Blocking the EGR Valve

[OhBugger]

What does the butterfly do by the way? And why can you remove it without trouble when the EGR is blocked?

[Chomp]

Hi guys , I have a 04 zd30 and wanting to fit scangauge and Dawes valve while blocking my EGR where can I buy these???? Cheers

[threedogs]

Don't think the scanguage works on the Di Z30 only the later CR.
Check in archives via search engine top rhs.
I've just purchased a OBD2 bluetooth diagnostic thingy
Will be posting if works or not.

[P4trol]

What does the butterfly do by the way? And why can you remove it without trouble when the EGR is blocked?

I'm sure someone has a simple diagram of the egr system somewhere. I don't, so bear with me.

The idea of the egr is feed some of the exhaust back into the intake of the engine (normally clean air). In doing so it skips the intercooler (why?! Wouldn't it need a bit of cooling?) and goes straight into the engine. The butterfly valve blocks off the air from the intercooler, so the exhaust has preference to the good turbo air, in a way.

Since the ecu's controls the butterfly valve and egr valve, (and doesn't know when the egr is blocked) these valves will still go through the motions as required by the ecu. When the egr is blocked the butterfly valve isn't needed to stop air coming in via the intercooler. So the plate inside is taken out. (And the remains still work as requested by ecu).




Tipsy-tap

[OhBugger]

Thanks for clarifying!

[vk3mnm]

What a great read this thread was, just got a crd 07 model ordered the scangauge, got me convinced to do the mods to it reading this thread, also thinking of fitting the steinbauer chip, any suggestions of a good gauge set for the pillar pod for boost and temp?

Cheers Illya

[patrolrulz]

Hey this is great info is it pos to block the EGR on a 4.2 what will this do if anything to engine?

[the ferret]

It will give you a quicker spool up, while it also prevents all that carbon going back through the engine, hence, longer life.
Cheers, the ferret.

[patrolrulz]

Thanks the ferret your EGR plates will they fit the 4.2?

[threedogs]

Hi Ferret do you really need to clean all the gunk off? wouldn't it burn off?
or thats not possible with the EGR blocked bypassing it