How to Test an EGR Valve

I have '95 Roadmaster that is having a little trouble passing NOx. W/ the EGR off the car I can hand vacuum pump it up and it holds as well as when I place it on the car. But, when I let the car idle it wont pump up w/ the hand vacuum. Is there something going on in the intake for this odd behavior? I cleaned the EGR w/ Seafoam before. Thx

I have one that looks like the top and inside is a rubber seal that's ripped. How can I replace that rubber seal inside the round part on top of the EGR you showed in the video.

simple and clear, nice!

Appreciate the video! My EGR is a PITA spot on my wife’s 06 Altima…if I have to pull it off just going to replace it!

Thank you for your help!!

Does the high heat damage the rubber rtv?

Need some guidance here, I did a smoke test for vacuum leaks on my Ford and one of the places smoke was coming from was the vent holes on the bottom of the diaphragm part of the egr. The smoke isn’t coming through the little vacuum line though, because that still holds vacuum and opens and closes the egr properly. The smoke is coming through the intake side of the egr. Further investigation showed that I could suck a decent amount of air through the egr even when it was closed. Anyone know if this is supposed to vent this way? Any guidance or advice would help alot

I would never trust a mechanic that installed parts with an impact wrench.

So why did you put it back on if it was bad

If it doesnt hold a vacuum then you wont get soot in your intake.

Thanks! My ranger is throwing a 0401, since my EGR valve is good idk what else it could be

I have to join those that aren't sure if the EGRis good or bad ... won't hold vacuum tells me it's bad, why reinstall????

Wear is the EGR on kia carens 2

My 96 f150 302 (5 L) EGR valve holds vacuum extreemly well but applying vacuum does mot move the pintel valve. The valve is not showing carbon and moves freely with light hand pressure using a punch or screwdriver. As though tne valve is detached from the diaphram. ???

You guys are awesome thank you for your knowledge

Is it good or bad? DECIDE!

If it's not hold a vacuum, then why bolt it back on?

The rubber diaphragm is probably shot and needs a new egr valve as it won't hold vacuum.

Oh boy. Lol It's not holding pressure throw it out.

I HAD A SMOKE TEST RUN ON MY ACURA TL TODAY ON THE EGR AND SMOKE WAS COMING OUT , DOES IT MEAN I HAVE REPLACE THE EGR OR AN I CLEAN IT

can a bad egr valve cause black smoke to come out of muffler

i love being the only person that disliked this video. i like being an arse sometimes.

okay so its a bad valve because it doesnt hold vacuum, but because it only leaks fluid when the vacuum is applied its good?

Was the vacuum test failure not enough to justify replacement of the part, or was the fact that it held liquid until vacuum was applied enough evidence to reuse it?

Thank you for your help and putting your ability in solving a problem. Very good video *** 5 stars. Keep up the good work. God bless you.

hi, can an egr valve on a 642 motor cause it to blow white smoke at low temperature

Can one of those same valves cause a Kia sportage to loose oil