How to Test an EGR Valve?

[Gus_hauler]

Is there a way to test an EGR valve to ensure it is opening all the way? I've been researching an issue with my engine and it sounds exactly like a stuck EGR valve issue. So I pulled mine out, but it was SUPER clean. I'm wondering if the solenoid just isn't working right anymore.

Anyone else ever have a stuck EGR valve? What were your symptoms?

Thanks,
George

[a2elvis]

What are the symptoms? I might be able to help...

[Gus_hauler]

Especially when the engine is cold, but sometimes when the engine is warm, when driving at part throttle, say 35 - 45 MPH, the engine feels like it misses, or studders. Going up a hill will exaggerate the issue.

Like I said, I pulled the EGR valve thinking that it was gunked up, but other than a light coating of soot, it was clean. With a screwdriver I can push the valve down, and it pops right back up. When I tune the unit over, I hear something shake inside.

Also, I did find the bottom o-ring was somewhat decayed.

I've got a new o-ring kit on order at my nearest International Dealer. Which is actually closer than my Ford dealer! But the new O-Rings won't be here till monday.

[a2elvis]

Just my 2c but you can eliminate the egr valve being the issue by unplugging it then test drive. If the problem still occurs then you can be pretty sure that it is not the egr valve that is the issue.

Furthermore, if it was the egr valve being forced open causing a miss it would blow black smoke and kinda chug. If thats the case then the engine is overboosting and the turbo needs to be cleaned.

[Gus_hauler]

I will have to try that tomorrow. Would a leaky o-ring allow exhaust gas into the intake when it's not supposed to, and thus cause the stumble? If so, even if I put the EGR back in disconnected, if the O-Ring is the culprit, the problem should still show up. Right?

[Gus_hauler]

Maybe I should ask this, if anyone else has removed their EGR Valve, when you turn it over do you hear something moving around inside?

[a2elvis]

Originally Posted by Gus_hauler

Maybe I should ask this, if anyone else has removed their EGR Valve, when you turn it over do you hear something moving around inside?

Yes it will make noise...

[Gus_hauler]

Damn. Well, I guess I just have to hope the o-ring was the issue. Otherwise I'm thinking I'm going to be getting into big $$$.