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+--- Thread: Glow plugs quit on me... (/showthread.php?tid=1015)
Glow plugs quit on me... - Secondaries - 01-09-2010
My problems started a couple weeks ago when the weather started getting colder. It took a few cycles of the ignition switch to get the preglow lamp to even come on. Then I'd cycle it a few more times to get a good hot start. As of Thursday, however, no amount of cycling will get the preglow lamp to light. I thought it may just be a burned out lamp bulb, but even after 10 cycles, the engine just lugs over without starting. Interestingly, the preglow lamp does light up when I unplug the relay power plug from the box behind the headlight.
The 80A strip fuse is fine. I've been assured the plugs are relatively new. That just leaves the relay. Am I missing something? Or should I just go ahead and buy a new relay?
RE: Glow plugs quit on me... - ForcedInduction - 01-10-2010
(01-09-2010, 10:08 PM)Secondaries It took a few cycles of the ignition switch to get the preglow lamp to even come on.Thats a pretty good sign the relay is dying.
Quote:Then I'd cycle it a few more times to get a good hot start.There is no point in doing that. The light does not determine how long they will glow, the plugs stay on from when you turn on the key until you crank the engine (or 35-60 seconds, whichever comes first).
RE: Glow plugs quit on me... - Secondaries - 01-11-2010
A followup post. I swapped my preglow relay with a friend's known working one, and I'm having the same problem. No preglow lamp at startup, but it does light like normal with the power-to-plugs socket unplugged.
Where do I look next? Bite the bullet and buy new plugs?
RE: Glow plugs quit on me... - Jambo - 09-07-2010
(01-11-2010, 05:45 PM)Secondaries A followup post. I swapped my preglow relay with a friend's known working one, and I'm having the same problem. No preglow lamp at startup, but it does light like normal with the power-to-plugs socket unplugged.
Where do I look next? Bite the bullet and buy new plugs?
My 290 G is also having problems with the glow plugs.
As far as I know when the Glow light does not light up at start up it indicates one or more glow plugs as being faulty.
Once I have started the engine the glow light does come on for a while.
I have measured the resistance of the glow plugs (should be very low ie. 2ohm) and mine seems to show that I have 3 faulty glow plugs (in the kOhm range).
I would measure the resistance af the glow plugs and replace the faulty one unless you can afford to get the set.
RE: Glow plugs quit on me... - winmutt - 09-07-2010
Slightly old post.
290G? What engine is that?
RE: Glow plugs quit on me... - Jambo - 09-09-2010
ooops did not look at the dates.
290G = 290 GD Merc Gelaendewagen.
But, maybe this post will help someone with a smilar problem.