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pdiamond1941@gmail.com 11-02-2013 05:03 AM

WG 2.7crd 2002 gloplug timing,hard start
 
Cranking time to start increase with temp drop. Glow plug indicator only stays on for 3 secs instead of the manual times of +10C - wait to lamp on - 6 secs and preheat cycle (lamp on) - 21secs. Where are these timings set ? ECM and can they be altered or are they reduced in my case due to faulty part or wiring etc?

Mechanic wants to go the fuel pipe chase first.

Thanks any input

pd

Frango100 11-02-2013 10:12 AM

Re: WG 2.7crd 2002 gloplug timing,hard start
 
1 Attachment(s)
Yes, the ECM calculates the glow times depending on the coolant temperature input. See attached a table of the glow times depending on the coolant temperatures. Seems to be a coolant sensor (circuit) problem.

pdiamond1941@gmail.com 11-02-2013 01:07 PM

Re: WG 2.7crd 2002 gloplug timing,hard start
 
Thanks Frank,
Does the coolant temp input use the same sensor as the temp. gauge. Mine is reading correctly. If not is there another sensor. Can the timings be changed in the ECM by a diagnostics guy.

I am dubious about a fuel lift problem. When temp is above 15C (ambient) engine starts instantly. At 10C, 25 secs of cranking is necessary. I did notice the short 3 sec glow time which seems inadequate compared to the manual glow lamp times. The engine starts instantly all day after first start - so glow plugs time or fuel lift ?
Many thanks
PDIAMOND

Frango100 11-03-2013 10:42 AM

Re: WG 2.7crd 2002 gloplug timing,hard start
 
Donīt know the crd very well, but from my understanding there is only one coolant temp sensor.
Eventhough the temperature indication is ok at operating temperature, you donīt know this for when its cold. The indicator starts with 40 °C when iīm not wrong.
I will see if i can find any resistance values for this sensor, so that you can check that. I doubt if there is any possibility of flashing the ECM with other glow times.

Frango100 11-03-2013 11:07 AM

Re: WG 2.7crd 2002 gloplug timing,hard start
 
1 Attachment(s)
I found a resistance chart for the petrol engine coolant sensor (and inlet temp sensor) and i believe it should be the same for the crd. Also check the inlet temperature sensor at this ocassion, because that one is also used for the glow timing.


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