diedel geeks not starting when cold

[dransy]

Are lasses 1.9 soda fabia sdi isn't starting when its cold out , it did this last year so u got a battery from my mates Renault espace a year later this cold morning was about minus 2 and it won't start again .

I know for a fact when I get home and its a few degree warmer it will start straight up .

Can anyone tell me what's going on.as it makes her late.for.work quite often .

Cheers
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[Islander]

Glow plugs?

[Shaft]

Glow plugs, multiple or total failure.

Could be the plugs or the control unit, needs a diagnostic ideally.
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[dransy]

Don't know much about diesels should I just change them ? I presume you change em like spark plugs ?
____________________
Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles

[Islander]

I'd check that the glow plugs are getting 12v from cold initially. It's not unknown for the control relay to fail. You can do a resistance check on them - it may only be one or two that have failed although checking current flow is the approved way.

This may help:

https://www.ngk.de/en/technology-in-detail/glow-plugs/maintenance/testing-glow-plugs-the-right-way/

[dransy]

thank you sir , what do I set my multi meter to ? I've only used it to check the power of batteries
____________________
Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles

[Islander]

[WD Forte]

Yep
As above, sounds like glow plugs, thats the most common reason.
Some indirect injection lumps ( like in my van) just wont play unless the glow plugs are AOK.

Just to add to the testing tip
Each one should have a low resistance in the range Islander mentioned but be aware thats each plug on its own
and not connected to any other
so to test each one, you'll need to remove the heavy cable connecting them together.

just in case you dont know.

Most deisels have a yellow light on the dash that glows
when the relay is providing power to the glow plugs.
This shortish period is when you can do the voltage test on the supply cable to check the relay is working
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[Wabby]

Faulty CTS if plugs check out OK.

Moder diesels rely on them far too much.
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What restriction?

[dransy]

Replaced all the plugs yesterday 3 of them looked knackered juiced up the battery and it started like a champ this morning
____________________
Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles