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vs ecotec hard to start engine cold

baza

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g`day guys i need some help , my wifes vs is hard to start when the engine is cold. starts fine when engine has warmed up. have done a fault code check, full cycle of code 12, engine runs good when started . battery is fine 1 year old , alternator puts out 14.2 volts engine running , new leads and spark plugs 6 months ago. have cleaned throttlebody and airflow meter, last year CAS was replaced. last week i removed coils and checked resistance with multimeter, readings within specs . could it be clogged fuel filter?. will be gratefull for any ideas , thanks
 

FstStig

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Very well could be just a clogged Fuel filter, cheap and easy as to replace and if it hasn't been changed for a while then that would be the first thing I would be changing. If its still doing that i would be looking at maybe your Starter Motor is on its way out, The prongs that the solenoid slides along could be getting worn making it hard to create a spark. If your going to change it, make sure you depressurize your fuel lines first.
 

baza

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Very well could be just a clogged Fuel filter, cheap and easy as to replace and if it hasn't been changed for a while then that would be the first thing I would be changing. If its still doing that i would be looking at maybe your Starter Motor is on its way out, The prongs that the solenoid slides along could be getting worn making it hard to create a spark. If your going to change it, make sure you depressurize your fuel lines first.
thanks Mumboman i think starter motor is ok , engine cranks good , just takes long time to fire up when cold. i will change fuel filter , thanks again for your reply.
 

FstStig

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No worries mate, if you need a hand with anything let me know, I'm basically on the Central Coast as well. What part of the Central Coast are you on?
 

baza

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No worries mate, if you need a hand with anything let me know, I'm basically on the Central Coast as well. What part of the Central Coast are you on?
i am down at gorokan Mumboman , very kind of you to offer help.
 

FstStig

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Awesome man, like I said man ever need a hand I'm only 15mins away. Let us know how the Fuel Filter goes.
 

Bizmark

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Injectors themselves could also be to blame. Though they aren't cheap to have a workshop check them out. Could be worth looking at if the fuel filter change doesn't bring any improvements.
 

STL17

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my vs v6 in my vn done the same thing it ended up being the tps
 

baza

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thanks people for your replies , i will replace fuel filter and see if that helps . if that doesnt fix it will try TPS and coolant temp sensor.
 

pomiedore vs

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I have the exact same problem.
It isn't the coolant temp sender or the fuel filter. Trust me.
Possibly injectors?
Try the TPS and let us know how you go.
 
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