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Is it bad to leave glow plugs on.
by
Ian0391
on 16 Dec, 2014 22:33
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Hey guys, I have a 1.6td and the glow plugs are on those own circuit with a switch on the dash. I Stoll have the stock fuse before the buss bar though. Tonight I started my far and for some reason, the first time since I rewired them a year ago, I forgot to turn off the flow plugs. I was letting it warm up then when I got in 5 minutes later I realized they were left on. I feel so dumb for forgetting. So how much damage did I do?
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#1
by
libbydiesel
on 16 Dec, 2014 22:55
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If you leave the glow plugs on they will burn out much more quickly. Otherwise, no damage. I would never install a toggle switch for glow plugs. IMO you should use a momentary switch instead.
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#2
by
sgnimj96
on 17 Dec, 2014 21:11
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#3
by
derf_kcire.XXII
on 18 Dec, 2014 13:47
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Not soo much damage done I reckon, but if you were to have a lame battery running the systems then it could of been an issue. The relay concept seem appropriate though, for the functionality of automated operation.
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#4
by
burn_your_money
on 03 Jan, 2015 11:26
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If you have Bosch duraterms they are self regulating and you did no damage. Any other brand and you'll have to pull them to check.
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#5
by
acidtonic
on 03 Jan, 2015 11:55
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If you have Bosch duraterms they are self regulating and you did no damage. Any other brand and you'll have to pull them to check.
This. I put duraterms in a car that had 4 bad plugs and a slow relay. Either way I had to get new plugs but since the duraterms are self-regulating they can be used in the 20-second relay and not burn out without switching to a fast system. All other plugs can't take 20 second relays and burn out quickly.
Also the newer cars run the plugs for the first few minutes of operation to reduce smoke. So 5 minutes is not a big deal for a duraterm. Watch out for fakes though.
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#6
by
TimpanogosSlim
on 03 Jan, 2015 13:25
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Momentary switch and the cheapest starter solenoid you can find
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#7
by
rabbid79
on 03 Jan, 2015 15:02
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I have found that the most elegant, reliable, and affordable solution is to simply install a "Normally Closed" momentary push-button switch in series with the wire that goes to the head temperature sensor. When the relay doesn't see a signal from this sensor, it defaults to coming on for something like 30 seconds. So when you turn the ignition switch to the 'On' position, just hold the button down for however long you feel is necessary, and the glow plugs will come on during that time. Otherwise, just leave the button alone and things will function 100% normally.
Granted, this isn't a solution if you're looking to leave the glow plugs on for an extended period of time, but it's especially useful for "lukewarm start" problems where the temp sensor thinks the glow plugs aren't necessary, but the engine isn't really warm enough to start without them.
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#8
by
fatmobile
on 04 Jan, 2015 17:07
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Sometimes it's nice to have glowplugs run for awhile after the car starts.
I heard the ecodiesels run for a couple minutes. Can anyone confirm this?
Rabbid's method won't allow us to lengthen the afterglow.
I just rigged up a stock glow plug relay to a push button so I could run it after starting.
I used it to connect 12 volts to the red/black wire that comes from the starter (so the glow plugs are on while the starter is turning).
I had to put a diode between the relay and the starter so the starter wouldn't turn when I pushed the glow plug button.
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#9
by
vanbcguy
on 04 Jan, 2015 18:07
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I believe the Ecos do run their plugs longer. The AAZ cars definitely do, it helps reduce smoke during warm-up.
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#10
by
RustyCaddy
on 05 Jan, 2015 04:17
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The early Rabbits have an afterglow circuit that runs for 5-10 seconds post ignition. There is a short piece of wiring that gets connected to the loom to do this and not all looms have this piece.
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#11
by
Dub_monster
on 18 May, 2016 20:20
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I set mine up on a momentary switch with a 70amp relay direct to the battery from what I found is they draw 60amps, so make sure you get a larger relay!