JTD 16v difficult cold starting even with new glow plugs?! - Alfa Romeo Forum
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Hmmm JTD 16v difficult cold starting even with new glow plugs?!

My JTD takes ages to turn over the first time I try to start it in cold weather, but will usually start fine for the rest of the day. When it finally kicks into life there is a cloud of whiteish smoke but then idles and runs as normal. The glow plugs were changed before xmas but this has had no effect. Any ideas? Had the same problem last year but just put up with it...
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how do you start it

turn to MAR wait a few secs then turnover

or just try to turn over?
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Originally Posted by NineOneSix View Post
how do you start it

turn to MAR wait a few secs then turnover

or just try to turn over?
Yes, wait for the glow plug light to go out then start... Have tried repeating the first two steps a few times before starting and this seems to help slightly.
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then the only thing I can think of could be that the batt isn't 100% but don't take my word for it as I know f'all about diesels
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then the only thing I can think of could be that the batt isn't 100% but don't take my word for it as I know f'all about diesels
Lol. Well the green LED on the battery is illuminated so that would suggest it is a healthy battery? I wondered if it could have anything to do with one of the relays? HAve checked the fuses and all seem fine. Thanks the posts.
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Ok just put the car to bed for the night and it barely started (first start of the day I might add). Engine turns fine but just takes ages to start and this time took a few attempts. Anyone have any other ideas? Battery LED still showing green btw...
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My car also takes about 2 seconds of cranking to start. Once it starts it is fine, usually.
Only started to happen in the last couple of weeks.
The cranking sound isn't as strong as usual.
Think it might be my battery though. The green battery check thingy is not green , but black.
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Please delete this... double post...

Last edited by TribesMan; 04-01-10 at 08:23.
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There is a way to check the state of the battery using a voltmeter.

After a long drive (to make sure that the battery is fully charged) leave the car standing ~12 hours (over night).
Then measure the "open circuit voltage". Dont turn on the ignition! Just open the bonnet and measure the voltage. For the best measurements you should disconnect the cables from the battery to ensure there is absolutely no consumption from the car.
Measured voltage shows "state of charge".

100% - 12.65V
75% - 12.45V
50% - 12.24V
25% - 12.06V
0% - 11.89V

Your battery should keep at least 75% state of charge. If it is under that that is a sign that the battery is worn.
But those voltages are only valid at 20C. If it is colder outside, then you must substract 0.022V/C from your measured voltage.
So for instance, if there is 10C outside, and you measured 12.3V with your voltmeter you should substract 0.22V. So the corrected value is 12.08V. And that is lower than 50% state of charge... time to think about new battery.

Last edited by TribesMan; 04-01-10 at 08:22.
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Wait about 10secs before you start the car ignition on -then keep clutch pedal down start car. Works for me everytime
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Quote:
Originally Posted by TribesMan View Post
There is a way to check the state of the battery using a voltmeter.

After a long drive (to make sure that the battery is fully charged) leave the car standing ~12 hours (over night).
Then measure the "open circuit voltage". Dont turn on the ignition! Just open the bonnet and measure the voltage. For the best measurements you should disconnect the cables from the battery to ensure there is absolutely no consumption from the car.
Measured voltage shows "state of charge".

100% - 12.65V
75% - 12.45V
50% - 12.24V
25% - 12.06V
0% - 11.89V

Your battery should keep at least 75% state of charge. If it is under that that is a sign that the battery is worn.
But those voltages are only valid at 20C. If it is colder outside, then you must substract 0.022V/C from your measured voltage.
So for instance, if there is 10C outside, and you measured 12.3V with your voltmeter you should substract 0.22V. So the corrected value is 12.08V. And that is lower than 50% state of charge... time to think about new battery.
another good way to check the battery is to attempt to start the engine and check the voltage during cranking. if the voltage collapses the battery is bad. below 9volts is bad
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16v , cold , difficult , glow , jtd , plugs , starting

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