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EGR flow insufficient 2002

 
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alivegentleman
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PostPosted: Fri Nov 04, 2011 2:00 pm    Post subject:  EGR flow insufficient 2002 Reply with quote

Hi im new to this forum and hope somebody here will be able to help me.

I went to get gas and after i filled up the tank and started my car again suddenly the check engine light was on. I went to advance auto and it said EGR flow insufficient. The guy told me my EGR is electric and i should make sure that the hose or pipe or whatever is not just clogged before replacing the valve. Is this something i could do myself and is there any how to videos or anything for a car illiterate?

Thank you in advance
Andreas
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98ss
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2011 Chevrolet Silverado


PostPosted: Sat Nov 05, 2011 12:30 pm    Post subject:   Reply with quote

One thing you can do is seafoam the motor or you can unbolt the egr and try to clean it out with some carb cleaner, but in most cases the problem comes back. New egr's are about 80. The egr's get stuck because of all the carbon on them.
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alivegentleman
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PostPosted: Sat Nov 05, 2011 1:07 pm    Post subject:   Reply with quote

so you think i might as well just replace the egr? and do i have to replace the valve and the egr line? will i also need the gasket? and last but not least is this easy to replace or will i need a mechanic on this?
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UseAsDirected
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PostPosted: Sat Nov 05, 2011 3:59 pm    Post subject:   Reply with quote

Well, the problem doesn't come back because of the EGR valve itself; in other words if the one you have now clogs with carbon, a new one probably would too after a while. I would try cleaning it first. What engine do you have? You could probably keep the gasket (clean around that too though) if you're just cleaning it. If you decide to replace the valve then you'll replace the gasket too. It's easy enough to do yourself.

Edit - looks like you have the 3400 or 3800... either way, piece of cake.
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alivegentleman
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PostPosted: Sat Nov 05, 2011 5:41 pm    Post subject:   Reply with quote

I have the 3400. Well i guess i'll get my hands dirty and try to clean it. hopefully i won't break anything in the process. i wish there were how to videos to everything. Anybody know what kind of tools i will need?
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98ss
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PostPosted: Sun Nov 06, 2011 10:17 am    Post subject:   Reply with quote

Nope, just the egr. You will need a 13mm socket. Sometimes a magnet to grab the nuts.
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alivegentleman
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PostPosted: Sun Nov 06, 2011 1:23 pm    Post subject:   Reply with quote

ok thank you guys so much. one more question, how long can i just drive without cleaning or replacing it? don't really have the money right now and need to wait at least a week
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98ss
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PostPosted: Sun Nov 06, 2011 7:48 pm    Post subject:   Reply with quote

Basically your egr is stuck closed. You can wait a few weeks, it will just lean things out a bit, but your 02 sensors should be able to compensate for that. Not a huge deal.
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alivegentleman
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PostPosted: Mon Nov 07, 2011 11:54 am    Post subject:   Reply with quote

ok thank you guys
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chibiblacksheep
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PostPosted: Mon Nov 07, 2011 12:37 pm    Post subject:   Reply with quote

Did you remove the gas cap and put it back on?

Since you said it happened right after filling up, I would imagine it could just have been the gas cap that set off the code.

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alivegentleman
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PostPosted: Mon Nov 14, 2011 4:01 pm    Post subject:   Reply with quote

chibiblacksheep wrote:
Did you remove the gas cap and put it back on?

Since you said it happened right after filling up, I would imagine it could just have been the gas cap that set off the code.


Yes had the same idea too but i have filled the tank up again since then and it is still on.
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HotSauce6226
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PostPosted: Mon Nov 14, 2011 4:19 pm    Post subject:   Reply with quote

I have a egr vavle off a 3800.

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milwaukee_01impala
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PostPosted: Wed Nov 16, 2011 5:38 am    Post subject:   Reply with quote

i wish i wouldve seen this earlier.let me guess....p0401 code? if its that code im 99% sure its not the egr valve itself. i had the same issue with my 3400 a while back . http://www.naioa.com/v2/module.....mp;t=37556 there is a passage that goes into the upper intake manifold from the egr valve. its clogged. the best way to clean it out is by taking the upper intake manifold off. there is a small hole that comes into the bottom of the intake plenum. im betting thats whats clogged. i used a little bit of carb cleaner to loosen the gunk and used hot water to flush it out. and while i was at it i cleaned the rest of the upper intake out also. the runners were pretty nasty.
the p0401 code is egr flow insufficient. that basically means the egr valve is open like its supposed to be but there is no flow of air.

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