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Misfire creates loud knocking in brake servo vacumm pipe

Posted: 01 Sep 2017, 17:43
by Lcfc78
Hi

After some help I have an issue with my 1.9 dg t25 occasionally when Luke warm it gets a misfire that creates a loud knocking noise in the brake servo vacumm pipe and the misfire get worse until un driveable then give it 5 mins start it and it runs fine for a week. This mainly happens when it is stood for a few days and is driving me mad, does anyone have any suggestions?

Thanks

Lee