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Td115 1.8 Tdci Issue

glowplug wiring loom td115 1.8tdci

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#1 dazj

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Posted 23 August 2013 - 01:55 AM

Hi All,

 

I recently noticed my car under performing. I have a 2009 1.8TDCi Focus Zetec.

 

Upon checking the engine bay I noticed a badly burnt wire and connector.

The car runs as it should when cold, when it gets up to temperature it stutters and large loss of power after 2200rpm. Also a larger than normal cloud of smoke puffs out of the exhaust when it is stuttering.

 

When it is warm the car starts ok and drives fine under 2200rpm.

Another point when the car starts stuttering I can hear what sounds like a boost leak (whoosh).

I have checked all boost pipes and these are all ok, I checked for fault codes and a "Low Fuel Pressure Fault" was showing. Also I have noticed an increase in fuel consumption although the MFD displays normal MPG.

 

I know I'm going to have to replace the glow plug loom but would this resolve the stuttering issue.

 

Any help will be greatly appreciated.

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#2 FOCA

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Posted 23 August 2013 - 03:21 AM

Generally, the glow plugs are just for starting (on older designs of diesels, anyway)

 

But on more recent designs the glow plugs come on when the car is running (aparently)

 

One possibility is -

 

As the engine can produce a fair bit of smoke on startup if all the glowplugs are not working, it can produce pollution, so the ECU detects this and can put the car into a kind of "limp mode" - ironically if its just the glow plugs that are faulty the engine would otherwise run fine once warmed up (its a "emissions" thing - so you don't keep running the car)

 

The glow plugs fault should have shown up in the fault codes though   

 

Sort the glow plugs/ glow plugs control module/ wiring 1st and see if that fixes it



#3 STEADS

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Posted 23 August 2013 - 11:12 AM

Looking in the Haynes manual that is the fuel temp temp sensor so I should imagine change that and sort why the wires melted and it should cure your problem

#4 martyntdci

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Posted 23 August 2013 - 04:28 PM

in a word no it wont, your stuttering issue is with another fault.... the loom will cost 14 quid approx from ford, i replace mine 2 weeks ago, as it was melted just like yours..... but i ran the car for a couple of months with no live feed connected so they were not working....



#5 phil23

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Posted 07 March 2014 - 08:19 PM

Hello everyone I have a Ford focus 1.8 tdci 2008 mk3 and I noticed the glow plug wire has been melting as their is a constant live feed around 14 volts going through it now I've been told their should be, but just for a few seconds until the glow plugs are hot enough to heat the diesel and then after that their should be no more volts. Could anyone help or give me some idea what it could be please??

#6 martyntdci

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Posted 07 March 2014 - 08:30 PM

if the loom has burnt/melted away just like mine did then replace it.... ive never tested the voltage, never needed to....

 

Glow plugs will turn on when a temperature sensor tells the glow plug
control circuit that the engine is cold. The glow plugs will turn on
untill they heat up to the right temperature. Normally this is measured
by the resistance and consequently the amount of current that passes
through the glow plugs. As the glow plugs heat up they resist the
current slowing it down to fewer amps then before. When the glow plug
circuit senses that the glow plugs have reached this low current
threshhold, which indicates that they are hot enough, the circuit turns
off and the driver starts the engine.



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