StiloCZ said:

Thanks for the suggestion, I will try some 98 octane fuel tomorrow, maybe the issue is the "biosložka" in the 95 octane fuel in CZ

Click to expand...

We also tried Eurooil gas without ethanol and this was the first time we saw this problem. But only cheap 98 worked, fancy 100 didn't

badboy20cm said:

follow!


U say if u have half or more fuel tank start ok ? did u check the purge valve or vapor trap

Click to expand...

Hi!

Did you find a solution for your problem?
I have the same problem with a 2013 Fiat 500c 1.4L (MultiAir).
Car starts and stalls after 2-3 seconds but only in the mornings, regardless of the weather. Sometimes it'll misfire, it takes 2-3 attempts to turn on, and after it turns on it works great for the rest of the day.

I haven't tried much since I wanted to find the root of the problem before continuing, but this is what I've done:
- Changed spark plugs (NGK copper to NGK copper)
- Used a fuel inyector cleaner
Problem persists.

Something I'd like to note is, this problem started happening after an oil and filter change at the dealership.

Is your car losing coolant? Head gasket issues on the 1.4 are not unknown, and a mode of failure I've seen more than once is between a coolant passage and a cylinder. Excessive steaming and/or pressurising of the header tank would be other pointers. I wonder if coolant finds its way (in small quantities) into one or more cylinders in the case of a slight head gasket leak, meaning a damp start first thing...

Just a thought, from having run a few of these engines.

Nick

puntodeltathema said:

Is your car losing coolant? Head gasket issues on the 1.4 are not unknown, and a mode of failure I've seen more than once is between a coolant passage and a cylinder. Excessive steaming and/or pressurising of the header tank would be other pointers. I wonder if coolant finds its way (in small quantities) into one or more cylinders in the case of a slight head gasket leak, meaning a damp start first thing...

Just a thought, from having run a few of these engines.

Nick

Click to expand...

Thank you for your response Nick,

I don't think so (thankfully), my coolant levels are good, my oil looks clean, no steaming nor pressure on the tank either.

hai1strik3 said:

Hi!

Did you find a solution for your problem?
I have the same problem with a 2013 Fiat 500c 1.4L (MultiAir).
Car starts and stalls after 2-3 seconds but only in the mornings, regardless of the weather. Sometimes it'll misfire, it takes 2-3 attempts to turn on, and after it turns on it works great for the rest of the day.

I haven't tried much since I wanted to find the root of the problem before continuing, but this is what I've done:
- Changed spark plugs (NGK copper to NGK copper)
- Used a fuel inyector cleaner
Problem persists.

Something I'd like to note is, this problem started happening after an oil and filter change at the dealership.

Click to expand...

Some updates:
- Thoroughly cleaned the throttle body
- Properly cleaned the fuel injectors
Problem persists.

Since the problem started after an oil change, I've grown suspicious as to maybe the oil was somehow contaminated and it's causing a problem with the MultiAir valve filter/actuator or even the unit. So, my next steps are:
- Change the oil again, I'm planning on using full synthetic Mobil 1 oil, compared to the synthetic-blend the dealership used.
- Change the oil filter
- Clean the MultiAir valve filter/actuator
- Recondition the belt (taking advantage of the fact that I'm there already)

hai1strik3 said:

Some updates:
- Thoroughly cleaned the throttle body
- Properly cleaned the fuel injectors
Problem persists.

Since the problem started after an oil change, I've grown suspicious as to maybe the oil was somehow contaminated and it's causing a problem with the MultiAir valve filter/actuator or even the unit. So, my next steps are:
- Change the oil again, I'm planning on using full synthetic Mobil 1 oil, compared to the synthetic-blend the dealership used.
- Change the oil filter
- Clean the MultiAir valve filter/actuator
- Recondition the belt (taking advantage of the fact that I'm there already)

Click to expand...

Final update:
Before doing all that I decided to reset the ECU and use the car in sport mode, 80 mph for an hour. It has been a week now and the problem has disappeared.
I'll update if it ever happens again.

Update: we hope that this will last this time but, 500 is starting on regular gas again!

First of all, coil pack on cyl.3 died, changed, nothing. In a week Lambda 2 died, changed. Lambda only triggered some check engine light, no difference in power, consuption... I also push valve from rail (or how to call it, on top of the intake valves) and I tried to push it a few times to spray some fuel (heard about it somewhere), but after that - problem is gone. Not shure if lambda 2 (heated behind the catalytic converter) helped, can`t explain how this could be connected...

