Forum:
i have had a popping noise on decelerating ever since buying the vehicle, in attempt to cure it i have fitted brandnew complete distributor, complete exhaust and manifold gasket, also the combined heat sheild and gasket that goes between the two manifolds.
There are no induction leaks,the webber carb has manual choke, so could not be cause.
It has been suggested to me that it could be the wormgear drive on the distributor.Does anyone know about this 
In every other way the engine is good, uses little oil & has 200psi on all 4 cyls.I would love to fix this rather than change engines.I am skilled volkswagon mechanic so dont mind getting stuck in to an engine. Any help would be great.
duke.
Cracked exhaust
Cracked exhaust manifold.
Timing, dizzy gear maybe, more likely bob weights throwing timing out.
Cam belt if fitted to these out a tooth or mistimed.
Tappets or valve issues, incorrectly adjusted or hydraulic lifters U/S.
If the carb is an aftermarket item it may need is chokes changing for the correct items, its possibly overfuelling in decalleration. Common problem with aftermarket carbs.
Alternatively turn the radio up.
Check the dynamic timing of the engine with marks and a timing light, this will give any advance or retard while running.
F80 fourtrak
firstly great hear of to another F80 . I take it, it's a 2.0 petrol .
I also have a F80 2.0 petrol Soft top i have also had a few pop's out the back
mine is just a bit of un-burn fuel in the exhaust. Sometime after really long trips when green laneing
sounds to me like some sort of miss fire . are you shore your weber is not over fueling your engine check your plugs.
Also i have a question for you how many miles to the gallon do you get from your fourtrak . mine is NOT good
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