Starting problem

Freddie17 said:

If it’s getting worse as it gets colder, then i’d definitely be looking at the plugs first and confirming, before looking elsewhere.
Do you know for certain it had the correct new ones fitted, or did someone tell you it has?

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Garage confirmed it was 5v ones. From memory 12v ones have a different fitting and wouldn’t fit anyway. Could the harness be an issue?

Camper942 said:

Garage confirmed it was 5v ones. From memory 12v ones have a different fitting and wouldn’t fit anyway. Could the harness be an issue?

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What you could do with knowing is the current for each glow plug. If using clamp on meter that would prove connection and glow plug heating up.

Camper942 said:

Garage confirmed it was 5v ones. From memory 12v ones have a different fitting and wouldn’t fit anyway. Could the harness be an issue?

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Hi

The starting should not be a problem with the current outside temperature.

Glow plugs are always condamned without any trial !
When the glow plugs are heating up, the battery voltage should drop.
You can also test the resistance of the glow plugs, you should get very low ohm value.

Also don't change glowplugs only for changing them, sometimes you get no luck and a glowplug break.

Some jackass used to test glow plugs with one hand on the battery and the other hand on the glowplug.