2010 Vauxhall Insignia knocking noise

Car: Vauxhall Insignia
Year: 2010
Variant: 20 ctdi sri
Categories: Running Rough, Starting & Power Loss
When i am crawling along in traffic in 1st or 2nd gear every time i accelerate and then release the accelerater pedal i hear a single knock sound which seems to be coming from underneath the car somewhere? Any ideas anyone.
Posted: Feb 12, 2015 (9 years ago)
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