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glow plug relay and timer

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glow plug relay and timer

Postby skyna » Sun Oct 29, 2017 8:00 pm

Hi, Can anyone tell me where the glow plug timer and relay is on a 1992 Isuzu Mu, Dash glow light only stays on for .5sec then go,s out before starting. Mu will start first click but blows smoke an runs little rough till it warms up, I cannot hear any relays clicking before or after start, any help would be great,Cheers
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Re: glow plug relay and timer

Postby geeves » Mon Oct 30, 2017 4:41 am

Thats normal on that engine. Dont know where the timer is but its controlled by one of the sensors in the thermostat housing . Only has 2 positions. Above 5C you get the short glow (flash) below 5C you get 20 to 30 seconds glow.
(this also sets the timeing to advanced when coolant is below this temp)
Sanding your knuckles before starting work can help. That way you cant skin them
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Re: glow plug relay and timer

Postby Ricardo999 » Sat Nov 04, 2017 8:17 am

1996 EFI Bighorn. Short glow time when engine warm is an age old issue. I looked high and low - thought about putting in relays to fool the temp sensor that the engine was cold etc etc. Ended up putting in a relay with a push button in the plastic fascia below the dash that connects the battery to the glow plug cable (located just above the window wiper motor). I hold the button, count to 5 and voila! Fires up in half a turn when hot. Wish I had done this years ago. Cost- about $5 with a relay, some thick cable and a push button off AliExpress. You will need a 50A or 70A relay - the power draw is 40+ amps. I sat the relay in the under bonnet fuse/relay container, plenty of room.
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Re: glow plug relay and timer

Postby geeves » Sun Nov 05, 2017 6:06 am

hot engine shouldnt need glowing even indirect diesel. If you are having hot start issues you should look elswhere although the computer controls the injection so it could be one of a number of sensors. Your answer if it works is probably the cheapest
Sanding your knuckles before starting work can help. That way you cant skin them
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