Results 1 to 8 of 8

Thread: no spark

Forum to discuss Austin Healey Sports Cars

  1. #1
    Freshman Member eyera3's Avatar
    Join Date
    Jul 2011
    Location
    Portland
    Posts
    5
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    no spark

    hello all,
    I last drove my 1960 3000 MKI two weeks ago, I had to turn the car around so I pulled out of my garage and drove it back in front first. Last week I started it to check out some improvements to my custom throttle cable. This weekend was the big day to take the car on a test drive and then nothing.... No spark to the plugs, across the points or out of the coil. I bought a new coil, nothing. I have continuity from the white with black stripe wire to the pos termonal of the battery at the cut off switch. I have 12v at the pos coil terminal. New Lucas points and condensor, new cap and rotor, all NOS.
    Any way to test the condensor? I have one NOS condensor left, so I could just repkace it and see, but would like to know how to test it?
    Thanks
    Ira
    1960 AH 3000 MKI
    Ira
    Portland,OR
    1960 Austin Healey 3000 MKI
    owned since 1975

  2. #2
    Jedi Knight Keith_M's Avatar
    Join Date
    Aug 2012
    Location
    Logan, UT
    Posts
    984
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    1
    Thanked in
    1 Post

    Re: no spark

    Check the battery cutoff switch (or the wire leading to it) in the trunk.
    Keith
    '59 Bugeye (recently restored)
    '62 BT7 (recently restored)
    '65 Sprite (restored 30 yrs ago)

  3. #3
    Great Pumpkin Keoke's Avatar
    Join Date
    Apr 2004
    Location
    LosAngeles Calif.
    Posts
    12,535
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    7
    Thanked in
    7 Posts

    Re: no spark

    but would like to know how to test it?

    There are two methods:
    1: Using an OHM Meter set to a high OHMs scale connect it between the case and the lead the meter should jump and then fall to Zero . Reverse the leads and it should repeat the stated action..

    2: Connect the condenser across a 12volt source, then short the lead to the case it will generate a spark.

    Generally if these conditions are met it is OK. Excessive operating heat can cause it to fail however.
    Last edited by Keoke; 05-28-2014 at 11:47 AM.
    1966 Daimler V8 Saloon; Safely Fast, Built to Last & and; Smooth as Glass.
    1966 BJ8 [ 2 ] Lil Red & Miss bLU
    1985 XJ6 Saloon
    1948 & 70 Lincoln continentals
    1973 Volvo P1800ES

  4. #4
    Jedi Knight Healey Nut's Avatar
    Join Date
    Sep 2013
    Location
    Ottawa Ontario
    Posts
    1,148
    Thanks Thanks Given 
    2
    Thanks Thanks Received 
    12
    Thanked in
    12 Posts

    Re: no spark

    You have a bad battery switch , disconnect the small white wire with black stripe from the switch or the side of the dizzy and try again .
    "If it aint broke ....dont fix it "
    " Thats not an oil leak ..........its a special automatic British rustproofing system "
    Best Healey in show ABCD Ottawa 2013
    Best Healey in Show Boot n Bonnett Kingston 2013

  5. #5
    Yoda glemon's Avatar
    Join Date
    Jun 2007
    Location
    Nebraska, USA
    Posts
    3,280
    Thanks Thanks Given 
    9
    Thanks Thanks Received 
    5
    Thanked in
    5 Posts

    Re: no spark

    When I am stumped and the intuitive fixes that come into my head don't work (basically when all else fails and I am totally stumped) I go here:

    https://herald-tips-tricks.wdfiles.c...e%20Manual.pdf Electrical stuff explained in a pretty simple way so even I can usually understand it, and good step by step diagnostics.

    (Edit) BTW--my money is on the battery cut off switch too, mine would kill my car like that with no warning, sometimes when out and about, disabling and bypassing it made my Healey ownership happier.

  6. #6
    Jedi Knight DerekJ's Avatar
    Join Date
    Nov 2004
    Location
    Cotswolds, UK
    Posts
    1,471
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    4
    Thanked in
    4 Posts

    Re: no spark

    Check the small wire in the distributor which is very fine. It can separate inside its covering without it showing on the outside.

  7. #7
    Jedi Warrior rjc157's Avatar
    Join Date
    Mar 2007
    Location
    NY
    Posts
    510
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    0
    Thanked in
    0 Posts

    Re: no spark

    I would check the fuse see if the connections are clean

  8. #8
    Jedi Warrior pkmh's Avatar
    Join Date
    Oct 2010
    Location
    Fort Lee, New Jersey
    Posts
    455
    Thanks Thanks Given 
    0
    Thanks Thanks Received 
    3
    Thanked in
    3 Posts

    Re: no spark

    I had a similar problem where I had little spark, no spark and then a lot of spark. Yes, I too, replaced the condenser, points, rotor ignition coil wire, disconnect (and yes that setscrew is a bad design--it will severe your black and white wire every time you "lightly" over tighten it), clipped all other end wires to the distributor and then checked the carbs for fuel flow.

    Hopefully, you can still inspect your old ignition wire (using the radio reduction type) going to the distributor cap. Mine was burnt. What I did next was inspect the distributor cap's center node, that carbon spring piece. Pulled it out more so more contact was made onto the rotor. Bingo! Strong and continuous spark, car started right up. Now waiting for a new cap to come. Evidence of that problem was seeing how burnt the wire was going that carbon spring piece. Hopefully, this will fix your issue if your still have one, notwithstanding other issues.

    Paul

    PS. One other possibility that also happened to me was one of the ignition coil leads was severed, not visible from view. So you may want to check all your electrical connections. Hope all works out.

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •