hot starting

[ken foster]

hi all, my 6 has been cutting out when hot or refusing to start after a period of heat sink after stopping. I have replaced leads which were tracking.I was wondering if the problem could be the coil or my metering unit which although rebuilt is not unleaded type. So could the shuttle be seizing due to lack of lubricant in the fuel,I use unleaded with castrol additive.I know i'm not alone with this problem but there are different causes and slightly different symptoms. Any ideas welcome thanks.

[stuart]

Ken

Best to go through it methodically changing one thing at a time so you know what has fixed it but i would start with a known good coil.

Stuart.

Edited January 15, 2007 by stuart

[ken foster]

Ken

Best to go through it methodically changing one thing at a time so you know what has fixed it but i would start with a known good coil.

Stuart.

Thanks Stuart,regards ken

[RogerH]

Hi Ken,

whilst attacking the coil don't forget the capacitor/condenser in the distributor - these can go temperature sensitive.

 

Roger

[ken foster]

Hi Ken,

whilst attacking the coil don't forget the capacitor/condenser in the distributor - these can go temperature sensitive.

 

Roger

Thanks Roger, I forgot to say I replaced the capacitor,rotor arm and dizzy cap for new items. Regards ken.

[Richard Crawley]

Ken

You need to establish if it is the electrics causing problem or the fuel system; have you carried out a basic check for sparks when the problem occurs? Once you’re satisfied it’s not the ignition system then it could be one of a number of problems with the PI.

 

It won’t be the shuttle seizing as this is a relatively loose fit in the rotor; the rotor itself runs a much finer tolerance but if that seized, I doubt it would ever run again; I’ve not heard of any seizure problems for a long time. Apart from the remanufactured M/U’s being sold with new shuttle/rotor units, the only difference between a leaded a & U/L M/U is the rubber used for the seals (Viton). I’m undecided if the remanufactured units (2 x the price) are good value or not & I’m currently running a Prestige U/L unit which uses the original rotor shuttle, I’ve not had any problems to date.

[ken foster]

Ken

You need to establish if it is the electrics causing problem or the fuel system; have you carried out a basic check for sparks when the problem occurs? Once you’re satisfied it’s not the ignition system then it could be one of a number of problems with the PI.

 

It won’t be the shuttle seizing as this is a relatively loose fit in the rotor; the rotor itself runs a much finer tolerance but if that seized, I doubt it would ever run again; I’ve not heard of any seizure problems for a long time. Apart from the remanufactured M/U’s being sold with new shuttle/rotor units, the only difference between a leaded a & U/L M/U is the rubber used for the seals (Viton). I’m undecided if the remanufactured units (2 x the price) are good value or not & I’m currently running a Prestige U/L unit which uses the original rotor shuttle, I’ve not had any problems to date.

Excellent feedback thanks Richard

[Andrew Smith]

Hi Ken

 

I had similar symptoms on one of my 6s in the 80/90s, it turned out to be the original inertia cut off switch on the bulkhead sticking open (albeit only marginally) – but it’s worth testing it.

 

Cheers

Andrew

Edited January 16, 2007 by Andrew Smith

[davehop]

Hi Ken

 

I noticed in one of your replies that you have replaced the dizzy capp, condenser, and rotor arm. this could be the problem. There was a thread relating to poor quality replacement rotor arms and dizzy caps a few weeks ago that made enlightening reading. Here's the link

 

http://www.tr-register.co.uk/forums/index....tributor+doctor

 

best

 

 

Dave

[Andy Moltu]

I'd go with Ken - sounds like a dodgy rotor arm - there are loads of new rotor arms which are poor quality and have been responsible for lots of breakdowns!

[JohnC]

...and there's an ad in TRAction 216 for rotor arms, claiming better quality than some other repros. Dunno - maybe worth a look?

J

[david ferry]

That will be for Distributor Doctor (aka Martin Jay). I would trust Martin to be providing parts of a very high quality. If you have ignition electrics problems, Martin is the person to sort them out.

 

In case you don't have access to his details, his phone number is 01398 361678.

 

David

[ken foster]

Hi Ken

 

I noticed in one of your replies that you have replaced the dizzy capp, condenser, and rotor arm. this could be the problem. There was a thread relating to poor quality replacement rotor arms and dizzy caps a few weeks ago that made enlightening reading. Here's the link

 

http://www.tr-register.co.uk/forums/index....tributor+doctor

 

best

Dave

Thanks Dave, the rotor arm and dizzy cap were replaced to try to cure the problem.They were Lucas spares I've carried since 1990. I read the link too,it doesn't surprise me there are dodgy electrical perts around ,I had a rotor arm (from Moss) cause my wifes MGB to non function.