70 mph (honest ) on the M25 friday evening. All of a sudden no engine . Alturnator light on. Prior to that everything had been fine and all dials saying what they should.#
On the hard-shoulder it will chugg over but not fire at all. Automatically assumed that it was related to the imobillisor that I had just had fitted so AA recovered me home. (Not bad going having only had the car less than a week and it has already left me stranded on the hard-shoulder )
Next morning I go out to see if I can sort it out/ring the fitters who did the imobillisor and the blooming thing starts first time It turns out it is nothing to do with the imobillisor as that would have meant it wouldn't even have turned over. With it working it is hard to identify what the problem and it has not happened since.
I assumed that the coil must be on it's last legs and had just got to hot and given up. A night of cooling down restored it and hence it started the next morning. Any other likely reasons? Is there anything else in the ignition that would stop and then start working?
Oh, and it never seems to have trouble with hot starting so I am discounting that as the cause on the hard-shoulder.
Cheers,
W.Nut.
Dodgy Coil?
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- amarshall
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Dizzy cap, HT leads, ignition amplifier, rev. limiter are all possible sources of electrical failure and *could* exhibit the symptoms you suggest.
Usual advice is to start with the cheapest/easiest and work from there.
Usual advice is to start with the cheapest/easiest and work from there.
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SORN - just say NO!
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I had a similar problem this year ( see link)Conclution was ignition modual but before you go to the expence of changing stuff (as I did) Roberts advice seems good to me.
Cheers,
Phil
I had a similar problem this year ( see link)Conclution was ignition modual but before you go to the expence of changing stuff (as I did) Roberts advice seems good to me.
Cheers,
Phil
I've had two ignition modules (in the dizzy) fail over the years, the first had fractured wires where the dizzy base plate rotates with the vac advance - this caused a misfire as throttle position (and hence vac) changed. The second shorted out internally as the engine warmed up - reduced coils = reduced induced EMF = voltage too low to trigger the ignition amp.
If you repeat the hot / cold problem, you could stick a voltmeter (low AC range) on the input to the ignition amp, watch the voltage at crank revs when cold and hot/not starting. Any significant difference indicates bad connection / ignition pickup issue.
If you repeat the hot / cold problem, you could stick a voltmeter (low AC range) on the input to the ignition amp, watch the voltage at crank revs when cold and hot/not starting. Any significant difference indicates bad connection / ignition pickup issue.
- Wingnut
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Thanks for all the advice chaps.
I had checked all continuity and usual culprets on saturday and not found anything untoward. As I said it is obviously going to be hard find a fault when it is intermittent. I will get a replacement coil to carry in the boot incase it happens again. Any idea of a source and price for an ignition module if is turns out to be the same problem as Tanz?
Cheers,
I had checked all continuity and usual culprets on saturday and not found anything untoward. As I said it is obviously going to be hard find a fault when it is intermittent. I will get a replacement coil to carry in the boot incase it happens again. Any idea of a source and price for an ignition module if is turns out to be the same problem as Tanz?
Cheers,
- robertverhey
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