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Registered
Join Date: Jul 2001
Posts: 1
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Backfire
When I start my 1966 912, I get a huge backfire that sounds like a stick of dynamite. Seems to happen when the car is cold and air temperature is cool. I have rebuilt my Solexes and have MDS ignition. I also changed the exhaust manifold gasket thinking it might allow air in to ignite unburned fuel. Nothing has worked. Anyone have a suggestion?
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07-06-2001, 11:58 AM
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Registered
Join Date: Nov 2000
Location: Redding,CA USA
Posts: 286
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The backfire may be caused by one of the following: Lean mixture.
Leaky or sticking intake valve or a weak or broken intake valve spring. Bad distributor cap. Intermittent short circuit in primary or a short circuit in the coil or in secondary wire from coil to distributor. (Any of these will cause a loud muffler explosion.) Hope this is of some help to you. Good luck, Duke-69/912. |
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07-06-2001, 07:00 PM
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Registered
Join Date: Jan 2001
Location: KS
Posts: 708
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I had the same problem when I temporarily had a electric fuel pump with too much fuel pressure.
------------------ Joshua Harrison 1968 912 Coupe www.geocities.com/jkh912 |
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07-06-2001, 07:08 PM
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