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Coil Light flashing

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DelShaw
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Joined: 25 Jul 2014
Posts: 16
Location: Shetland

PostPosted: Sat Nov 22, 2014 16:54    Post subject: Coil Light flashing Reply with quote

Hi, I have a 2003 3L diesel Isuzu Trooper with a flashing coil light and a check engine light on. The engine will not start. It seems to be intermittent however as sometimes the coil light does go out and the engine will start, other times the light comes on and the engine cuts out whilst idling. I am not sure if this is related to my putting fuel into an almost empty tank but that is when it first started a couple of days ago. I live on a remote island and our fuel comes in 200L barrels, and thus the fuel can sometimes contain flakes of paint from inside the barrel. My Trooper was running poorly shortly after filling up, so I changed the fuel filter and it seemed to be running fine, but only for a few miles before the glow plug light came on and the engine cut out. I managed to get going again and got home, then it all seemed fine the next time I went out. It started fine when I used it this morning and only drove a couple of miles but I can't get it to start now. Are the two problems related or is this just a coincidence. How do I solve it, not being much of a mechanic......I don't even know where the glow plugs are!!?
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PostPosted: Sat Nov 22, 2014 16:54    Post subject: Google Ads keep this community free to join!


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eithan h
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PostPosted: Sat Nov 22, 2014 19:18    Post subject: Reply with quote

sounds more like an ecu issue, if you remove the smaller plug in the ecu does one of the pins look burnt?
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DelShaw
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Joined: 25 Jul 2014
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Location: Shetland

PostPosted: Sun Nov 23, 2014 11:44    Post subject: Reply with quote

Thanks Ethan, what is an ecu? What does it look like? Where would I find it?
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DelShaw
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PostPosted: Sun Nov 23, 2014 11:45    Post subject: Reply with quote

Sorry, Eithan!
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eithan h
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PostPosted: Sun Nov 23, 2014 11:52    Post subject: Reply with quote

It's the big silver metal thing in between the air filter housing and the battery on the passenger side, pull the rubber boot back and remove the red lock tab then you can pull the plug out
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DelShaw
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Joined: 25 Jul 2014
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Location: Shetland

PostPosted: Mon Nov 24, 2014 0:07    Post subject: Reply with quote

Thanks. There appears to be three connections with rubber casing on top of the "big silver thing". Which one do I remove? I tentatively tried them all but didn't want to break anything.
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eithan h
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PostPosted: Mon Nov 24, 2014 0:51    Post subject: Reply with quote

the smaller one nearest the wing
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DelShaw
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PostPosted: Mon Nov 24, 2014 12:22    Post subject: Reply with quote

Hi Eithan, no luck, the pins all look pretty shiny!
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eithan h
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PostPosted: Mon Nov 24, 2014 20:59    Post subject: Reply with quote

how does the coil light flash at you? i've never seen one do it before and i've seen a few troopers!
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DelShaw
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PostPosted: Mon Nov 24, 2014 23:01    Post subject: Reply with quote

Its a slow flash, on for maybe a second, off for 2-3 seconds, on for a second....
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eithan h
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PostPosted: Tue Nov 25, 2014 0:17    Post subject: Reply with quote

Can you hear a click from the passenger side like a relay clicking when it's flashing?
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DelShaw
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Location: Shetland

PostPosted: Fri Nov 28, 2014 13:05    Post subject: Reply with quote

Hi Eithan, sorry been away for a few days. Got back today and tried it to see if it had miraculously fixed itself......and it seemed it had! The coil light came on for c8 secs and went out normally and the engine started. I left it idling but after a few minutes it cut out again. It then reverted to the flashing sequence (on for half a second, off for 3-4 seconds) with the check engine light on and flickering in time. I left it off for an hour and tried again.....and now the coil light does not even come on.
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DelShaw
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PostPosted: Fri Nov 28, 2014 13:09    Post subject: Reply with quote

......not sure if there was a click or not, certainly not now it doesn't light up!
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eithan h
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PostPosted: Fri Nov 28, 2014 20:12    Post subject: Reply with quote

im thinking ecu might have gone kaput
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DelShaw
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Location: Shetland

PostPosted: Sat Nov 29, 2014 18:45    Post subject: Reply with quote

Oh dear, is that an expensive repair?
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