Wanted 80 Series EGR system

[ELSIE80]

I bought my new (to me) 97 LX450 a few months ago and discovered the PO had hollowed out the rear cat and removed the EGR system and pipe. I'm still not sure why people do this, or convinced it changes much, except he said it keeps from cooking the wiring harness in this area.

Needless to say, the damn thing won't pass CO emissions for NoX as a result and I haven't been able to get it plated, so I'm hoping someone out there is doing the delete and will sell me the pieces, or has a part out of some sort. Let me know! I need to put the system back together asap! Thanks!

 

[ELSIE80]

Adding some pictures so the experts can help me identify what I need.

 

[ELSIE80]

A couple more

 

[LC4LIFE]

Disabling the EGR can certainly add to increased NOX amounts, but there are guys that have passed after disabling the EGR, even in CO. How far off was it? Are there any other codes being thrown and is your ECM at ready status? Do you have the resistor in place of the temp sensor at the wiring harness?

 

[ELSIE80]

Disabling the EGR can certainly add to increased NOX amounts, but there are guys that have passed after disabling the EGR, even in CO. How far off was it? Are there any other codes being thrown and is your ECM at ready status? Do you have the resistor in place of the temp sensor at the wiring harness?

Well, the first thing to address is the hollowed out cat. I think I may be able to squeak by with just that replaced. But the emissions laws get more and more strict here every year, so I figure I might as well get what I need for the EGR and at least have it on hand to install if necessary. The reading (NOX) wasn't off by much the first time I tested, but the second time, I was running the AC and it jumped way up (won't make that mistake again).

No codes, but not sure what you mean by ECM at ready status, or anything about the resistor on the wiring harness. Please educate me!

 

[LC4LIFE]

Well, the first thing to address is the hollowed out cat. I think I may be able to squeak by with just that replaced. But the emissions laws get more and more strict here every year, so I figure I might as well get what I need for the EGR and at least have it on hand to install if necessary. The reading (NOX) wasn't off by much the first time I tested, but the second time, I was running the AC and it jumped way up (won't make that mistake again).

No codes, but not sure what you mean by ECM at ready status, or anything about the resistor on the wiring harness. Please educate me!

I didn't catch that the cat was hollowed out. Replacing it will help NOX, just not sure by how much. On the resistor - your engines computer looks for a certain value from the EGR temp sensor and yours appears to be cut. You must put a resistor in, in order for the computer to "think" everything is in place and okay. Without it, the computer will change certain parameters in how it manages the engine and you don't want that. The temp sensor is where the arrow is and there should be an unplugged, or at least something with a resistor in it below it connecting to the main harness.

 

[ELSIE80]

I didn't catch that the cat was hollowed out. Replacing it will help NOX, just not sure by how much. On the resistor - your engines computer looks for a certain value from the EGR temp sensor and yours appears to be cut. You must put a resistor in, in order for the computer to "think" everything is in place and okay. Without it, the computer will change certain parameters in how it manages the engine and you don't want that. The temp sensor is where the arrow is and there should be an unplugged, or at least something with a resistor in it below it connecting to the main harness.

View attachment 1788715

Sorry, just realized I hadn't mentioned anything about the cat in the OP. I edited to include that info.

I'll have to pop the hood again and see if I can find any sort of unplugged wiring below that area. Sorry again for my ignorance, but what sort of resistor would I need to apply to that wiring to bypass? Does the EGR temp sensor that's cut need to be replaced?

 

[LC4LIFE]

Check this out...EGR Temp Sensor Test Plug