Author Topic: Odd starting behaviour  (Read 406 times)

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Odd starting behaviour
« on: 30 October 2012, 08:48:57 pm »
This has been bugging me since I got Mr Noisy back in june.

a 2.25 petrol 88" series 3.

When you crank the engine over to start it, the engine turns but not a lot seems to happen, until you release the key, then the engine will fire and run.

Every other car I have ever had, you just crank the starter until the engine fires then release it.

but I get the impression Mr Noisy would crank all day with nothing happening and only fire up just as you release the key.

Any idea what might be happening?  I've got used to it now and have no trouble starting, but it just seems odd behaviour.

I've not checked anything yet (obvious test is check for spark while cranking)

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Re: Odd starting behaviour
« Reply #1 on: 30 October 2012, 08:54:49 pm »
Someone hasn't grafted a diesel "ignition" barrel in have they?  Get someone to check coil voltage when you're cranking.  :) 

Or was it a diesel at some point? 
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Re: Odd starting behaviour
« Reply #2 on: 30 October 2012, 09:01:46 pm »
my v8 did that but always started never found out why :-?
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Re: Odd starting behaviour
« Reply #3 on: 30 October 2012, 09:08:21 pm »
Shooting from the hip here but......did they fit ballasted coils around that time. This sounds like the classic symptom of the feed via the ignition switch not being connected while you crank ( and it should be!) - so once you release the key the power to the coil is fed via the ballast resistor. If someone has removed the resistor in the past then it may be that the 12v feed has also been left disconnected ...just a theory?
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Dave

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Re: Odd starting behaviour
« Reply #4 on: 30 October 2012, 09:39:31 pm »
As said it does sound like no spark whilst cranking.

You could temp wire the coil direct to the battery and see if it cures the problem, if it does start looking at where the coil is fed from.
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Re: Odd starting behaviour
« Reply #5 on: 30 October 2012, 10:04:55 pm »
Mine does exactly the same, after I changed the steering lock etc, like someone else has said, I reckon i've fitted a diesel one.  Not only does it only start on the return of the spring, it doesn't stop on the first turn but the second.  I'm getting used to it slowly, just doesn't like starting on cold mornings....

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Re: Odd starting behaviour
« Reply #6 on: 30 October 2012, 10:15:36 pm »
I think you have hit the nail on the head.  I'll get my volt meter out and also try looking for a spark while cranking.

This car was "rebuilt" about 18 months ago on it's new chassis 2 owners ago.  There are many many details like this that are wrong and I'm slowly putting them right.

If it's significant, the key barrel is very poor and fiddly. You have to push the key in to turn it the first part to turn the ignition on, then withdraw the key slightly before it will turn to the "crank" position

I just thought the coil was powered direct from the ignition and should be powered while cranking. So how does a diesel switch mechanism work then? I thought that would be the same and just shut the fuel off when you turn the key off, but would surely need the fuel on while cranking (no different to de powering the coil to stop the spark but powering the coil while cranking)

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Re: Odd starting behaviour
« Reply #7 on: 30 October 2012, 10:35:50 pm »
There is no fuel solenoid on a diesel, manual pull stop, hence no feed while cranking...

Drew 5292

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Re: Odd starting behaviour
« Reply #8 on: 30 October 2012, 11:13:02 pm »
'Tommy' started doing this a while ago, after never previously having done it with no change having been made to the petrol ignition barrel during my ownership of many years.
However, good man and tech-guru 'FenTiger pointed to it probably being a fault in the barrel (tired/knackered/malfunctioning), which was good enough for me if it came from Toby's font of knowledge. But as it's such a twat-arse job to change the two tiny grommett screws, I've simply lived with the problem.
I must get 'round to it, if only out of respect for advice given.

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Re: Odd starting behaviour
« Reply #9 on: 31 October 2012, 01:57:12 pm »
Right I've had a look and can confirm there's no power to the coil while cranking.

However, playing with it a bit more, I think it's a warn / damaged starter switch.

If I turn the switch all the way to the stop then the engine cranks but will not fire (until you release the key)

BUT if I turn the key until it cranks, then back just a little, it will fire up while cranking.

So I guess it needs a new switch, which may mean it needs a whole new unit.

So for now it will remain a "to do sometime" job as I can live with it, particularly now I've found turning the key back a little will let it fire while cranking.

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Re: Odd starting behaviour
« Reply #10 on: 31 October 2012, 02:04:12 pm »
The switch is a small unit that is held onto the end of the key barrel by two tiny cross head screws. It is possible to change it through the dash, but easier with steering wheel removed. Either way you need hands the size of 4 year old girl, and the dexterity of a brain surgeon. I have changed a couple now using my ham fists and have the scars to prove it!


Good luck!

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Re: Odd starting behaviour
« Reply #11 on: 31 October 2012, 05:39:02 pm »
To do sometime, my list is getting longer every week.  New instruction, replace temp perspex drivers window with proper. The original shattered when I closed it firmly, i'd hit the screw holding the 'fantastic. s3lub replacement channel in place,

Gonna try your, turn then back off a bit, approach..

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Re: Odd starting behaviour
« Reply #12 on: 31 October 2012, 10:23:24 pm »
It is possible one of the wires is on the wrong spade on the starter switch. I made this error on the FFR by getting a wire in the wrong place, it would spin like mad and only fire when the key returned to position 2 from position 3. Most ignition barrels have a number of options some of which aren't used, I think I got it on the one that should power the radio, usually the radio doesn't come on when cranking only when the key is released (not that a series usually has a radio but you get the idea).
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