Hi guys. I'm new to this forum but not new to TDI's or diesels. EGR is a nasty thing, which is why I'm strongly considering buying a CTD before Jan 1st. The combination of sooty egr smoke and oily ccv fumes are what cause the hard carbon buildup in TDI engines. To minimize this you can dial down the EGR duty cycle with the vag-com diagnostic software, and modify the ccv.
A typical ccv mod is the 'elephant hose' mod, which simply re-routes the ccv oil mist flow with a heater hose all the way down to the bottom of the car, so that the mist just escapes or drips onto the road. The hole on the intake where the CCV was previously connected to is plugged. This isn't the most environmentally friendly way to do it, but with as little blowby as tdi's have, the drips aren't really a problem for garage floors, etc. Other folks hook up various filtration to their ccv system, which get more complicated.
Many tdi'ers have eliminated their egr completely with various aftermarket or home made straight pipes, and blocked off the flow from the egr cooler. Some have simply disconnected the vacuum line to the EGR. Either of these methods will keep the intake clean with no EGR operation, however you will have a check engine light. I anticipate defeating this very check engine light will be an issue for future cummins with egr owners who try to disconnect their egr's. A diode device with vacuum switch has been developed to fool the ECU into thinking the EGR is working on TDI's, however, who knows with the Cummins...
I must say any modification of the emissions systems on your vehicle that results in increased emissions is a violation of federal law, and should be done for off-road use only!
How's this for 40k miles with no mods? Don't ya want to scrape some of that out and spread it on some hot toast?!
P. S. this is NOT my intake!
A typical ccv mod is the 'elephant hose' mod, which simply re-routes the ccv oil mist flow with a heater hose all the way down to the bottom of the car, so that the mist just escapes or drips onto the road. The hole on the intake where the CCV was previously connected to is plugged. This isn't the most environmentally friendly way to do it, but with as little blowby as tdi's have, the drips aren't really a problem for garage floors, etc. Other folks hook up various filtration to their ccv system, which get more complicated.
Many tdi'ers have eliminated their egr completely with various aftermarket or home made straight pipes, and blocked off the flow from the egr cooler. Some have simply disconnected the vacuum line to the EGR. Either of these methods will keep the intake clean with no EGR operation, however you will have a check engine light. I anticipate defeating this very check engine light will be an issue for future cummins with egr owners who try to disconnect their egr's. A diode device with vacuum switch has been developed to fool the ECU into thinking the EGR is working on TDI's, however, who knows with the Cummins...
I must say any modification of the emissions systems on your vehicle that results in increased emissions is a violation of federal law, and should be done for off-road use only!


How's this for 40k miles with no mods? Don't ya want to scrape some of that out and spread it on some hot toast?!
