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Car Forum / MINI / September 2005OVER RUNNING
Hi, Anyone got any advice as to how to cure the problem of the engine over running when you turn off the ignition and remove the key? Standard 998 1986 Mayfair. Cheers Martin > Hi, Anyone got any advice as to how to cure the problem of the engine over > running when you turn off the ignition and remove the key? Standard 998 > 1986 Mayfair. > > Cheers > Martin Running on - usually hot spots in the head, mixture combination. Ok thanks, Too weak or too rich? >> Hi, Anyone got any advice as to how to cure the problem of the engine >> over running when you turn off the ignition and remove the key? Standard [quoted text clipped - 4 lines] > > Running on - usually hot spots in the head, mixture combination. too far advanced dizzy? - standard is around 10-12 >> Hi, Anyone got any advice as to how to cure the problem of the engine >> over running when you turn off the ignition and remove the key? Standard [quoted text clipped - 4 lines] > > Running on - usually hot spots in the head, mixture combination. You're right, Rob. Lean mixture can cause running-on due to hot spots. It's also possible for hot spots to develop due to over-advancing or over-retarding the ignition. Very rarely it can happen due to a cracked exhaust valve. Cheers, Kelley >> Hi, Anyone got any advice as to how to cure the problem of the engine over >> running when you turn off the ignition and remove the key? Standard 998 [quoted text clipped - 4 lines] > >Running on - usually hot spots in the head, mixture combination. > Hi, Anyone got any advice as to how to cure the problem of the engine over > running when you turn off the ignition and remove the key? Standard 998 > 1986 Mayfair. > > Cheers > Martin Check your ignition timing, static and dynamic. Remember to disconnect vacuum hose when setting timing. Chris The reason I ask is I can't get the idle speed below 1200 rpm, unless I run as lean as a very lean thing. What else could be causing it to idle at about 1400rPM >> Hi, Anyone got any advice as to how to cure the problem of the engine >> over running when you turn off the ignition and remove the key? Standard [quoted text clipped - 7 lines] > > Chris > The reason I ask is I can't get the idle speed below 1200 rpm, unless I > run as lean as a very lean thing. What else could be causing it to idle [quoted text clipped - 11 lines] >> >> Chris A vacuum leak? The throttle valve not closing properly? The breather pipes might be split, or there might be an air leak in the crankcase or your oil filler cap is letting by too much air(sounds a bit silly but the engine sucks air through this point for breathers!) miniman >> The reason I ask is I can't get the idle speed below 1200 rpm, unless >> I run as lean as a very lean thing. What else could be causing it to [quoted text clipped - 19 lines] > > miniman And even down to worn throttle body shaft. Its leaned off because the air/vacuum is sucking the piston and needle up too far at idle!. Yep its an air leak somewhere. even check the inlet manifold tightness, squirt some oil over the flange and see if that slows it down or oil/smoke comes out the exhaust.
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