Doblo glowplug warning light

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Doblo glowplug warning light

drsniff666

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Just bought a 2006 doblo 1.9 multijet and the glowplug warning light flashes for a good while after start up. Does this mean new glowplugs needed or an expensive electrical fault? Engine starts fine,any advice very welcome.:(
 
Hi mate and WELCOME TO THE FORUM :wave:

As you say, the flashing glow plug light indicates a fault in the pre heat system. It's NORMALLY caused by one or more failed/ weak glow plugs, but can also be caused by a faulty pre-heat control box or wiring fault.

Chances are though, that it's just a failed glow plug or two.

Alan
 
By all accounts, the 8v is a bit of a bugger to do the glow plugs on! (n)

If memory serves, they are somewhere near the fuel rail, down between the rocker cover and the inlet manifold. The feed wires just pull off the top of each glow plug. 7mm deep socket to unscrew the plugs.

Tip is to spray in some 3 in 1 oil using a long reach nozzle attachment (red around 4 inch long) and leave to soak overnight.....
 
I'm sure there's a test you can do with a multi-meter to test the low voltage back from the glow plugs. IIRC it's a matter of taking a low voltage reading on the individual glow plug wires from the glow plug relay under the bonnet.
Should it prove that the glow plugs do need changing it goes without saying to do all four. Number 1, nearest the cam belt end of the engine is the hardest to get at, but it's a matter of a long reach socket with flexible connections and extension bars. I did mean with my 1/4" drive socket set. You'll also need a pair of long reach pliers to get the leads on and off the top of the plugs. Another tip is to put some blue tac into the socket, it helps withdraw the old glow plug after it as finally been unbolted.
Last but not least, I did read on one of the old post to take the rocker cover off to give better access. My advice is DON'T, it made to no difference to accessability plus you've got the aggro of buying a new rocker cover gasket and fitting before putting the cover back on.
 
check glow plugs by resistance.

I have 2 doblos and both have flashing glow plug lights after start up and have been like this for 2 and 4 years respectively, Doblos start easily and unless you live in a really cold climate or starting problems arise then (personally) i'd leave it. If you are going to change them then change them all at same time.
 
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