Its Possessed!

[Guest Tim Norman]

Got the Kitten running today and ticking over nicely albeit at 2k rpm but then it is a bit of a race engine. Well after 5 min when engine was up to temp I;

1. Turned it off with the key...engine kept going
   
2. Flicked the kill switch off... engine kept running
   
3. Disconnected the earth from the battery...engine kept running
   
4. Disconnected the live...engine kept running!
   

So no power going to the engine yet it still ran. I had to suffocate it to stop it.

 

Not a fookin' clue whats occurring! anybody got any ideas?

[Bob Tucker]

Similar thing has happened to me in the past with an electric fan.

With everything switched off, especially when it was ticking over fast,

the fan becomes a generator & supplies sparks to the rest of the engine.

 

But when it comes to lecktrickery I'm a complete numpty.

My brother sorted it for me, but cant remember how.

 

Try disconnecting the fan while the engine is running then switch off the engine.

Edited November 30, 2014 by Bob Tucker

[agent_zed]

dieseling? Sure i read something along the lines that oil from the sump can on a worn engine go into the combustion chamber and be burnt and keep the engine going, until the sump oil runs out.

[Snapperpaul]

Carbon build up, hot spot igniting the mixture

[speedtripledan]

my westy v8 used to stay running until the fan stopped, i also had a mk 1 civic s that got so hot when the head gasket blew that it kept running until i stalled it i did drive it for some distance with the temp redlined, it never ran again !

[Guest chris brown]

Alternator still supplying switched 12v side of ignition switch. (Just a thought)

[Guest Tim Norman]

Alternator is looking favourite at the minute. Going to have a look again tomorrow to see how I wired it all up. Cheers for the pointers so far.

[sj-bradley]

Call it "Christine" and be very nice to it ...

 

 

Simon.

[Guest peter2b2002]

dieseling? Sure i read something along the lines that oil from the sump can on a worn engine go into the combustion chamber and be burnt and keep the engine going, until the sump oil runs out.

i agree dieseling ,i saw a petrol engine blow its self up nearly 40 years ago when i was in the last year of my apprentiship i think it was in a ford cortina one of my mates had

peter2b

[Guest chris brown]

 

i agree dieseling ,i saw a petrol engine blow its self up nearly 40 years ago when i was in the last year of my apprentiship i think it was in a ford cortina one of my mates had

peter2b

common enough on a diesel to run on its own oil but a petrol engine would have to be absolutely shot to run on these days with cleaner petrol and oil we don't get build up of carbon like we used to do when bits of carbon used to glow red hot and cause run on

[Guest Ian & Carole]

Sounds to me like it has found a feed from somewhere and is self feeding the ignition. Defo alternator.

[Longboarder]

If it has a coil get it running and then pull the 12v LT coil feed wire off its post. If that kills it then you are getting 12v feedback from alternator. If it continues to run then it must be dieseling.

 

Nigel

[Guest Tim Norman]

Can't imaging it dieseling as the oil is nice and clean and no smoke from the exhaust.

I'll try that tomorrow cheers

Edited November 30, 2014 by Tim Norman

[fry61]

Stop complaining Tim, you've built an engine that runs on fresh air.

[Guest Tim Norman]

Maybe but make it a little unsafe if I can't turn it off!