I have a 1998 106 with a 1.5 D engine with 110,000 miles on the clock.
Although the glow-plugs are all working properly, the engine requires a lot of cranking before it actually starts.
Previously, once the glow plug light had gone out it would fire on the turn of the key. Now I have to crank it over between 5 and 10 times before it goes.
Can anyone point me in the direction of the cause of my problem?
Out of interest, how do you know for sure the glow plugs are working properly? Could it be that they need replacing? Or have you had them recently replaced? If the engine runs absolutely fine, fuel economy is as normal etc etc., then it could well be the glow plugs. Has it exhibited this problem all of a sudden, or has it been gradual? Don't know why I'm asking as I've got no idea exactly how quickly glow plugs pack up (would have thought it'd be gradual).
As mentioned in another post, are you sure the glow plugs are okay? One way to test is to wait till the glow-plug light goes off, turn ignition off and immediately turn back on to operate glow-plugs again before trying to start it. If it starts much quicker you can probably assume that at least one plug is malfunctioning.
It does not seem to make any difference whether I try to start after the first time the glow-plug light has gone off or the tenth time. It still requires a lot of cranking.
If the glow plugs aren't working, then you can wait for the glow plug light to go out as many times as you want, and it still won't make a bit difference.
From what you say, it does sound like it's the glow plugs that are faulty. Normally glow plugs fail one at a time. You might not notice much difference after one glow plug fails, but normally notice a bit difference when two go. When a third one goes, starting normally becomes difficult. First thing to check is that the glow plugs are getting a 12v feed, when the ignition is first switched on. If you aren't getting a feed, then it maybe one of the glow plugs has developed a short circuit and blown the main feed fuse for the glow plugs, or the glow plug time control relay is faulty. If you are getting a feed at the glow plugs, easiest way to check the glow plugs is to disconnect the wiring from the glow plugs, get a bit wire, connect one end to the battery positive terminal, and touch the other end onto the glow plug terminal a few times. If the glow plug is working, you should see a small spark as you touch the wire on. If there is no spark, then it is likely the glow plug has went open circuit.
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