Hey guys

 

Any idea how to cure this code below 👇 car drives perfect, but when I try to over take on the motorway the car dies, I need to power off ignition and back on and boost comes back to overtake.

 

Done a scan on vcds as attached, what I've tried is 

 

1,Changed EGR valve, 

2,EGR cooler delete (cooler still there just blocked the exhaust pipe with a blanket)

3,Mr muscle on turbo and freed up the actuator.

4, changed vacuum block

5, checked all vac hoses and blew them out with compressor.

 

I'm fresh out of ideas, code keeps coming back, and after 1 or 2 days the MIL comes back on .

 

I know of the other posts of the same code but can't seem to see anything to fix it. 

 

 

Edited 6 January, 20251 yr by DonkeyDick1992

1 hour ago, DonkeyDick1992 said:

I'm fresh out of ideas, code keeps coming back,

 

1 hour ago, DonkeyDick1992 said:

2,EGR cooler delete (cooler still there just blocked the exhaust pipe with a blanket)

 

There is your problem!

 

When EGR is commanded the ECU expects to see a corresponding decrease in the filtered air passing through the MAF sensor, your EGR is not passing any gases and the MAF is passing the same volume of air because you have blocked the cooler , a sensible thing to do AFAIK but you need to take measures to prevent the ECU doing what it is supposed to when EGR flow is impeded.

 

The solution is an EGR emulator/simulator available on ebay for £99 or maybe more now from an Eastern European seller, I have been running one for 4 years and 60K miles without any problems.

 

 

Edited 6 January, 20251 yr by J.R.

2 hours ago, DonkeyDick1992 said:

2,EGR cooler delete (cooler still there just blocked the exhaust pipe with a blanket)

 

Its possible I misunderstood this, can you explain it in better detail?

Cheers mate appreciate your help, so the lower EGR cooler pipe ( U shape) kept breaking, so I just blanked it using an egr blanking plate and gaskets, 

 

Ok will need to look at that, I thought I may be able to change the measurements for the EGR on the vcds but I'm using the 24.7.1v so that option is no longer possible 

I chose not to fit the blanking plates so that I could easily revert to standard operation (swapping 2 connectors) if ever I had a problem so as to rule out the fiddling of the ECU data by the emulator simulator or if it became a problem for the CT test. My EGR had not failed at that time, it was a pre-emptive measure, I don't expect the EGR to fail now that it is not functioning, they were only designed to work during the MOT tests with the cheat software 🤣

 

Its invisible if some thought is given to placement, running of cables etc so there have been no problems with the CT and there have been no electronic problems so it does what it says on the tin!

 

How it works is to take the command signal to the EGR cooler valve and give a corresponding EGR valve position sensor reading to the ECU so it thinks the thing is working and has been actioned, it also intercepts the MAF sensor output to the ECU and tweaks it according to the commanded EGR reducing the flow figure accordingly, en bref it fools the ECU that the EGR is operational and doing what it should be doing.

 

Edited, it also does the same disabling and fiddling with the output reading of the throttle valve (which pulls through the EGR gases) although it does not stop it functioning as an anti-shudder device on engine shutdown.

Edited 6 January, 20251 yr by J.R.