Blockin off egr???

[Stevejr]

How much mileage can I expect to lose? Is all I have to do is block off the hole in the header and the egr valve?

 

[HISSIN50]

This can lead to detonation at part throttle.

 

[Stevejr]

Is this gonna hurt anything?

 

[derrick2119]

You need to block off the hole in the header and get an egr block off plate for the back side of the intake manifold.

 

[HISSIN50]

Doing this removes the spent gasses from the chambers at cruise. Exhaust gasses are inert, allowing more timing and less fuel. If you remove the exhaust and the EEC doesnt know about it, you can see part throttle pinging. This is not good. One way people get part throttle pinging is because the EGR passages get clogged, and that's what you'd be doing with a block-off plate.

 

[Stevejr]

I have it capped at both ends for now, what else do i need to do?Thanks

 

[HISSIN50]

I have it capped at both ends for now, what else do i need to do?Thanks

If you can log a hard EGR fault code, the EEC might turn off the EGR function (you'd have a CEL unless you trick the EEC to turn it off). Or get a tune/TwEECer to turn off the EGR function.

 

[Stevejr]

How do I log a hard erg code? I havent looked is there any wires I can unhook to help?

 

[99FiveOh]

Bringing this back from the dead since the last question was never answered, I too am experiencing pinging with my EGR blocked off and 10* timing.

It's funny how foxes never seemed to have this problem with thier "ancient" engine management technology! 200K mile foxes purring like kittens and no pinging in sight, and that's with 14* base timing!

 

[HISSIN50]

One way to get pinging is to block the EGR passageway but leave the rest of the system functional.

If you have an EGR code stored KOER/continuous, the EEC should have shut the EGR off. How one accomplishes this varies on the combo, what's convenient, etc.

 

[99FiveOh]

So what happens when I unplug the EGR completely? Will the car richen the mixture?

 

[HISSIN50]

If a hard (constant) EGR code is logged, the EEC should shut off all of your EGR function. HOw you do this depends upon what's left in the car.

I'm not sure what "disconnecting the EGR completely" means. With the easiest method, you want the position sensor still connected so it can tell the EEC that even though the computer is commanding EGR function, the EGR is not opening. Disconnecting everything should work but it will spew more codes.