![]() A smoke emissions test will still however be carried out. ![]() Until recently, it was normal practice for common rail diesel fuel injection specialists like CRD Performance and even some general repair garages to completely remove these troublesome filters. In extreme cases, an engine may initially start but then stall, or even not start at all this could be due to a severely blocked DPF. The engine water temperature gauge reads higher than normal, this could be because the DPF is partially blocked and is restricting the hot exhaust gases from escaping. During regeneration, some of the diesel injected through the engine on the exhaust stroke, by-passes the piston rings and ends up in the sump this is why it is recommend the oil should be flushed and changed frequently and following repairs. There is an excessive amount of smoke coming from the exhaust when the vehicle is driven hard or when you re-start the engine after switching it off when hot, but re-starting it soon after. This may also be accompanied by a change in engine note and excess smoking from the exhaust tailpipe this may be because an active DPF regeneration is taking place. ![]() The engine may seem down on power and have a different sound or a change in its exhaust note it may also seem less responsive than normal when revved hard and the vehicle stationary. If the vehicle is an auto, the gearbox may sometimes seem to stick in a high gear when setting off and then not change through the gears as normal once again, re-starting the engine may clear the EML and temporarily re-set the gearbox fault. Most owners of late model onwards, some even older turbocharged diesel vehicles, that are installed with a manufacturers DPF will sooner or later encounter one or more of the following concerns. From just an initial fault code read through the vehicles On Board Diagnostic OBD socket using a Scan Tool, to using other specialist test equipment i. Whatever the fault or cause of your Diesel Particulate Filter DPF related problems, CRD Performance offer a comprehensive diagnostic check and repair solution for most cars and light vans.
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