Can I get away without running an EGR valve on a TBI 350? - Great Lakes 4x4. The largest offroad forum in the Midwest

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Old February 15th, 2011, 03:08 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, 03:56 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, 04:19 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, 04:21 PM   #4
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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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Old February 15th, 2011, 09:02 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, 09:12 PM   #6
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Quote:
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.
x3!

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, 09:15 PM   #7
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Quote:
Originally Posted by Ready4Wheelin View Post
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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