28 replies to this topic

[1984mini25]

Mini won't start after work done

Its got fuel
Turns over, choughs occasionally but no pulse

Tried:
Choke out
Choke out, throttle open
No choke, throttle open
Re checked points and firing order
Tried moving the dissi slightly but all that did was either backfire louder or not at all
Tried adjusting the mixture, still no joy

Is there and default settings that I could try for the carb to see if that helps it to start?

As part of the work done I did replace the
Points and condenser and Spark plugs all set as per the Haynes manual
Witch worked fine the last time I changed any of these items

Any input would be a great help
As I going to give it another try tomorrow with a fresh battery

Thanks,
Karl

Edited by 1984mini25, 28 February 2006 - 04:34 PM.

[Sprocket]

Is the firing order on the dizzy correct????

[syholl]

Definitely sounds like you have the HT leads on incorrectly.

No 1 cylinder (closest to the radiator) should be about 2 oclock on the dizzy, then anti-clockwise it goes 1 - 3 - 4 - 2....

Double check that. The fact that it is backfiring suggests that there is a healthy spark there, just not in time....

[1984mini25]

The fact that it is backfiring suggests that there is a healthy spark there, just not in time....

Should be with a new coil only (done 1k), points and condenser, dissi cap, rotor arm, Ht leads and spark plugs

[1984mini25]

Ok,
Tried the firing order and reset dissi
Lined up timing marks for TDC on cylinder 1 and set rotor arm to point at no1 Ht lead on the dissi cap with the points open

Re-tried..... Nothing just bangs, still no pulse :'(

Re-moved no1 spark plug to see if I had a spark..... Nothing :'(
Checked connections to coil and re-tried..... Nothing :'(
Changed to old coil that was known to work..... Nothing, so changed back
Checked all connections and cleaned earth points that I could find..... Nothing :'(

Tried jump starting it with my dad’s car, turned over faster and that’s about it

Is there any thing I can do for tomorrow after I have popped down to Hal fords for a fresh battery, as that is now dead?
As I’m running out of ideas and interest in it

Thanks,
Karl

[pikey7]

Have you checked the low tension connections to the dizzy? If you can, get a multimeter across them and try starting and see what it does. Make sure you have the connections on the right way round, and also the dizzy is connected to the coil properly.

[1984mini25]

If you can, get a multimeter across them and try starting and see what it does

If I use a multimetre what should happen?

The dizzy as far as I know is connected to the coil properly as that was one of the connectors that fell off when I was taking it apart
I made sure all the connections on the right way round as when I took everything apart I labelled all the wires as I took them off as not to get confused

Even tried cleaning the mating surfaces of the dissi and block to see if there was an earth prob there

[syholl]

You say you aren't getting a spark at number one, are you getting a spark at any of the others....?

It should still start on three really, unless the timing and fuelling are way out...

You must be getting a spark somewhere if its backfiring.

[nev_payne]

pff beats me....your sure there fuel in the system for the sparks to ignite? Could try removing the air filter to get more air in for a bit more push? Check over battery as well.

[1984mini25]

You say you aren't getting a spark at number one, are you getting a spark at any of the others....?

ermm will have to try that
Got a spare set of ht leads somewhere (just can't find them for looking) so I can try that

sure there fuel in the system for the sparks to ignite

Drained the tank completely and re-filed with a can of fresh fuel
Air filter was off and took the dashpot off to find the inside of carb was wet so it must be getting fuel
Can also smell it out the exhaust

[pikey7]

chance are if it's not starting, and there's no spark on one plug, then none are sparking, but check them anyhow to be sure.

You should see 6-12v across the terminals. It depends if it's ballasted or not (I suspect it is, so it'll be more like 6v)

It does sound like you have fuel, so I wouldn't worry about that. It's either gonna be timing or spark. I'm not convinced that the method you've used to set the timing is absolutely right, but that won't give you no spark, it'll just spark at the wrong time, and eave it running bad, but it sould run!

When you say you removed the plug to check the spark, you did still have it touching the block right?

[1984mini25]

I'm not convinced that the method you've used to set the timing is absolutely right

But it should start at least so i can get it to run and set with timing light
Same with fuel

When you say you removed the plug to check the spark, you did still have it touching the block right?

Yep, held it touching the block so it was earthed

Is it me or does this mini really hate me?

[syholl]

If you have drained the tank, you will have let all the crud that usually floats in there settle on the bottom of the tank. Some of this may well have gone into your carb and partially blocked it.

Pour a little petrol into the mouth of the carb and try and start it.

[pikey7]

I have one word for you. Lucas.

Your Mini doesn't hate you, it hates it that some scumbag equiped it with Lucas electrics!

[1984mini25]

I only drained the tank because the fuel in there had sat for nearly 2 months
And I was under the impression that fuel goes off after a while