Misfire, high revs, full throttle

[mole42]

I don't often rev mine to 4000rpm!

I do with mine!

[DJT]

I don't know if the MK1.5 has the ceramic ballast resistor next to the coil like the mk1, or the in loom ballast resistor like the Mk2

Neil,
If you are talking post LD20001 Mk1.5, then they have the resistor in the loom (or at least my late 1.5 has). A couple of years ago I had problems with this and fitted a ceramic external resistor and the problem went away. Further investigation revealed a break in the resistor wire close to the connector. I remade the connection and went back to the original, leaving the ceramic one in place ready to swap over if the problem returned. The ceramic one is now in my spares stash.

[236572J]

Yes, the car is post LD20001 so it will have resistor in the loom. (There is no (obvious) separate resistor near the coil). The problems occurred when the car got up to normal temperature so it could well be a poor connection. I will need to go back to a coil that needs a ballast if I want to use the original set up. We took the car out this afternoon and it went a whole lot better. I think I will still experiment just a little with the timing.

[Markvh]

Did the original topic poster get to the root of the problem? I'd be interested to know.

[Tim Proctor]

Louise is it a Lucas Sports coil? If it's silver it's just an ordinary one. I had similar issues with contactless electronic ignition until I changed the coil for a Lucas Sports (gold coloured). I think that the OE coils just do not have the oomph for some electronic ignitions. This is probably why Pertronix and Alden sell matched coils.

Just picked this up, sorry, wasn't paying attention. We have a silver and therefore ordinary coil. Can you tell us which Lucas Sports coil we should look for? I have to admit I'm a bit lost on the whole issue of ballast resistors and coil voltages.

Louise

[Goldstar]

this one Tim http://www.ldpart.co.uk/shop/shop.ph...caed57fd2d3b4f

[Tim Proctor]

this one Tim http://www.ldpart.co.uk/shop/shop.ph...caed57fd2d3b4f

Thank you for this, looks good

[Goldstar]

Thank you for this, looks good

No worries. I had similar symptoms recently with a powerspark coil (fitted by P.O.) that had done less than 500 miles. Replaced with a decent one and runs sweetly now

[richardthestag]

No worries. I had similar symptoms recently with a powerspark coil (fitted by P.O.) that had done less than 500 miles. Replaced with a decent one and runs sweetly now

did you fit the flame thrower Paul or a better quality ballasted coil?

My misfire was because of



done a few hundred miles, but it was all I had at the time. cheap nasty crap

Now fitted distributordoctor cap and rotor. Car performed beautifully on drive to Devon yesterday

[Goldstar]

did you fit the flame thrower Paul or a better quality ballasted coil?

My misfire was because of



done a few hundred miles, but it was all I had at the time. cheap nasty crap

Now fitted distributordoctor cap and rotor. Car performed beautifully on drive to Devon yesterday

Flamethrower in and producing nuclear fission type spark by the look of the spark checker thingy I’ve got

[thebadleys]

Flamethrower in and producing nuclear fission type spark by the look of the spark checker thingy I’ve got

Which Flame thrower did you fit Paul, the 40111 ?

Nigel

[Goldstar]

Which Flame thrower did you fit Paul, the 40111 ?

Nigel

45011 Nigel with the Ignitor 2 ignition system and i have taken the ballast out

[thebadleys]

45011 Nigel with the Ignitor 2 ignition system and i have taken the ballast out

Thanks Paul, I have Ignitor 1 but the application chart is a little confusing ( to me anyway ) as it show the same part number for both 6 & 12 Volt coils !!

I was looking at 6v 1.5 Ohm, but the 45011 is quoted as both voltages and 0 .6 Ohms, so which one to choose ???

Think I'll drop them a question for their recommendation.

Nigel


Flamethrower Chart.jpeg

[richardthestag]

I found them very helpful on the phone, went for 12v flamethrower II coil and bypassed the ballast wire. result out of the box was amazing.

[Goldstar]

I also called them NIgel just to be sure.

Phone: 01276 65554