[71Corolla]

You can't bypass the EGR system, the computer needs to see EGR flow or it will throw the CEL. Are you saying the EGR valve itself won't seal?

 

[71Corolla]

It is my understanding when you test the egr valve by directly pulling a vacuum you should see the valve raise and hold in position while under vacuum. Mine I have to continuously pump the vacuum to move the valve up as the vacuum leaks from the egr. I had it off the car so I know it is moving up under vacuum, just not holding it. I’m not interested in putting another $300+ for this part.

The valve should stay open as long as vacuum is applied. Are you in California?

 

[71Corolla]

The root of the question: is there any way to repair the diaphragm...

Don't know of any way to repair the diaphragm. Salvage yard part.

 

[71Corolla]

Yep it's a big chunk of cast iron.

 

[71Corolla]

Thanks for the reply. I blocked off the egr and put a 10Kohm resister between the two temp sensor wires and no more code 71 for the egr! Car runs just fine.

Cool. Glad to hear the ECU is not smart enough to know the difference.

 

[71Corolla]

I always wondered if it it checked the EGR temp when EGR wasn't commanded on. My CA emissions 4-cylinder would only throw the 71 code every 2-4 weeks, so I would just check and reset it when it happened... (blocked EGR at manifold) It would also throw cat codes too, since I was running without one.

-Charlie

2-4 weeks? Damn, that means the 2VZ might throw codes at some point.