EGR modulator, hole burned through it (2 Viewers)

[Cruiser804]

Anyone ever seen this?

 

[Cruiser804]

I was checking for a exhaust leak. I had occasional exhaust smell in the cabin. I was running a shop vac exhaust up the exhaust. When I got under the hood air was blowing out the bottom EGR port and the hose to the modulator was missing. This is how I found this.

Can't imagine anything in that part of the EGR system would do that. It's all vaccum, correct?

 

[Marvelicious]

I was checking for a exhaust leak. I had occasional exhaust smell in the cabin. I was running a shop vac exhaust up the exhaust. When I got under the hood air was blowing out the bottom EGR port and the hose to the modulator was missing. This is how I found this.

Can't imagine anything in that part of the EGR system would do that. It's all vaccum, correct?

I hate to tell you this, but your rig may have been infested by face-hugging aliens.

 

[dallen341]

Plugged Cats causing backpressure. Has to go somewhere and part of that somewhere is the modulator.

 

[Cruiser804]

Plugged Cats causing backpressure. Has to go somewhere and part of that somewhere is the modulator.

You'd think that would blow off the hose and maybe the modulator cap would come off. This looks like some sort of molten object blew out of it. It's definitely heat related.

 

[Nframe]

I’ve seen that reported before on this forum.

 

[TheBussman]

I've seen it on other cars of the era with similar EGR systems, they all had clogged cats.

 

[Cruiser804]

Oh boy. Ok.

 

[Cruiser804]

found these threads
Melted EGR Vacuum Modulator - https://forum.ih8mud.com/threads/melted-egr-vacuum-modulator.827784/

Melted EGR modulator

After a day of wheeling at The Badlands with the Hoosier Cruisers crew, my 1996 FZJ80 was running poorly on the way home. It had poor power and difficulty holding speed. Eventually a hissing sound came from under the hood. I pulled over thinking exhaust failure or vacuum leak. An under hood...

forum.ih8mud.com

Sudden power loss, melted EGR vacuum modulator

Last week, I was coming home from work, probably about 35-40 MPH on a moderate hill. Pulled out to pass a truck and tried to accelerate hard, and lost power in a pretty sudden & dramatic fashion - I think the car behind me had to hit their brakes. Could barely maintain about 25-30 mph. Got it...

forum.ih8mud.com

EGR Vacuum Modulator Meltdown following EGT Delete

93 FJZ80--LandCruiser-- Federal Spec So a couple of months ago I noticed that some vacuum hoses on my engine were cracked and coming apart. Who knows how long they had been that way. After researching I discovered that these were EGR vacuum hoses-- hoses that go between the EGR vacuum...

forum.ih8mud.com