turn the shop vac on and hold hose over egr port- insert wire hanger and jab away

you have a vac leak
this happens sometimes: the very top cover gasket- if you lay it on the engine side it lines up all the holes and ports
except its upside down
Must match it to the top cover side- or a port on it gets blocked and screws the car up!
pull that top cover before you think its other parts

its best to remove any sensor from the manifold- they are used to gas and air- not water

always suspect the last work on the car when a new problem occurs

you used what torque on TB to manifold and intake to engine?
and verified the torque reading before use?

do some seafom thru the manifold vac port- help that loosened carbon and crud get out safely

99 manifold, you OLD F*** :tongue: lol,

but yes you have to look closely when a new problem comes up, after being worked on

Hi guys,

I think I have fixed the problem already. I made a very stupid mistake. I didn't realize the EGR gasket has three layers (sandwich). I removed one layer and then saw the middle metal layer, so I thought that was part of the EGR valve, put a new gasket on that directly. Until yesterday when I was trying take apart the EGR valve and found some bolts were blocked by something, I pried it and found that it was gasket. So I removed the gasket and cleaned the surface really well and put new gasket. Everything is fine now. There is no pending code anymore.

After that, I did a seafoam but the smoke was not terrible at all may be because I cleaned the manifold and TB too well. :)

Thank you all very much for your help!!!

-mm

:thumbsup:, and we had asked you if you made sure to clean the mating/sealing surfaces really well :shakehead :rolleyes::tongue: