2000 GMC Sierra EGR

BIG J TRUCK

MEMBER
2000 GMC SIERRA
4.8L
V8
4WD
AUTOMATIC
100,000 MILES

Just want to know an egr blanking plate cause any engine damge as my eger is no good at the time being and I do not. Have 500 dollars saved up for a new one I do not have smog test where I am will this cause engine damage for a short time till I save up the money

4 Replies

TY ANDERSON

MECHANIC
719 POSTS

An EGR is there for a reason. The biggest is to reduce emissions and improve engine breathing (at under certain conditions). If your engine runs lean the egr lowers the combustion temperatures and prevents pre-ignition (air fuel mixture explodes before the spark does the job). Pre-ignition will damage your engine especially at higher engine speeds.
If you are going to plug off the egr port maybe punch a small hole in the plug about half the size of the port in the intake may help to get by. But replacement is preferred and not illegal. Tampering with any emission components is a federal offense as I'm told in the western united states.
Hope this helps

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Tuesday, December 3rd, 2013 AT 7:14 PM

BIG J TRUCK

MEMBER
5 POSTS

Well I am in. Ontario and no smog tested needed so your laws will be diffrent then mine. Beside that this truck is not on the road its only used for sled pulling competions so emissons don't mean much when your pulling will it or will it not cause damage it is. A positive egr

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Tuesday, December 3rd, 2013 AT 7:29 PM

KEVIN GODWIN

MEMBER
53 POSTS

Blocking egr will not cause any engine damage at all sort term or long term. The egr valve lets exhaust gas into the cylinders only at cruise conditions to lower the engines displacement when it is not needed. When pulling sled it will not use the egr even if it was there

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Tuesday, December 3rd, 2013 AT 7:48 PM

BIG J TRUCK