popping noise

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Betty boop 1
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popping noise

Post by Betty boop 1 »

good afternoon all betty our 1.9dg wbx has started with a small "popping" noise when on tick over, in order to try and fix this i have started with the obvious and have changed her plugs, dizzy cap, roto arm, coil and leads, to no avail, when she is ticking over there is a small amount of white smoke (this clears after a few minutes) but when she pops its almost like a tiny back fire, when this happens it can be seen in the smoke akin to a puff "if that makes sense" anyone have any ideas
many thanks
ewan

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bigbadbob76
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Location: Isle of Skye

Re: popping noise

Post by bigbadbob76 »

If you have a timing light, or can beg/borrow/steal one, I'd check the timing.
Also check your vacuum advance is working.
Popping suggests either timing or an air leak in or around the carb.
Hope that helps.
'86 1.9 DG, 4 spd, tintop, camper conversion.
Split case club member.

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