BYPASSING EGR VALVE ON 90 GTA
Member
Joined: May 2001
Posts: 113
Likes: 0
From: feeding hills ma usa
if yoru gonna bybass it just take off the vacume line and plug the line. the egr valve will always think your at wot(wich doesnt matter) and at wot there is no engine vacume so your egr will not turn on.
-Bruce
-Bruce
Supreme Member
iTrader: (9)
Joined: Sep 2001
Posts: 2,984
Likes: 37
From: North Central Indiana
Car: 86 IROC
Engine: 383
Transmission: TKO 600
Axle/Gears: 3.54 Dana 44 IRS
your check engine light will come on and you will get an EGR code. the computer knows weather or not the EGR valve is open via the mass air flow sensor. and you will have to retard your timing also. the EGR is on there for a reason, keep it there. at wide open throttle it closes anyway, so i suggest you keep it. i helps with fuel mileage and emmisions, and like i said, it does not hurt WOT performance.
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86 IROC
43,000 miles
305/700R4/3.23 gears
maroon, gold stickers, black interior, T-Tops.
current mods.
shift kit
headers
cat back exhaust
mods planned for this winter
cam
Adjustable fuel pressure regulator
port and polish intake and heads
lookin to run low 14s maybe squeak out a 13.9 with my stock chip
------------------
86 IROC
43,000 miles
305/700R4/3.23 gears
maroon, gold stickers, black interior, T-Tops.
current mods.
shift kit
headers
cat back exhaust
mods planned for this winter
cam
Adjustable fuel pressure regulator
port and polish intake and heads
lookin to run low 14s maybe squeak out a 13.9 with my stock chip
Joined: Dec 2000
Posts: 2,341
Likes: 151
From: Cincinnati,Ohio
Car: 1991 BandittII Firebird
Engine: 5.7 HSR
Transmission: 700R4
Axle/Gears: 3.27 9 bolt
the EGR will also lower cumbustion chamber temps.
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1991 banditt2 #130 of 600
Project 350 TPI Banditt II
http://www.street-dawg-racing.cityslide.com
www.gcfba.com (Greater Cincinnati F-Body Association)
http://www.cincyspeed.com/
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1991 banditt2 #130 of 600
Project 350 TPI Banditt II
http://www.street-dawg-racing.cityslide.com
www.gcfba.com (Greater Cincinnati F-Body Association)
http://www.cincyspeed.com/
TGO Supporter
Joined: Jul 1999
Posts: 10,907
Likes: 5
From: The Bone Yard
Car: Death Mobile
Engine: 666 c.i.
If you disable the EGR (or in the case of a Miniram which doesn't even have one), you must modify the eprom. Generally, we increase the "enable temperature" to around 150*C to ensure the ECM doesn't even try to turn on the EGR. There is also an "EGR Diagnostic Switch" which will turn off the SES code for a non-functioning EGR...but you have to do both in the eprom.
As the others said, there really isn't much of an advantage to diabling the EGR (if you have one). Disabling the EGR will keep the incoming air's temperature to be a little lower - but not enough to write home about. I think the other advantages of having a functioning EGR outweighs the small decrease in the incoming air's temperature.
As the others said, there really isn't much of an advantage to diabling the EGR (if you have one). Disabling the EGR will keep the incoming air's temperature to be a little lower - but not enough to write home about. I think the other advantages of having a functioning EGR outweighs the small decrease in the incoming air's temperature.
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