omega diesel starting problem

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Mon 19 Aug 2002 10:44
omega diesel starting problem - chris taylor
Does anyone have any ideas as to what can cause starting problems on my omega 2.5 TD. The diesel specialist has had it for a while and tells me that there is no diesel getting to the injectors. He says he thinks it is an airlock caused by poor joints in the pipes. He's replaced all the pipe connectors from the pump to the injectors and also replaced a pipe at the back from the pump. It still doesn't start very well especially in a morning, I have to crank it over 10 or so times before it fires from cold (3 or 4 when hot). The glow plug light lights up for about 5 or so seconds when the ignition is turned on so they seem to be OK. Anyone any ideas?
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Mon 19 Aug 2002 12:02
omega diesel starting problem - svpworld
Fuel pump? Fuel Filter? Dont know anything about diesel but if theres no fuel getting to the injectors, I'd assume it something other than the pipes in the fuel line.

S.


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www.svpworld.com
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Mon 19 Aug 2002 18:17
omega diesel starting problem - Dizzy {P}
The diesel specialist OUGHT to be able to diagnose the fault better than anyone on this forum since he has the car and should know what to look for.

Has he checked that the fuel filter has been put together properly? If the seals have not been put back in the right place they can stop the fuel flow.

If it is found that there is fuel now getting to the injectors but it still won't start properly, I would look at the glow plugs before anything else. The light coming on doesn't necessarily mean that they are working. I would have them checked, as well as the electrical connections to them and the relay that controls them.

Finally, did this fault just appear, or did it follow some work or adjustments to the engine? When I am stuck with a fault that I can't diagnose, I always think back to what was the last thing to be touched and it is surprising how often this is the culprit.
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Mon 19 Aug 2002 18:57
omega diesel starting problem - Andrew Hamilton
On my Perkins I have a liitle manual lever on the mechanical pump which I waggle to force diesel into filter after bleeding off any water. Wonder if you have similar as this would show up air in feed pipe.
I think the problem is the solenoid valve that cuts off diesel to stop engine. Suggest intially you check all connectors in engine bay for corrosion and clean them. Then check out function of soleniod valve.
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Mon 19 Aug 2002 21:24
omega diesel starting problem - Richard J
Assuming that the engine runs ok once started and that it is easier to start when hot suggests the glow plugs aren't working as they should.

They are easy to check with a meter; the resistance (ohms) should be in the manual. If open cicuit; they are burnt out. You do not need to replace the whole set; just the duff ones. I would buy genuine GM replacements; although expensive they are far better than aftermarket cheapos.

Also check the timer is working by connecting a voltmeter to the plug feed wire and earth and switching on the ignition. Time how long there is a current in the cicuit and compare to the spec. in the manual.

Your specialist should have carried out these basic checks. Why not ask him first ?
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