Turbo not kicking in

[DanMK7uk]

What does it rev to ?

Order a leak off kit and check them.

[Nick_B]

I can’t find what -100% means.

I drove it with forscan running and when I accelerated it goes straight to -100%
When idling it stays at 0%

[DanMK7uk]

Are you comparing the duty cycle and commanded ?

[Nick_B]

I’m not sure,

How do I compare them?

Sorry, I’m new to forscan

[DanMK7uk]

I can’t find what -100% means.

I drove it with forscan running and when I accelerated it goes straight to -100%
When idling it stays at 0%

Open

Commanded 0 means pcm wants closed
Command 1 - 100 means pcm wants open

Now then, duty cycle, 100 means closed
Duty cycle 0 means open

Iv already posted about -100 mate read back a few posts.


I had to work this out the other day as suspected my egr was playing up, it’s actually ok.


Go onto live data and put in the seach EGR it will give you options for commanded and the other which is duty cycle to monitor the valves behaviour.

[metalworker0]

well there is a lot of Confusion then when I cant rely on the net to give me an honest answer

AI says

EGR is 0% for fully closed up to 100% for fully open.

and lots of others

here 1/3 way down the page

https://carista.com/en/blog/what-is-an- ... fkvn5zjkj0

and many many more say ; EGR is 0% for fully closed up to 100% for fully open. except for a skoda site and a couple of others who say it the wrong way round.

all the best.mark

[DanMK7uk]

well there is a lot of Confusion then when I cant rely on the net to give me an honest answer

AI says

EGR is 0% for fully closed up to 100% for fully open.

and lots of others

here 1/3 way down the page

https://carista.com/en/blog/what-is-an- ... fkvn5zjkj0

and many many more say ; EGR is 0% for fully closed up to 100% for fully open. except for a skoda site and a couple of others who say it the wrong way round.

all the best.mark

Correct for commanded

The duty cycle is opposite from my own research and testing on forscan.

Cheers

[DanMK7uk]

I’m not sure,

How do I compare them?

Sorry, I’m new to forscan

Open

Commanded 0 means pcm wants closed
Command 1 - 100 means pcm wants open

Now then, duty cycle, 100 means closed
Duty cycle 0 means open

Iv already posted about -100 mate read back a few posts.


I had to work this out the other day as suspected my egr was playing up, it’s actually ok.


Go onto live data and put in the seach EGR it will give you options for commanded and the other which is duty cycle to monitor the valves behaviour.

[Nick_B]

These are the EGR readings I’m getting

I did a reset EGR values and left the engine running

https://youtube.com/shorts/9DmSc56Bt3E? ... -1A5uCj9kE

[vansit1]

what brand is it and maybe it has backwards wiring from the faulty factory when its -100?

[Nick_B]

The new EGR valve manufacturer is Cambiare

Is this brand a dodgy brand?

[Nick_B]

After installing a new EGR are there any other steps I need to take other than resetting the values?

After installation, I reset the EGR values on forscan then left the engine running for about 10 mins.

[tranmx2]

The position of the EGR valve is dependant on the power required from the engine.
Power from the engine requires clean air. Starting the engine requires clean air.
Generally the valve is open/opened when there is no or little movement of the accelerator pedal ( the pedal has slight movement to icrease rpm/power or closed). E.g. Travelling at 60 mph on a motorway (cruising).
The EGR can be closed at idle when power is required from the engine without moving the accelerator pedal. E.g. Very low mph with the engine at idle 840 rpm.
The EGR can be open at idle when no power is required from the engine.
Before the application of electronics to engines a mechanical governor was used this was connected to the fuel rack on diesels, as the rpm reduced the govenor caused more fuel to be injected into the combustion space so giving more power. A good example is the old single cylinder powered building site dumpers which could go up and down hills over rocks with a full load at idle - no need to touch the accelerator/throttle.

No duty cyle re' the EGR has been found - the nearest thing could be what is called cleaning the valve. The EGR is not cylclic.
Prior to stopping the engine the engine may have been idling for some time - the EGR could have been open - on stopping the engine the EGR returns to its closed position.

Usually 0% is closed and 100% is open.
The purpose of the EGR is to reduce Nox emissions. There is a variety of EGRs.
The EGR fitted to the Transit Euro 5 stage emissions are electronically controlled/monitored.

Using Forscan live data it is likely better to show the engine RPM, ECT, IAT, MAP with the EGR readings.
EGRPB1 might be a derived reading.

Basically for an engine to work it needs an unrestricted supply of air and fuel and an unrestricted outlet/exhaust.

[Nick_B]

After replacing the EGR valve the issue with the Turbo not kicking in around 2000 revs is still there.

Im going to take out the injectors again and see if there's any carbon build up. I also need to inspect the injector nozzles to see if there are any blockages.

I've seen a few videos on youtube where they've taken the tip of the injector off to clean it and test the spray pattern.

[knobby1]

Im going to take out the injectors again and see if there's any carbon build up. I also need to inspect the injector nozzles to see if there are any blockages.

I've seen a few videos on youtube where they've taken the tip of the injector off to clean it and test the spray pattern.

How are you going to test them..??

You need specialist equipment to do this....these nozzles are electronic and run at up to 1600bar or 26,200psi.

Lord Knobrot