gotta do is program my pcm to ignore EGR? thats it?

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hotrodolds
 Post subject: Re: EGR question
PostPosted: Mon Feb 16, 2009 2:38 pm 
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Yeah. I actually set my PCM to turn on the EGR at a coolant temp that it will never reach. I didn't lose any fuel mileage, either.

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Kyle_99_gtp
 Post subject: Re: EGR question
PostPosted: Tue Feb 17, 2009 1:21 am 
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SAMzGTP wrote:
Kyle_99_gtp wrote:
yeah i changed out the o2 sensor and reset the codes, (apparently just clearing them via aeroforce isnt enough) and now my car loves me again.


so kyle if i do delete my EGR all i gotta do is program my pcm to ignore EGR? thats it?


and just block it off. the engine bay is much cleaner with it removed.

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SAMzGXP
 Post subject: Re: EGR question
PostPosted: Tue Feb 17, 2009 1:24 am 
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any pics under the hood?
just curious

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Perforator
 Post subject: Re: EGR question
PostPosted: Tue Feb 17, 2009 6:20 am 
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Kyle_99_gtp wrote:
the engine bay is much cleaner with it removed.

Your LIM will be much cleaner too!

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SAMzGXP
 Post subject: Re: EGR question
PostPosted: Tue Feb 17, 2009 12:09 pm 
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so once i blocked my LIM and my headers i can remove the whole EGR unit?

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hotrodolds
 Post subject: Re: EGR question
PostPosted: Tue Feb 17, 2009 12:12 pm 
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Yup. It will keep the carbon buildup off of the insides of the blower and LIM.

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