I was in my local the other night when in conversation with some locals when we realised we were all Skoda/VW owners with the 1.6tdi motor in their cars, and yes the subject of EGR, DPF, turbo vanes, injectors, archoil etc came up !

 

Everyone had one issue or another; mine is turbo whistle and frequent limp mode caused by overboost, others had shocking fuel economy (30-35mpg was mentioned), blocked DPF, EGR etc etc. 

 

What shocked me, and the reason for this post ... one lad reckons he takes off the EGR pipe which leads from the head to the 'throttle valve' assembly a few times a year and sprays EGR/carb cleaner into the outlet in the head towards the EGR valve using a long flexible pipe (ie against the usual flow of gases), he reckons the spray gets into the EGR, assists with breaking down deposits and helps to keep it working ok.

 

His VW Caddy 1.6tdi seems to go, stop and function as it should.

 

But? ... Surely not??

Tricky to know whether it would be doing any good, or harm, or nothing.

Is it just another example of coincidence being mistaken for cause and effect?

It would certainly find its way down by gravity to where it might have an affect.

 

My solution is an EGR emulator/simulator.