Blocking the EGR Valve

[BigRAWesty]

EGR is controlled by TPS not RPM.

I used to drive my 07 CRD thru the gears relatively hard IE give it a bit of welly and changing at 3500 to 3750 give or take.
I find most CRDs like to get up to cruise or speed limit fast then back off and just tonk along.
It easily got the best fuel economy doing this around town rather than driving Miss Daisy which returned crap figures
IMHO if you have a high TPS that probably holds the EGR shut thru the gears as you accelerate.

Well there ya go.
So flat to the floor is better

[the evil twin]

Well there ya go.
So flat to the floor is better

For me yeah... I edited my original post as I shouldn't have used the term TPS
There are several parameters involved

[togenshi]

EGR is controlled more by Throttle than RPM.

Pretty much. It is open quite often than not. If you are driving sensibly, it would be open for majority of the time.

[Wine_maker]

One more useful drawing of EGR block plate for rd28t

c8337fu-960.jpg

[Tico_Y61]

Very useful thread... Thanks a lot guys.

[togenshi]

Anyone else took the swirl valves out when they blocked the EGR and cleaned their intake manifold? FYI Swirl valves are there to manage the mix of EGR and intake gases. I want to know if its more responsive and feels like there is more torque than stock. I think I might have lost some torque at the 1,000-1,500 rpm mark though.

[mudski]

Anyone else took the swirl valves out when they blocked the EGR and cleaned their intake manifold? FYI Swirl valves are there to manage the mix of EGR and intake gases. I want to know if its more responsive and feels like there is more torque than stock. I think I might have lost some torque at the 1,000-1,500 rpm mark though.

On a ZD30? Don't bother. One of them is to assist in engine shut down, the larger one from memory, the other is the swirl valve control. Both vacuum controlled, so if you want to play around with the swirl, just remove and plug the vac line that goes to it. From memory the swirl stay open fully when disconnected.

[10G]

I read the first 10 pages of this thread then ran out of time.

Is anyone here making blanking plates for the ZD30? I have 2013 GU 3L.

I think having to clear error codes generated by the EGR block will drive me crazy so I'm thinking.....

I know putting a hole in the blanking plate partially defeats the purpose, but let's say I block 50% of the gasses, that means it will take twice as long to get the same amount of EGR gassess into the intake as it would had I not partially blocked it. OR it will take 10 years to get as much EGR gassess into the intake at a 50% blocking rate instead of 5 years had I not done anything.

That sounds reasonably correct doesn't it?

[togenshi]

Did you reset your ECU? I let my car re-calibrate itself for 30mins and had no P401 issues for months. Took battery off for a day, P401 everywhere :S. This is cause the ECU is expecting x amount of EGR. If you re-calibrate it to expect y amount of EGR (read none), the ECU wouldn't think there is an issue.

To re-calibrate the ECU, take the battery off the night before. Switch on car and let it idle till the temp is half way on the gauge.

[mudski]

I read the first 10 pages of this thread then ran out of time.

Is anyone here making blanking plates for the ZD30? I have 2013 GU 3L.

I think having to clear error codes generated by the EGR block will drive me crazy so I'm thinking.....

I know putting a hole in the blanking plate partially defeats the purpose, but let's say I block 50% of the gasses, that means it will take twice as long to get the same amount of EGR gassess into the intake as it would had I not partially blocked it. OR it will take 10 years to get as much EGR gassess into the intake at a 50% blocking rate instead of 5 years had I not done anything.

That sounds reasonably correct doesn't it?

Pretty normal if your running a Scan Gauge or similar to see this error come up on your model. @Hodge had a CRD with the full block and while he did see the error code he just left it from memory. Use a full plate, if the error issue concerns you, drill an 8mm hole in the centre of it.
http://www.ebay.com.au/itm/EGR-Blank...item35d21ce63a