1996 Nissan Altima
oldcars_75633
09-22-2004, 10:04 AM
Our Altima has an error code of PO400 which states "EGR flow Incorrect". Does anyone know what exactly does this mean? Is the EGR valve gone bad or does it mean that something is hooked up wrong? Also, should it be a hose connected wrong the does anyone have a diagram to put the hoses back correctly. Thanks
My fault but the code of PO400 states "EGR flow malfunction" instead of Incorrect. I also have cleaned the line and replaced all the hoses. I have vacumn from the engine to the throttle area but I have no vacumn on any other hoses. Still open for suggestions. Thanks
My fault but the code of PO400 states "EGR flow malfunction" instead of Incorrect. I also have cleaned the line and replaced all the hoses. I have vacumn from the engine to the throttle area but I have no vacumn on any other hoses. Still open for suggestions. Thanks
sidzorn
09-23-2004, 09:14 PM
there is a little metal line with a rubber hose replace the short rubber hose and clean the metal line out
mikenearmilwaukee
06-21-2005, 06:39 AM
there is a little metal line with a rubber hose replace the short rubber hose and clean the metal line out
I have the same code on my CEL. .... There are 4 "metal" tubes coming out of the EGR itself... Cleaning them all would be near impossible. Unless you can lay across your engine, or some how contort yourself under the damn thing... The biggest problem I ran into was getting to everything. I would recomend checking/replacing the selenoid. If you get vacum there before that, Id say thats it, seldom will a vacum hose have 0 vacum, you should feel it at the EGR. Even a little... If you reach around the top "cone" of the egr you will feel a rubber/plastic part... This moves up and down with the RPM, at about 2k you should feel it shoot up fast, and thus open the valve. When the engine slows down you can feel it sit back down, check for debris around the lip of that rubber gasket. A leaf was stuck in mine. One of those "helicopters" from a mapple tree. email me if you want, I can walk you through all of that. [email protected] GL.
I have the same code on my CEL. .... There are 4 "metal" tubes coming out of the EGR itself... Cleaning them all would be near impossible. Unless you can lay across your engine, or some how contort yourself under the damn thing... The biggest problem I ran into was getting to everything. I would recomend checking/replacing the selenoid. If you get vacum there before that, Id say thats it, seldom will a vacum hose have 0 vacum, you should feel it at the EGR. Even a little... If you reach around the top "cone" of the egr you will feel a rubber/plastic part... This moves up and down with the RPM, at about 2k you should feel it shoot up fast, and thus open the valve. When the engine slows down you can feel it sit back down, check for debris around the lip of that rubber gasket. A leaf was stuck in mine. One of those "helicopters" from a mapple tree. email me if you want, I can walk you through all of that. [email protected] GL.
op012503
06-24-2005, 04:59 PM
what would happen if you got rid of the egr system. As i understand it the egr cools the cylinders by blowing hot air throught them from the exhaust manifold. This doesnt sound like a good idea to me? Thoughts?
mikenearmilwaukee
06-24-2005, 05:35 PM
I think that would be bad... :O Although mine hasnt funtioned at its peak in over 6 months. All I really notice is a little less gas milage, maybe a little less horse power but who knows... Damn American emmissions... we should move to some turd country where they dont know what an EGR is... But yeah, I wouldnt just go taking things out willy nilly...
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