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I was checking my glow plug relay earlier when I thought I'd check the voltage at my glow plugs.
With ignition on, 12.3v appears and slowly drops to 11.9v over about 18 seconds, then the relay switches off as expected and the voltage drops to 0v.
When I start the car though, and it's running, I get 12v at my glow plugs? regardless of engine rpm or temperature. What am I missing here or is this normal, does anyone know why?
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Glow plugs can stay on for a few mins after starting the engine
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(12-01-2014, 05:22 PM)zx_volcane Wrote: Glow plugs can stay on for a few mins after starting the engine
On a hot engine though?
I'll go for a drive and check them before I switch off.
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yup, can do
mine does
not sure that it should, I wouldn't have thought so, but perhaps the temp signal isn't getting to the glowplug relay, it should take that amongst other things into account to decide how long to leave them on I think.
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Yeah that was it, on for 2 minutes after starting
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dont the later relays drop to 6volts after like 30seconds and then stay on for a minute or two?!
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(12-01-2014, 09:51 PM)Piggy Wrote: dont the later relays drop to 6volts after like 30seconds and then stay on for a minute or two?!
Mine gives the full 12V for a few minutes. It looks the same system as my old 1.9 XUD in the 405, that's why I posted in this section
Never mentioned my TUD
That could be the case though
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Once running the cycle on / off until the second temp sensor in stat housing (connected to glwplg relay) comes up to temp.
Voltage just dropping as your pulling from the battery, stops once alternator is up.
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I knew about the voltage thing
i had no idea the plugs cycled with the engine running. I take it the idle quality is affected?
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