I have this in with blocked DPF far beyond regen now, due to glow plug fault present for last year or two, which has prevented regeneration process. My insitu cleaner cancelled his appointment with me today, all DPF flange bolts rotten and customer pleading poverty so insitu cleaning was best option as this is only the start of her problems. In order also to expedite her in being the end of mine I decided to remove temp sensor spray DPF cleaner, replace sensor then run up to full temp and spray TFR through inlet system which then steams out though DPF at high revs. This seemed to be quite successful in a pretty short space of time. Exhaust back pressure was 30mb at idle rising to nearly 500mb at full blast after cleaning I brought it down to 3mb at idle and never got it over 50mb at any high revs or speed. In disbelief at how quickly I resolved this I continued with cleaning only to discover pressure started to rise again and this 3FFO air flow fault code occurred it deletes but re occurs every time engine is run. I am wondering if I have upset swirl flaps causing more muck to loosen and partially block DPF or CAT. I just have a gut feeling it’s not going to be MAF sensor but whatever it is she won’t want to spend, the trouble when you do work for near nothing you find more work you know you’ll be fixing for even less that. I will drive it home and sleep on it hopefully not both at the same time! ![sweating]( "sweating")
