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07-08-2012, 04:49 PM #1
Plugged a Bad EGR. What can this cause.
i plugged a bad egr because it was causing my stalling. i plugged it and the ol 350 tbi runs like a dream. But being theres a code lit for a egr code. what can this code cause. mpg change,timing change,power loss etc. i plan on putting a new one on soon though. but will it harm my 230k tbi. it runs so well for its age.
07-08-2012, 08:33 PM #2
The computer looks for a change in RPMs when it cycles the EGR and if it does not see it for a number of times it will set a code for an egr malfunction. As far as changing how it operates the engine: I believe it will make no differencein the items you are asking about,. I made a plate to eliminate mine and had no problems and also plugged the exhaust and removed all traces of the EGR.2000 GMC YUKON SLT, 5.3L tow pkg, G80 rear/w 3.73 gear
07-09-2012, 05:27 PM #3
i have read of people using plates to block them off. so basically it just makes a code then? ive had the egr malfunction code on since i unplugged vac line and capped it off. i just was making sure im not going to carbon up the intake from not having a egr to evacuate properly. ill replace when it gets cooler out. 105 here.
07-23-2012, 03:12 PM #4
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Josh, what's the specs on the truck you did this to?1992 GMC Sonoma GT 4.3
1984 C20 'burban 454
1963 C10 283
One lead foot
Two hands that turn a steering wheel very quickly and very well.
07-23-2012, 05:53 PM #5
Well its a stock 350 tbi. Its a 94 z71. Has 4l60e. Engine is 231k now still runs like it was new starts at the bump of a key. Holds a good 45 psi of oil pressure. I run a 170 deg. Thermostat. Aswell. I like my engines cool and I use 10w-30 conventional valvoline always with a wix filter. Engines quiet as a mouse. Egr still plugged. It had a vac leak coming off accel. Not a problem since. I also change oil around the 2500 mile interval. My way of seeing things is change oil before its dirty. Then your engine wont ever GET dirty. I must be doin something right
08-14-2013, 07:30 AM #6
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Main cause of EGR valve bad is buildup of carbon, soot and other deposits and heat, which causes metal like springs to break or lose strength.
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