I have the power loss problem for sometime now. Recently while travelling from Bangalore to Mysore suddenly my mjd lost all power, pickup speed became like a loaded truck and I struggled to climb speed breaker also !! Luckily I was just 4km away from URS cars and I directly visited the Fiat SC. Waited for my turn and when the SA took the vehicle for a test drive everything seemed fine, rather it started behaving better than before. Puzzled I though may be it is due to some contamination in the diesel which went away, also the SA told me he suspects something to do with fuel supply, air intake or EGR. I left and later on my way back the problem came back but not to that extent. I cleaned the EGR, Intake Manifold at KHT Bangalore and also used Abro Injector cleaner for few 100 kms. KHT people told there is no problem shown in scanning and everything working just fine. But the problem remains. I observed some knocking sound at high rpm too, also the engine is going out of breath soon. The pickup is less and vibration is more. I am planning to get my car checked at some outside workshop now. I doubt the fuel supply pump/rail related issue. Could anyone suggest whether a bad fuel filter will cause these kind of issue ? Is it advisable to clean the entire fuel supply system including the fuel tank ? Anyone did it or suggest it ?