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Backfiring

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vwbugsrule Slammed & Awesome Dubber

84 posts · joined Feb 2011 ·

#870162
Hey guys i started up my engine and it is backfiring, what causes
Backfiring and How do I solve it? It's a 40hp 1200.
Cheers

vwbugsrule Slammed & Awesome Dubber

84 posts · joined Feb 2011 ·

#870180
nah i have not tried that. Where should i set the timing for my 40hp (big dizzy) ?

vvwbeetle Officially Full-On Dubber

234 posts · joined Apr 2011 ·

#870194
Also check your exhaust for a leak

turboty Officially Full-On Dubber

208 posts · joined Jul 2012 ·

#944789
vvwbeetle wrote:Also check your exhaust for a leak
yep.... i just busted my exhaust and is now sounding like a wrx... but back fires massively on the down gear!!! sounds good and is fun to drive but prob not good for her...
just because its a kit car... doesnt mean its not a vw!

68AutoBug Beetle Restorer - Experience over 138\% - YIKES --

11,654 posts · joined Aug 2002 ·

#944795
vwbugsrule wrote:Hey guys i started up my engine and it is backfiring, what causes
Backfiring and How do I solve it? It's a 40hp 1200.
Cheers
not timed correctly... [distributor]
or a leak in the exhaust [very common]

VWs do not like any little air leaks in the exhaust or inlet..
one small hole somewhere will do it...

You can use Silastic brand silicone on all the exhaust gaskets
to make sure of no leaks... it handles the heat with no problems.

LEE
- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---

bajachris88 The international telephone dialing code for Antarctica is 6

6,661 posts · joined Apr 2005 ·

#944810
if backfiring on deceleration, can also be the result of running lean. You can hear it even on modern cars with uprated exhaust, that 'gurgle' and popping out the exhaust.

check points gap too when doing dissy timing, as the points wear, the gap only marginally changes which will put your timing out substantially. Do points first, then timing, otherwise you'll have to redo your timing, after doing points.
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