bigbravedave
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| posted on 11/12/08 at 10:39 PM |
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Tin top Question Golf mk3 tdi glow plug problem
Quite simple really, glow plugs are not getting hot. Its a simple circuit, the temp sensor tells the ecu its cold, the ecu energises the glow plug
relay for the correct duration, the glow plug light goes out, then you crank. but its taking a few seconds and chugging at less then half the idle
speed before I hear a relay click and it idles perfectly.
I have new glow plugs fitted, when you disconnect the temp sensor, the ecu defaults to maximum plug duration 20 seconds, on the multimeter the buz bar
seems to be getting 8v then it slowly raises to 11.7v just before the 20 secs is up. I have pluged in a spare plug and keyed on with the temp sensor
disconnected, the glow plug light comes on but the glow plug fails to get hot.
I have replaced the main engine earth.
I have also tested the glow plug relay on a battery with a continuity tester on the switched side at it energises ok and switches, but is does need to
shunt 35amps or so
all I can think to do is replace (£17!) the plug relay that appears to function on the off chance its latching but not shunting enough current,
Any ideas what I can try next!
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theconrodkid
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| posted on 11/12/08 at 10:49 PM |
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where are you earthing your tester?the engine has a lead that earths to the body/battery as well,check that for con
who cares who wins
pass the pork pies
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tomgregory2000
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| posted on 12/12/08 at 10:29 AM |
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is the battery is in good condition?
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