Im after a bit of advice if possible chaps, typically im skint and the van is up for mot, i fired a new set of glow plugs into her last week (2.5tdi acv) as this time of year it becomes a pain in the ass to start.
Now heres where im at, the last few mornings its been cold ish, if i let the glow plugs go out once, the light literally stays on for 1 second, crank it and she'll fire right up after about 8 seconds cranking, this morning i cycled the plugs 3 or 4 times and she fired up instantly. My question is this, is there a temp sensor that tells the circuit to fire the plugs for a length of time dependent on how cold it is? the glowplug light goes out after a second no more even when really cold, ive done winter after winter, setting fire to it, cranking the out of it, cycling it, but have never ever got the issue sorted. I know the plugs work, its just the length of time they need to stay on isnt enough, or is it more a case of getting the timing checked? or the engine is getting tired.