Jump to content


Photo
- - - - -

Engine Fires On Starter, But Dies Immediately On Key Release

engine electrical

  • Please log in to reply
9 replies to this topic

#1 Mini_Kit

Mini_Kit

    Starting My Mini Up

  • Noobies
  • Pip
  • 2 posts
  • Location: Bedford

Posted 28 June 2020 - 02:01 PM

Hi,

 

Engine is a 998cc from an E plate Classic Mini. Only 30k miles under belt.

 

Just replaced:

- Full service (plugs, filters, etc)

- Dizzy + cap

- HT leads

- Alternator

- Starter motor

- Radiator + hoses

- Resistive wire with in line resistor

- SU carb cleaned and is operating fine

 

She has been mothballed for a while prior and we had the engine turning over and firing last summer before the above work was done.

 

Now when we try to restart her, the engine catches and revs while on the starter motor, however, once the key is release back to position 2, the engine dies. No follow on or attempt to idle.

 

We figured it might be the ignition switch, so replaced that, but with the same result.

 

Kind of think it's an electrical problem, but not sure what to check.

 

Any thoughts out there?

 

 



#2 cal844

cal844

    Crazy About Mini's

  • Members
  • PipPipPipPipPipPipPipPipPipPip
  • 7,982 posts
  • Location: Ballingry, Fife
  • Local Club: TFMOC

Posted 28 June 2020 - 08:35 PM

Sounds like the plug leads arent on right, double check the firing order

#3 MiniMadRacer

MiniMadRacer

    Mini Mad

  • Members
  • PipPipPipPip
  • 285 posts
  • Location: Essex

Posted 28 June 2020 - 09:02 PM

Check you have power to the coil when the key is in Position II with the panel lights on the dashboard illuminated.



#4 GraemeC

GraemeC

    Crazy About Mini's

  • TMF+ Member
  • PipPipPipPipPipPipPipPipPipPip
  • 6,169 posts
  • Location: Carnforth

Posted 28 June 2020 - 09:25 PM

As above - sounds like your missing the main ignition feed to the coil and it’s running on the cranking bypass.

Post some picture of your coil connections.


Edited by GraemeC, 28 June 2020 - 10:18 PM.


#5 dotmatrix

dotmatrix

    Speeding Along Now

  • Members
  • PipPipPipPipPip
  • 341 posts
  • Location: Vejle

Posted 28 June 2020 - 09:46 PM

pre-engaged starter?



#6 Mini_Kit

Mini_Kit

    Starting My Mini Up

  • Noobies
  • Pip
  • 2 posts
  • Location: Bedford

Posted 04 July 2020 - 12:59 PM

Lots of head scratching and YouTube videos later, I gave in and got an expert in. (Thxs Bedford Tich!)

 

After a few umm, ahhs and probing with the magic lamp turns out that nothing was going through the recently fitted ballast. By passed the ballast and she fired up ran fine.

 

Still unsure what was broken and how it was fixed, but now tuned and runs much better. Will need to revisit the mixture at a later date as running a little rich, but cross that bridge later.

 

Thxs all for the input.



#7 pete l

pete l

    One Carb Or Two?

  • Members
  • PipPipPipPipPipPipPip
  • 1,150 posts
  • Location: East of France

Posted 06 July 2020 - 07:00 AM

If you bypass the ballast, surely you will burn out the coil.



#8 cal844

cal844

    Crazy About Mini's

  • Members
  • PipPipPipPipPipPipPipPipPipPip
  • 7,982 posts
  • Location: Ballingry, Fife
  • Local Club: TFMOC

Posted 06 July 2020 - 02:00 PM

If the resistor wire is bypassed you'll need to fit a 12v coil.

#9 Ethel

Ethel

    ..is NOT a girl!

  • TMF Team
  • PipPipPipPipPipPipPipPipPipPipPip
  • 23,713 posts
  • Local Club: none

Posted 06 July 2020 - 05:41 PM

...unless the OP already has a 12v coil, which'd explain why it wouldn't run with a ballasted supply.



#10 cal844

cal844

    Crazy About Mini's

  • Members
  • PipPipPipPipPipPipPipPipPipPip
  • 7,982 posts
  • Location: Ballingry, Fife
  • Local Club: TFMOC

Posted 06 July 2020 - 08:24 PM

...unless the OP already has a 12v coil, which'd explain why it wouldn't run with a ballasted supply.


Yes, that's quite possible too I suppose





Also tagged with one or more of these keywords: engine, electrical

1 user(s) are reading this topic

0 members, 1 guests, 0 anonymous users

Mini Spares