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Old February 15th, 2011, 02:08 PM   #1
Ready4Wheelin
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Default Can I get away without running an EGR valve on a TBI 350?

I've got an 89 TBI 350 that needs an EGR valve. Been driving it for a month or so now with the vacuum line to the valve plugged and solenoid harness unplugged and it runs great. I used to run some of my carbed engines with an EGR block off plate, so I'm wondering if I can do the same to this engine? I see on the Jegs website they even make block off plates for LS series engines as well.
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Old February 15th, 2011, 02:56 PM   #2
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yes you can run a block off plate on them. i did it to mine and did not have any problems. matter in fact it seemed to run a little better.
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Old February 15th, 2011, 03:19 PM   #3
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Yes. Those engines were never originally designed to run an EGR system. The EGR system was just an add-on to pass emissions. It isn't like modern engines that will not run right without them. Your engine won't know the difference.
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Old February 15th, 2011, 03:21 PM   #4
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Yes. Those engines were never originally designed to run an EGR system. The EGR system was just an add-on to pass emissions. It isn't like modern engines that will not run right without them. Your engine won't know the difference.
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Old February 15th, 2011, 08:02 PM   #5
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Thanks guys, I was pretty sure I didn't need it. GreaseMonkey, I can believe that, due to the fact that there's no other emissions crap on this truck anymore. FWIW, this truck has 225,xxx on it. It popped a head gasket about 100k ago, and while I had it apart, I swapped in a bigger yet streetable cam, 3 angle valve job, new valve guides/seals/springs, port/polish heads & intake, and topped it off with the larger Edelbrock TBI unit. Truck runs great for the miles, pretty fun for an old 3/4 ton Sierra!
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Old February 15th, 2011, 08:12 PM   #6
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Originally Posted by GreaseMonkey View Post
Yes. Those engines were never originally designed to run an EGR system. The EGR system was just an add-on to pass emissions. It isn't like modern engines that will not run right without them. Your engine won't know the difference.
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Did the same thing on my old 91, kept throwing a code and I put a blocking plate on, ran great (didn't really run better, but didn't have any problems, and no negative effect to fuel economy )
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Old February 15th, 2011, 08:15 PM   #7
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I've got an 89 TBI 350 that needs an EGR valve. Been driving it for a month or so now with the vacuum line to the valve plugged and solenoid harness unplugged and it runs great. I used to run some of my carbed engines with an EGR block off plate, so I'm wondering if I can do the same to this engine? I see on the Jegs website they even make block off plates for LS series engines as well.
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