EGR valve
EGR valve Anyone else have to replace one from failed smog test? The guy said it was either the valve my cat. Just wondering what would be more likely the cause since neither of them is a cheap fix. Thanks
On The Tree
Joined: Feb 2007
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Maybe stuck, pull the egr valve off the back of your intake, it is 2 thirteen mm bolts, and stick in a small screwdriver, maybe some passagesw are blocked withb soot, then take the tube off right next to it as it comes up the exhaust manifold to the back of the intake, and check your passages on the back of the intake too for any carbon. It sounds like it is closed if your nx levelsb are to high, also check the seliniod to make sure the vaccum action is working, I am pretty sure it is run off the computer. I had the same prob too about 3 years ago too so I had to go through all the same stuff. Short hopes don't get everything burned off like a good long everyday drive does.
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Hopefully it's just that. I need a passenger cat and the direct replacement is 456 and the weld in is 300. I hate Cali smog for the price of two cats I could have a real nice SS longtube set up
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Verdad Gallardo Got the car smoged today with the new egr valve. According to the smog tech it was better but it still failed the 15mph test but passed the 25mph test. Looking at previous smog checks in 2006 & 2008 my car roughly put out the same amount of NO (PPM) amounts that it did today.
in 2008 (Bone stock)
15mph Max 689 Ave 150 Meas 576 pass
25mph Max 706 Ave 136 Meas 530 pass
In 2010 (See sig, ls1 lid replaced with factory+ New EGR valve)
15mph Max 483 Ave 268 Meas 589 Fail
25mph Max 494 Ave 250 Meas 471 Pass
Because California Lowered their emissions it seems that my car would never pass smog bone stock or not and spent 100 bucks for a new valve that wasnt the problem.
in 2008 (Bone stock)
15mph Max 689 Ave 150 Meas 576 pass
25mph Max 706 Ave 136 Meas 530 pass
In 2010 (See sig, ls1 lid replaced with factory+ New EGR valve)
15mph Max 483 Ave 268 Meas 589 Fail
25mph Max 494 Ave 250 Meas 471 Pass
Because California Lowered their emissions it seems that my car would never pass smog bone stock or not and spent 100 bucks for a new valve that wasnt the problem.
I haven't tried it but have friends that have, But the parts store sells the stuff you put in your tank that lowers the emissions. Might try that seeing that it is real close, I just cant remember the name of it right now
I did the EGR test where if you open the valve the car bogs down. Now I just need to check if A) the silinoid isn't opening the valve B) I'm not getting enough vacuum to control the silinoid or C) it's actually my cat that isn't doing it's job.
okay yesterday the guy told me to come back since his technician (if you want to call him that, I wouldnt) would be there. puts it on the dyno again to test it, fail yet again but this time it seems its getting worst. to make this better the so called tech said that he doesnt know why its doing it but to take it to a place to get fixed then bring it back. Now since it could be my tuned computer can a company like pcmforless or someone tune a car computer so it will pass emissions with flying colors?
I would try getting it up to temp somehow and retest it. I think the main reason the stock program didn't turn the fans on until 225* was to pass emissions.
