Disable the EGR system the (mostly) Toyota way

[trapper92]

I'm sorry..that's not the 3FE...the pic is very small on my Iphone...haha..
Yes that line goes through the manifold to the VSV. Just leave it as is it doesn't matter.

 

[alaskacruiser]

OK so in order to disable the modulator, an alternative to capping off any TB ports is simply swapping the lines from the modulator to the TB?

 

[Ebag333]

Pics are up.

They're not as good as I had hoped. I really need a macro lens for my camera.

Anyway, I think it'll make a little more sense now. I hope.

Thanks for your patience.



The next thing I'm going to test is if applying just the open loop circuit completely disables the EGR system.....

 

[CreeperSleeper]

Well now you've confused me more... Just come over and do it to my truck.

 

[Ebag333]

The redneck guide:

1. Unplug the temp sensor.
2. Take a paperclip.
3. Stick one end of the paper clip into the plug (ECU side, not sensor side).
4. Stick the other end of the paper clip into the plug. (Other open hole.)
5. Duct tape in place.
6. Step #6.

 

[Kaoscruizer]

The redneck guide:

1. Unplug the temp sensor.
2. Take a paperclip.
3. Stick one end of the paper clip into the plug (ECU side, not sensor side).
4. Stick the other end of the paper clip into the plug. (Other open hole.)
5. Duct tape in place.
6. Step #6.

NOW I understand!

 

[CreeperSleeper]

So does that mean you won't do it for me?!?

 

[Ebag333]

I will next time I go through Portland if you want. Just dunno when that is gonna be, probably not for a while.

 

[CreeperSleeper]

I'm just giving you crap... But you better let me know the next time you're in my area! LOL

 

[Ebag333]

Not for Crusin' the Woods unfortunately. Can't get the time off.

When are you coming down next?

 

[CreeperSleeper]

As soon as I can find the money...

 

[alia176]

The redneck guide:

1. Unplug the temp sensor.
2. Take a paperclip.
3. Stick one end of the paper clip into the plug (ECU side, not sensor side).
4. Stick the other end of the paper clip into the plug. (Other open hole.)
5. Duct tape in place.
6. Step #6.

:

It's interesting that by doing this why the CEL is not coming on The ECU is not getting what it wants as a feedback.

Thanks for the detailed explanation, this worked well for me.

 

[Ebag333]

It's interesting that by doing this why the CEL is not coming on The ECU is not getting what it wants as a feedback.

The ECU must be getting what it wants or else it'd throw a code. If you reset the ECU, it'll (eventually) mark emissions as good. If it was getting something out of spec it'd either:

A) Throw a code
B) Never mark emissions as ready

My guess is that Mr. T wanted a quick and easy way to disable EGR for non-Kali spec trucks. It'd be childs play to program the ECU to accept an loop as disabled.

The opposite is not true. If you have a too much resistance or no connection at all, it'll throw a code (insufficient flow). If you have some resistance (but not enough to be in spec), it'll throw a code (too much flow). If you have no resistance, but the wire is connected in a loop, then the ECU is happy.

 

[medtro]

Evidentially, for ODB-1 and ODB-2 trucks there is a very easy way to disable the EGR system. Create an open (continuous) loop on the EGR temp sensor circuit. No resistor needed. Here's how I did it on mine.

The redneck guide:

1. Unplug the temp sensor.
2. Take a paperclip.
3. Stick one end of the paper clip into the plug (ECU side, not sensor side).
4. Stick the other end of the paper clip into the plug. (Other open hole.)
5. Duct tape in place.
6. Step #6.

You simply bypass the temp sensor, correct?

To me, the words "open (continuous) loop" is very confusing. I thought you meant open circuit at the beginning, but then I have a hard time understanding an open circuit that is also a continuous loop.

 

[Ebag333]

You simply bypass the temp sensor, correct?

To me, the words "open (continuous) loop" is very confusing. I thought you meant open circuit at the beginning, but then I have a hard time understanding an open circuit that is also a continuous loop.

Yeah, I actually shouldn't use the word open.....

Yes, you're simply bypassing the temp sensor.

 

[alaskacruiser]

Any updates on disabling the modulator, Ebag333?

 

[alaskacruiser]

bump.

 

[Ebag333]

Whoops, sorry, didn't mean to let this sit this long.

Still no CEL. Still drives fine.

 

[NLXTACY]

I am *thinking* about doing this. I need to leave everything as is so I am contemplating just dropping a BB into the vacuum lines as needed and calling it done.

 

[IdahoDoug]

Sweet. No CEL - that's what I was waiting for. When you're a technical guy like me, the last thing you want to be doing is driving a vehicle around with the light on. I'm going to do this next week.

DougM