Been having lots of problems with cold starting, lumpy idle, then a P0401 code - exhaust recirculation low flow. It's a 2006 BRD engine.
Read a few posts which pointed me in the direction of the EGR valve. I removed this yesterday, and sure enough it was caked up with carbon deposits. I started cleaning it, and while waiting for the ball and chain to fetch the carb' cleaner, checked the EGR valve actuator drive gears for wear as had been mentioned several times, and found the teeth on two of the gears completely worn out.
Checked, and these wouldn't mesh to open the valve, so wouldn't, I presume allow the exhaust gases to be mixed into the fuel / air mix to dilute the combustion mix to reduce NOx production.
Saved me a job of cleaning the EGR, and I've ordered a new one from GSF, however, there's LOADS of carbon build up in the stainless steel exhast gas inlet pipe. I'd like to remove and clean this pipe, but can't see where it goes, and how to remove it?
Anyone have any ideas please?
Thanks very much in advance