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Matt
Matt, Mechanical Engineer
Category: Jaguar
Satisfied Customers: 21628
Experience:  BEng hons Mech engineering, in auto industry 22 years
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Can you tell me why I'm getting thick black smoke out of the

Resolved Question:

Can you tell me why I'm getting thick black smoke out of the exhaust and why is the glow plug light flashing
Submitted: 1 year ago.
Category: Jaguar
Expert:  Matt replied 1 year ago.
Hello I'd first check all the high pressure hoses post turbo/s for any split hoses or cracked metal pipes, also check the ends of the intercooler as its not unheard of to pop the end caps off under high boost.as you have a flashing glow plug light then it would also pay dividends to have a scan tool plugged in to read off the fault code a burst or loose pipe will result in over fuelling and black smoke as you describe If this Ok then it could be a major engine sensor such as the airflow meter or cam position sensor has failed so that the ECU is now overfuelling or injecting at the wrong point and resulting in poor combustion.The quickest route to repair is to have the car plugged into a diagnostic machine which will read off the fault code stored in the ECU and indicate which sensor has failed or whether the fault is more serious. Another possibility is that the fuel filter is blocked so resulting in low fuel pressure and again poor combustion - replace the filter in any case as diesels are very sensitive to this also check how much oil is going through the breather by popping off the intake hose in front of the turbo and checking for oil deposits. Diesels will run off engine oil so this could also be making it rich If its been overfilled with oil it will also produce surging as the oil finds its way back into the engine
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