EGR needed on a '99 Vortec 350? - Pirate4x4.Com : 4x4 and Off-Road Forum
 
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Old 08-07-2006, 03:36 AM   #1 (permalink)
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Exclamation How to plug the EGR on a '99 Vortec 350? Updated!

Update:
I had the computer flashed to eliminate the EGR (see the original question below). Now I want to plug the EGR hole with a block-off plate I ordered, but what about the 'hose' from the exhaust manifold to the intake? I put on a set of Ram-horns that eliminated the the hose on the exhaust side, but the intake needs to be plugged also (I assume). I went to a hardware store, and I am not finding a pipe-thread plug the same size.
Is it NPT?
What is everone using to plug it when they eliminate it?

I have searched and found alot of mixed responses on EGR elimination and most threads are for toyotas or older TBI motors.
Here is my dilema. I have a '99 Vortec 350 that I am installing into my CJ. I want to put some ram-horn manifolds on it for exhaust clearance, but they do not have a place for the EGR hose on the driver side like the factory manifolds did. So I have heard of people blocking it off and some say "great, no problems" and some say "it will throw codes, cause a lean condition, knocking, and so on".

Does anyone have any real world experience on these motors?
What needs to be done to do eliminate it 'correctly'? Block off plate on intake?
Does the computer have to be reprogrammed?

I do not have emmissions here and this is a trail-only rig. Thanks.
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Old 08-07-2006, 08:10 AM   #2 (permalink)
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just block it off on the intake side. I have done this on two vehiclews and you won't even have to have the computer reprogramed unless the engine is a 98 or newer. Then you have to have it reprogramed for anti theft.
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Old 08-07-2006, 09:14 AM   #3 (permalink)
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Quote:
Originally Posted by Woodlee
just block it off on the intake side. I have done this on two vehiclews and you won't even have to have the computer reprogramed unless the engine is a 98 or newer. Then you have to have it reprogramed for anti theft.
It is a '99 motor with a '96 computer (done this way to eliminate the anti-theft sensor).
I would like to use my check engine light on this motor if possible, but if it is throwing a code all of the time for the blocked off EGT, it may not do any good anyway (unless I reprogram).
It may be throwing a constant code for the auto tranny (that is no longer there) also?????
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Old 08-07-2006, 10:47 AM   #4 (permalink)
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it almost definetally will throw a code for circuit malfunctions of the various trans pieces. Just get someone to reprogram like Westers or a similar shop. They will be able to get you a little more power, response and all that while getting rid of your worries. I doubt you are going to run 4 oxygen sensors either, that will trip check engine light as well.
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Old 08-12-2006, 10:16 PM   #5 (permalink)
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Update:
I had the computer flashed to eliminate the EGR (see the original question below). Now I am going to plug the EGR hole with a block-off plate I ordered, but what about the 'hose' from the exhaust manifold to the intake? I put on a set of Ram-horns that eliminated the the hose on the exhaust side, but the intake needs to be plugged also (I assume). I went to a hardware store, and I am not finding a pipe-thread plug the same size.
Is it NPT?
What is everone using to plug it when they eliminate it?
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Old 08-12-2006, 11:47 PM   #6 (permalink)
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ram horns from an 82 corvette have a threaded piece just like the one used for the vortec egr. you could try that or you could sacrifice your egr tube and have someone weld it shut. a welder that is good at tig welding can seal it up good and tight for ya.

JJ
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