Will see, if this will last, fingers crossed

Bleeding the fuel rail? Interesting. Good luck - hope it's fixed it!

Heya everyone,

I FOUND THE PROBLEM ! (you are going to hate me and love me)

So like many ; my 2007 1.4 failed to cold start the first time.

I did my academic researches and here is the result :

- Head Gasquet is kinda faulty. Improper alignment inbetween Cylynderhead and engine Block

BUT don't cry it is not what you think.

What happens is when cold the cylinder Head and Engine block is not properly aligned we are talking about a micro gap.

SO ; While you car is cold a few (a tiny bit) of coolant is going into the cylinder. That is why it missfires.

This is why you don't lose coolant because as soon as the engine warms up the gap gets close by the material expansion.

So you have a white smoke when you starts in winter that vanish when your engine heat up.

Like many i have the same symptoms.

You can go 2 ways:

-Change the gasquet and rework the level of the block by flatening and polishing block + HeadGasquet

OR

- Use a Gasquet repair Liquid such as Bluedevil.

You can go both ways but the second way is totally appropriate. Because your Headgasket is still good. But if you wait it will degrade.
Changing the Headgasquet is much more expensive. If you do it you will see that i am not lying. One cylinder would be clean as it left the factory because it gets steamed with the coolant during cold start.

So STOP trying to change parts and trust me.

When you use a product such as Bleudevil I strongly Advise you change the oil to avoid any countamination.

SOURCES:
-Myself
- Chrisfix on youtube
- Italian forums i spent hours on it doing research

To conclude:

Your 500 is still good don't panic what you are experiencing is a slight misalignment from factory. It can be tolerated but i advise you use a gasquet repair product before your gasquet starts to fail.


Captain away

Obamo said:

Heya everyone,

I FOUND THE PROBLEM ! (you are going to hate me and love me)

So like many ; my 2007 1.4 failed to cold start the first time.

I did my academic researches and here is the result :

- Head Gasquet is kinda faulty. Improper alignment inbetween Cylynderhead and engine Block

BUT don't cry it is not what you think.

What happens is when cold the cylinder Head and Engine block is not properly aligned we are talking about a micro gap.

SO ; While you car is cold a few (a tiny bit) of coolant is going into the cylinder. That is why it missfires.

This is why you don't lose coolant because as soon as the engine warms up the gap gets close by the material expansion.

So you have a white smoke when you starts in winter that vanish when your engine heat up.

Like many i have the same symptoms.

You can go 2 ways:

-Change the gasquet and rework the level of the block by flatening and polishing block + HeadGasquet

OR

- Use a Gasquet repair Liquid such as Bluedevil.

You can go both ways but the second way is totally appropriate. Because your Headgasket is still good. But if you wait it will degrade.
Changing the Headgasquet is much more expensive. If you do it you will see that i am not lying. One cylinder would be clean as it left the factory because it gets steamed with the coolant during cold start.

So STOP trying to change parts and trust me.

When you use a product such as Bleudevil I strongly Advise you change the oil to avoid any countamination.

SOURCES:
-Myself
- Chrisfix on youtube
- Italian forums i spent hours on it doing research

To conclude:

Your 500 is still good don't panic what you are experiencing is a slight misalignment from factory. It can be tolerated but i advise you use a gasquet repair product before your gasquet starts to fail.


Captain away

Click to expand...

Hi!

thanks for detailed info. Everything makes sense, I also thought about some "seal gasket" issue, but question is, why does car starts on 98 octane? Now after new ignition coils car starts fine even with regular gas. This may be related to head gasket leak, because new coil can give better spark?

Anyway I will try this head gasket sealer

Obamo said:

Heya everyone,

I FOUND THE PROBLEM ! (you are going to hate me and love me)

So like many ; my 2007 1.4 failed to cold start the first time.

I did my academic researches and here is the result :

- Head Gasquet is kinda faulty. Improper alignment inbetween Cylynderhead and engine Block

Click to expand...

I have bravo tget 150 hp with cold start issue. This march I've notice a small coolant loss from the tank but without clues from where it leaks. Few months later is ok, no leaks anymore. Is this a sign that head gasket goes faulty?

nevarulan said:

Pot has 3 pins. cut the connnection and Connect one pin to ECU Side of pin2. And Connect middle pint to ground. Voltage will change by the pot

Click to expand...

A few questions to this - need to cut the temperature wire that came from the ECU to the map sensor connector, right?(marked with 1 on the pic)
Then connect to the middle pin of the potentiometer, right?
And the rest of the wire connect to ground pin of the potentiometer?(marked with 3 on the pic)