EVAP PORT?...LOCATION??
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
You're barking up the wrong tree...
The EVAP system is not going to cause "lean" codes. You need to look for leaks in the intake system that allows air in after the MAF as that is the most common (but not only) fault.
Specific suggestions depend on what you have but you did not provide that info.
The EVAP system is not going to cause "lean" codes. You need to look for leaks in the intake system that allows air in after the MAF as that is the most common (but not only) fault.
Specific suggestions depend on what you have but you did not provide that info.
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5th Wheeling
Joined: Mar 2024
Posts: 29
Likes: 4
From: Illinois
...
I have a 2005 e250 5.4 2v...I replaced the intake manifold after the original failed and created missfire in cylinder 5....right next to leak.I never had a p0171 or p0174 code until after this manifold replacement. I have checked all the obvious culprits like ,vacuum hoses,elbows,egr tube.Cleaned maf sensor and pcv valve...my post was wanting to know where I would introduce smoke to system to check for intake manifold leaks?...I realize now that going thru evap port only checks leaks in evap system.Im thinking that I should push smoke thru throttle body and see if it leaks at sealing surface on heads..correct???
Hotshot
Joined: Jan 2004
Posts: 19,760
Likes: 1,079
From: St Louis
Im thinking that I should push smoke thru throttle body and see if it leaks at sealing surface on heads..correct???
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5th Wheeling
Joined: Mar 2024
Posts: 29
Likes: 4
From: Illinois
Hey SHO89!.. Thanks for ur input. Most grateful!....I'm thinking this aftermarket intake is leaking sumwhere....never had any problems with original intake(or any codes whatsoever) until the area around cyl5 where it failed and caused missfire in cyl 5....so I bought replacement intake from Rock Auto....cleaned and tested all injectors,new cops and plugs,All good for couple weeks then....p0171and p0174.....smoke machine is ordered,plus new gasket kit......lol.....THANKS BOSS!
These are a bigger Pia than the Tbird Turbocoupes.....don't get me going on those!!!!!!
These are a bigger Pia than the Tbird Turbocoupes.....don't get me going on those!!!!!!
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5th Wheeling
Joined: Mar 2024
Posts: 29
Likes: 4
From: Illinois
All that checked out good. I ran smoketest..it was coming out at elbow on rear of aftermarket replacement intake .
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