have been playing with the twin carb tuning, so is that the likely cause
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| what does it mean when? https://www.ausmini.com/forums/viewtopic.php?f=2&t=36684 |
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| Author: | mooman10_0 [ Sat Oct 13, 2007 3:43 pm ] |
| Post subject: | what does it mean when? |
You turn off your car but it turns over once more after the key has been turned off? What do I need to adjust? |
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| Author: | boho [ Sat Oct 13, 2007 3:46 pm ] |
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It's called run on. Has something to do with the carby being too lean or rich, i believe. |
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| Author: | Blokeinamoke [ Sat Oct 13, 2007 3:56 pm ] |
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or your engine being coked up |
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| Author: | sports850 [ Sat Oct 13, 2007 3:56 pm ] |
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Run-on , pre-ignition several other names , basically it means for some reason the fuel/air mix is igniting under pressure in the engine even without the plug sparking . Has it always done it or only just started lately ? |
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| Author: | mooman10_0 [ Sat Oct 13, 2007 4:00 pm ] |
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have been playing with the twin carb tuning, so is that the likely cause
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| Author: | boho [ Sat Oct 13, 2007 4:01 pm ] |
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If mooman doesn't mind me jumping in, the BOC's always done this on and off (i posted about it just after i joined) and it hasn't chanhged. It's usually a sign that my oil's a little low. |
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| Author: | sgc [ Sat Oct 13, 2007 4:26 pm ] |
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My car used to run on all the time until it was properly tuned. It's often a combination of things: * Too rich mixture * .. left for too long, causing excessive carbon buildup in the combustion chambers. This glows and stays hot and ignites the air/fuel mixture after the ignition is switched off. * Timing too far advanced, causing higher than normal engine temperatures. * Compression ratio too high for the octane fuel you're using, allowing the fuel to detonate under compression (like a diesel). Run-on is a sign of bad things going on in your engine and you need to do something about that. In the interim, I always used to control the run-on using the clutch in gear -- not good, but better than letting the engine fire uncontrollably and potentially blowing a hole in a piston/valve. |
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