AvantSE Posted February 24, 2008 Report Share Posted February 24, 2008 Spend a few hours last night and this morning removing, cleaning and reinstalling the EGR valve and inlet manifold on my A4 TDI, having seen some of the pictures of soot build-up on the web. After 150,000 miles there was a fail amount of crap built up in the EGR though not as bad as some I have seen. Now this is clean and shiny. What is alarming though is the amount of carbon and black oily sludge that was stuck inside the inlet manifold (and no doubt the inlet ports on the head, which I left well alone for fear of getting clumps of carbon into the cylinders). All this because it recirculates some exhaust gas back through the engine. The inlet would be pretty much spotless otherwise. Still, it's done now and very unlikely it will need doing again unless I keep the car to 300K ! Link to comment Share on other sites More sharing options...
cruiser647 Posted February 24, 2008 Report Share Posted February 24, 2008 Any performance difference? Link to comment Share on other sites More sharing options...
AvantSE Posted February 24, 2008 Author Report Share Posted February 24, 2008 Not had chance to try it yet, but I did it to minimise smoking and as it was probably bunged up a bit after all those miles. Will let you know tomorrow when I've driven it. I made the VAGCOM mod to reduce EGR activity some time ago. Link to comment Share on other sites More sharing options...
AvantSE Posted February 25, 2008 Author Report Share Posted February 25, 2008 Well, I can confirm that it seems to have made bugger all difference to performance, which is to be expected as it wasn't as bunged up as some pics you see. Link to comment Share on other sites More sharing options...
cruiser647 Posted February 26, 2008 Report Share Posted February 26, 2008 Oh well. Good practice though. Link to comment Share on other sites More sharing options...
James A4 2.5TDI Quattro Posted June 4, 2008 Report Share Posted June 4, 2008 A few months ago i have my A4 2.5 TDI chipped from 180bhp to 215bhp, on a long motorway drive the emmisions light was on for about 10 mins. from diagnostic i found there was a problem with the Egr valve possibily soot build up! Also i have noticed it has been smoking more from the exhaust when pulling away from traffic lights could this have been caused from having it chipped? Any suggestions? Link to comment Share on other sites More sharing options...
kite Posted June 4, 2008 Report Share Posted June 4, 2008 Mine has been mapped for nearly a year without any problems. Link to comment Share on other sites More sharing options...
Recommended Posts
Please sign in to comment
You will be able to leave a comment after signing in
Sign In Now