Is it ok to replace my EGR valve with an aftermarket part (Autozone/Duralast)? I know the DFPE valves need to be from Ford, but is the EGR valve replacement as critical?

 

Seldom dose it ever need replacing.
How have you proven it needs to be replaced?
Good luck.

 

I'm getting a P0401 code on a '97 4.6L with 186,000 mi, and vacuum testing the EGR does not cause engine to stumble, so I found the EGR ports blocked with carbon. While taking all that apart, I found that the previous owner had mangled the bolt that holds the EGR valve on the throttle body. It had broken off, and had been sort of JB welded back on. A washer was involved. Its just a mess with basically only one bolt really holding it on.

If I can be OK with an aftermarket EGR valve, I can get one for about $50 that will be easiest. If I have to go with Ford, I'll probably just work on fixing the messed flange on the EGR valve that's on there. So that's why I was checking to see if the Autozone valve would be OK to use.

 

I have not saw any replies on EGR valve failures not to say there are none.
Here is some background on the EGR system and test failures.
When the computer calls for a system test of flow, it opens the EGR a 'controlled' amount.
For this, an expected flow rate/pressure is expected to be measured by the DPFE across an orifice in the metal tube.
The limits for these test are set quite narrow .
You can see the DPFE if faulty or does not perform to OEM specs can result in a test failure even if the flow is proper.
The EGR hardware valve has a spring loaded diaphragm.
If this calibration is not to original OEM design spec for controlled opening it can result in a test failure.
The more you know the better you can make judgment about these things.
Good luck.

 

Bluegrass, I think he means the valve is physically broken from a botched previous repair attempt. An aftermarket valve will work just fine.

 

Thanks. I got one from AutoZone, and it seems to be working ok now.