As stated above, I have a 2006 LR3 V8 HSE with a vacuum leak. After a smoke test, I was able to pinpoint the area of the leak. Smoke comes out of the top of the EGR valve. I removed the valve and ensured it wasn't stuck open or closed.
Question, is the EGR valve supposed to let vacuum through it? I don't think so. Could there be a crack in it? Trying to get some insight before I spend $240 on the fix.
54 views and no thoughts? One of you must have done a smoke test to identify a vacuum leak. Did smoke come out of the erg valve between the electric solenoid on the erg valve and the part where the coolant runs through it?
I just did a smoke test and found 2 leaks I had the code for P0171 bank 1 lean , replaced front O2 sensor then cleaned back sensors , replaced spark plugs and coils , etc all of which it needed anyway it helped ,but I have a intermittent code for bank one and it will miss fire under the right load also . Sometimes runs perfect. anyway did a smoke test . 1 leak was easy around the bottom of the oil filler cap tube. Replaced O rings 2nd leak is around the EGR valve solenoid. I thinking of just doing a block off plate between the EGR and the solenoid . Has anyone been able to link this small vacuum leak to driveability issues ? and I see this post was April 2018 what was your outcome ?
update I just made a EGR block off plate and installed it, vacuum leak fixed !
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