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| backfiring carb https://www.ausmini.com/forums/viewtopic.php?f=2&t=46760 |
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| Author: | carter [ Sat Oct 18, 2008 12:04 pm ] |
| Post subject: | backfiring carb |
g'day all what would cause my mini when you start it up to put your foot down and it back fires out the carb?and when you put it in gear and drive it kind of surges power no power power no power? could this be because of carb getting too much fuel? |
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| Author: | 9YaTaH [ Sat Oct 18, 2008 12:17 pm ] |
| Post subject: | Re: backfiring carb |
carter wrote: g'day all what would cause my mini when you start it up to put your foot down and it back fires out the carb?and when you put it in gear and drive it kind of surges power no power power no power? could this be because of carb getting too much fuel?
Timing is out 
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| Author: | carter [ Sat Oct 18, 2008 3:57 pm ] |
| Post subject: | |
just been timed.....new plugs and points as well..... |
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| Author: | superSeven [ Sat Oct 18, 2008 4:14 pm ] |
| Post subject: | |
could it be running too lean? you get backfire through the carb when the fuel mix is too lean, and backfire through the exhaust when too rich, i know this is true as my old weber used to backfire through the carb on cold mornings when the air was denser, and caught fire to my air filter element once! |
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| Author: | TheMiniMan [ Sat Oct 18, 2008 4:53 pm ] |
| Post subject: | |
is there any oil in the Dash-Pot of the carby??? |
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| Author: | 9YaTaH [ Sat Oct 18, 2008 4:58 pm ] |
| Post subject: | Timing? |
carter wrote: just been timed.....new plugs and points as well.....
Distributor 180 degrees out
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| Author: | carter [ Sat Oct 18, 2008 5:13 pm ] |
| Post subject: | |
there is oil in the dashpot but may need topping up as when it backfires through the carb it shoots oil aout as well. dizzy is good.too lean u mea not getting enough fuel?.....thats what i was wondering....is it you wind it up you leesen petrol or wind it downyou lessen petrol? |
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| Author: | Tspeed Jem [ Sat Oct 18, 2008 6:02 pm ] |
| Post subject: | |
Could be an air leak in the intake manfold somewere (usually gasket on the head). |
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| Author: | Mick [ Sat Oct 18, 2008 6:17 pm ] |
| Post subject: | |
carter wrote: dizzy is good.too lean u mea not getting enough fuel?.....thats what i was wondering....is it you wind it up you leesen petrol or wind it downyou lessen petrol?
You don't just haphazardly screw the mixture knob in an out or you will cause all kinds of problems, you need to get the manual and follow it step by step to give it a tune. |
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| Author: | TUCK3r [ Sat Oct 18, 2008 6:52 pm ] |
| Post subject: | |
 um when i did my points condensor and leads i mixed up numbr 2 and 3 lead and that causes the sympton described by you. probaly not whats the cause but maybe just check it.
cheers TUCK3R |
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| Author: | carter [ Sat Oct 18, 2008 7:56 pm ] |
| Post subject: | |
gaskeyt on the head you mean manifold gasket???.....would this cause it to backfire out the carb or exaust? |
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| Author: | superSeven [ Sat Oct 18, 2008 8:46 pm ] |
| Post subject: | |
carter wrote: gaskeyt on the head you mean manifold gasket???.....would this cause it to backfire out the carb or exaust?
leak on the manifold gasket on the inlet ports would cause backfiring through the carb as it's diluting/leaning out the fuel mixture. |
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| Author: | ronhic [ Sat Oct 18, 2008 8:49 pm ] |
| Post subject: | |
Is your advance working in the distributor and is your PCV in good order (I assume you have PCV?) Ollli suffered what you are describing and this is one more easy thing to check.....especially since your distributor has been looked at recently. |
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| Author: | carter [ Tue Oct 21, 2008 5:33 pm ] |
| Post subject: | |
i only have single carb....and advance not conected up...... |
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