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Old 27-06-2018   #1
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Thumbs up Cold start problem at first start

Hy guys from Romania!!!


I buy a few months ago a fiat 500 year 2008 , 1,4 engine,100HP,petrol.


When in warm outside the first start is ok.
When is cold outsite the first start do problems,start for 1-2 seconds and stop or start stammerer.


If i try to start the second time, it start ok.


I know little about mecanic and i clean the throttle body,and i search about IACV (idle air control valve) ho is responsible about idle start,but i dont fiind it to clean.
In a few days i''ll buy the spark plugs,are not a fortune.


Do u know what is the problem at cold start or where is the IACV if she have it ?
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Last edited by badboy20cm; 27-06-2018 at 10:00.
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Old 29-06-2018   #2
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Re: Cold start problem at first start

Hy ,nobody have this problem ?
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Old 29-06-2018   #3
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Re: Cold start problem at first start

Looks like a less common issue, I would not have thought it would be the idle control, more the cold start control, have someone with the correct software read the engine/codes and see what shows, the fact that it starts fine after the first struggle "might" be fuel enrichment when cold?
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Old 29-06-2018   #4
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Re: Cold start problem at first start

There used to be quite a few posts about poor starting when cold. Replacing the spark plugs usually fixes this - the factory fit OEM plugs are rubbish.

Better still, replace them with iridium plugs (NGK make a direct equivalent for the 1.4) and then you won't need to do them again for another 50000 miles. You'll get improved cold start performance, too.
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Last edited by jrkitching; 30-06-2018 at 09:14.
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Old 01-07-2018   #5
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Re: Cold start problem at first start

I change the plugs, today at 20 celcius, first start , 1 sec and die, at second time start ok.


I see at forum under the battery, a negative cable ho corrode,i loock at me and is not good condition .


If u have any ideea i am here.
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Old 03-07-2018   #6
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Quote Originally Posted by badboy20cm View Post
I change the plugs, today at 20 celcius, first start , 1 sec and die, at second time start ok.


I see at forum under the battery, a negative cable ho corrode,i loock at me and is not good condition .


If u have any ideea i am here.
Replace the earth strap, if you want to rule it out use a jump lead from the negative on the battery to the engine any suitable point and try starting. There's far too many things it could be to just keep suggesting and trying?
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Old 04-07-2018   #7
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Re: Cold start problem at first start

Hy, i clean that cable, was bad gorund at car body segment.


Now i whait to be cool to see what is happent!!! If it is ok for the moment at cool ,i will chage that gorund.
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Old 04-07-2018   #8
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Quote Originally Posted by badboy20cm View Post
Hy, i clean that cable, was bad gorund at car body segment.


Now i whait to be cool to see what is happent!!! If it is ok for the moment at cool ,i will chage that gorund.
It's only a few 's on Ebay 250mm long has the starting improved since cleaning?
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Old 04-07-2018   #9
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Re: Cold start problem at first start

I dont whant to buy at ebay,i am from Romania, but i will do my self (i post a picture tomorow).I have copper cable that resist hight amperage and crimping clamp.


Yes the starting is improve,i feel a diferente , but let the cool come.
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Old 06-07-2018   #10
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Re: Cold start problem at first start

the problem persist !!!




my question is who is controlling the idle rmp to this engine?
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Last edited by badboy20cm; 06-07-2018 at 07:10.
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Old 06-07-2018   #11
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Re: Cold start problem at first start

It's not an earth problem or a spark plug problem.

If it was, the car would not run fine the second or third time you started it... it would also not matter whether it was warm or cold.. the problem would not suddenly go away.

It can only be a cold-start issue and that means the mixture isn't being adjusted "rich" when you start the car. I don't know where the sensor is that tells the ECU the temperature but that would be the first thing to check.

The ECU might also be getting the correct information but not doing the right thing... although that's probably less likely than a duff or dirty sensor.




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Old 06-07-2018   #12
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Re: Cold start problem at first start

Another possibility is that you have a slightly leaking injector which is allowing fuel to seep into the cylinder when the engine is stopped for awhile (IIRC on the 1.4 FIRE, the fuel rail doesn't depressurise on shutdown). The excess fuel gives you an overrich mixture on initial start, often accompanied by initial smoking from the exhaust.
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Old 06-07-2018   #13
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Re: Cold start problem at first start

What happens if you put your foot on the accelerator/gas pedal then try starting for the first time and keep it at 1500 then release it?
Engine ecu controls all engine functions, try turn on ignition, WAIT a few seconds(put on seat belt) and only then crank/start engine
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Old 06-07-2018   #14
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Re: Cold start problem at first start

sorry guys , i am at work , when i come home i wiil read what u post.


In my lounch break, i do a deep search at google, and i find the idle air control how is loock.


When i go home try to clean that if is posibible.
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Old 08-07-2018   #15
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Re: Cold start problem at first start

Quote Originally Posted by John202020 View Post
What happens if you put your foot on the accelerator/gas pedal then try starting for the first time and keep it at 1500 then release it?
Engine ecu controls all engine functions, try turn on ignition, WAIT a few seconds(put on seat belt) and only then crank/start engine





I try to put, but die at first 1-2 sec when start.
I unplug the item what i sow, butt the engine not die, that mean is not a idle air control.


I put a tester, and dont show DTC erors.
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Last edited by badboy20cm; 08-07-2018 at 11:18.
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