Poor starting

Technical questions and answers about the Mazda Bongo

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phatgit

Poor starting

Post by phatgit » Wed Jun 30, 2010 10:22 pm

difficult to start first thing,ok the rest of the day new glo plugs fitted at last service, so I suspect the relay or a blown fuse, Question is where is the relay and where is the relevant fuse located. any help most welcome
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wormey
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Re: Poor starting

Post by wormey » Wed Jun 30, 2010 10:42 pm

You could still have had a dodgey glo plug fitted from new. You can test them all to check there status.

:D
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missfixit70
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Re: Poor starting

Post by missfixit70 » Wed Jun 30, 2010 10:50 pm

Relay inside drivers wing behind the battery, fusible link on th wire from the battery. Check the connections are all tight & glow plug rail isn't shorting anywhere, especially if shorter plugs've been fitted where ther were longer ones. Were the new plugs decent onesieNGK, or were they cheap & cheerful(or not)? Check there's 12 v getting to the rail & that the battery has enough beans to turn the starter as well as power the glow plugs. Worth waiting 5 seconds after the glow plug light has gone out before turning it over to see if it makes a difference?
This may help - http://www.igmaynard.co.uk/bongo/forum/ ... ng#p425863
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Tripewriter

Re: Poor starting

Post by Tripewriter » Thu Jul 01, 2010 6:36 am

Why blame the glo plugs? It is possible that fuel is not present which would mean air weeping into the system somewhere. Have a look at the flexible fuel return pipe which is between no 2 injector and the fuel pump, particularly if you have an older Bongo.
Tripewriter

Re: Poor starting

Post by Tripewriter » Thu Jul 01, 2010 6:39 am

Tripewriter wrote:Why blame the glo plugs? It is possible that fuel is not present which would mean air weeping into the system somewhere. Have a look at the flexible fuel return pipe which is between no 2 injector and the fuel pump, particularly if you have an older Bongo.
Additional. Does the Glow plug light on the dash come on? Can you hear the relay dropping in and out? As its OK after the first start I would suspect fuel starvation, is there any smoke if so what colour?
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haydn callow
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Re: Poor starting

Post by haydn callow » Thu Jul 01, 2010 12:02 pm

Additional. Does the Glow plug light on the dash come on? Can you hear the relay dropping in and out? As its OK after the first start I would suspect fuel starvation, is there any smoke if so what colour?
The glowplug "light" on the dash has nothing to do with the glow plug circuit...it is simply a bulb/timer and if it didn't come on at all "blown bulb" the plugs would be unaffected.
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phatgit

Re: Poor starting

Post by phatgit » Thu Jul 01, 2010 8:23 pm

Murphy's law arrived today, it started first time. anyway the plug light comes on ok, no smoke of any kind, spoke to the mechanic who serviced it, told him the problem,he seems to think its the fuel draining back, as in this weather,it should start without glo plugs. What's anyone else think?
Tripewriter

Re: Poor starting

Post by Tripewriter » Thu Jul 01, 2010 9:13 pm

haydn callow wrote:Additional. Does the Glow plug light on the dash come on? Can you hear the relay dropping in and out? As its OK after the first start I would suspect fuel starvation, is there any smoke if so what colour?

The glowplug "light" on the dash has nothing to do with the glow plug circuit...it is simply a bulb/timer and if it didn't come on at all "blown bulb" the plugs would be unaffected.

Why bother fitting it then? =D>
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haydn callow
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Re: Poor starting

Post by haydn callow » Thu Jul 01, 2010 9:29 pm

To remind you to wait before starting....... #-o #-o
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haydn callow
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Re: Poor starting

Post by haydn callow » Thu Jul 01, 2010 9:36 pm

You may or may not know that on a Bongo the glow plugs do not go out when the "dash light" goes out....as they are in no way interconnected......in fact..the glow plugs stay on untill a certain amount of revs are acheived and a certain temp reached....this can result in the glow plugs switching on/off/on/off several times before finally going off permanantly....this is one reason the plugs seem to need regular replacement and are short lived.....you can tap into one of the relay input wires and fit a illuminated switch to manually overide this and you will see the switch light come on/off/on/off as the plugs cycle (factsheet in members area)
http://www.coolantalarm.co.uk
Developer of the Mazda Bongo Coolant loss Alarm
Also BMW Clocks
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