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P0400 Exhaust gas recirculation flow


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There are ways to test the EGR. Check this vid out https://www.youtube.com/watch?v=iT8Iww44nZM  it's for a Vette, but testing should be the same. High quality and he explains in detail with EGR off the car while actually testing it.

I'll check the hoses and pull out the EGR in the next few days and see if it holds pressure just like he showed. I have a feeling the diaphragm is shot after being in use since 1997!

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Hey guys, it turned out to be the hose from the EGR valve to the solenoid had popped off on the solenoid side. The hose was loose and tired so I cut off the end and plugged it back in so now it’s nice and tight. Sorry it’s not something more involved but thank you for the help!

Edited by bstone
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