I know it's an old thread, but tagging on here and hopefully someone can help. I've also got an issue with smogging a 2.6. Mine's a '92.

The numbers are good for my smog, but it failed due to an EGR issue. Basically, it's not passing gas. The tech took a vac pump to the solenoid and the diaphragm moved, so I don't think that's the problem.

Here's where I am with my troubleshooting (all done idling):

I pulled some hoses to see if I can tell where the holdup is. There is no vacuum at the solenoid, but there is vacuum at the relay just after it. I swapped the electrical connectors to the identical relay that is just next to it, and there was no change. I'm not sure if these should be open during idle, so I'm not sure if this should have changed anything.

Please advise as to what I should be checking next.

Thanks.

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