After a few weeks I've finally found what the problem was with my 500L. I had exactly the same issue. I've tried to clean the MAP, relearn the throttle, reset parameters and everything else what could be found on net. It is not coincidence that most of the cars with this symptoms are running on LPG.

I have excluded LPG as reason since I was testing running only on petrol. But do you running on petrol when LED says that? No. There is still pressure in LPG system and there is gas in a pipes. I was thinking that small leak on gas injector during the night could cause such issue. I've decided to close LPG valve on the tank, also, to remove LPG fuse and :slayer: car started to work as expected. No mater is it cold or not, how long from last run etc.

I am not sure what was exact reason in my case since I have changed LPG injectors and LPG MAP sensor just in case. But it was small gas leak which does not make any difference during the driving on LPG but makes this issue if car stays off for a more than 8-10 hours. It doesn't mater that you have valve on LPG vaporizer there is enough gas in pipes so if injector leaks :bang:

Hope it helps.

ddjuric said:

I am not sure what was exact reason in my case since I have changed LPG injectors and LPG MAP sensor just in case. But it was small gas leak which does not make any difference during the driving on LPG but makes this issue if car stays off for a more than 8-10 hours. It doesn't mater that you have valve on LPG vaporizer there is enough gas in pipes so if injector leaks :bang:

Hope it helps.

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I don't know if i mentioned this, but his one of the first things i checked, i simply removed the hose that gets LPG to the LPG fuel rail, plugged the hose.
So no gas could get in the engine.
2 days later still no difference.

I don't know if i mentioned this, but his one of the first things i checked, i simply removed the hose that gets LPG to the LPG fuel rail, plugged the hose.
So no gas could get in the engine.
2 days later still no difference.

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Actually it could through LPG MAP sensor hose. I would recommend you to remove the LPG fuse and to close LPG valve on the tank if you want to be 100% sure. Or at least try to remove MAP sensor hose that is connected to the intake.

Hi friends! I have mostly the same problem - hard cold start.

Cold engine starts on 2-3 attempt, and exactly after started - ignition fails("triples"), shaking and smokes from exhaust (petrol smelling)... after 20-40 sec - ALL fine...
When I start engine again (slightly warmed) - it start work from first attemp and works fine like a clock...

I changed spark plugs to original FTP-NGK, bought fuel at another gas station, also rided some time on petrol whith closed LPG valve in LPG-off mode... but nothing helps(


(I even disconnected the battery, as in the video, before the first start in the morning):
https://www.youtube.com/watch?v=xevgWqrLjy0

...maybe someone solved this problem?

I am still running on petrol only on my T-jet with services up to date with the right plugs etc. I have only noticed this winter that when temperature is below 4℃, it dies on the 1st attempt, starts idling as if it wants to die on the second attempt and then you tap the accelerator then its fine. There are no issues with perfomance and when its warm it just kicks to life with ease. The vehicle is 9 years old now and has 270k on the clock.
So it would be quite interesting if the true answer is found.

Ive got an advice once here on forum that helped.

Use all petrol from tank, way behind display message for 0k /miles left for driving.
Then pour fresh petrol, recomended 100 octanes for atleast half tank.
Then you will see is there difference on cold start.

1.4 90 hp LPG owner here, similar issue. During cold starts (20-30 degrees in my country now), the engine misfires and stalls for roughly 1 or 2 minutes. Once it warms up a little the misfires stop and it starts right up. This is also accompanied with a little high petrol consumption i think (10 starts use around 6-7 litres of petrol roughly estimated). No error codes.

bsks said:

1.4 90 hp LPG owner here, similar issue. During cold starts (20-30 degrees in my country now), the engine misfires and stalls for roughly 1 or 2 minutes. Once it warms up a little the misfires stop and it starts right up. This is also accompanied with a little high petrol consumption i think (10 starts use around 6-7 litres of petrol roughly estimated). No error codes.

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Hi

Is this LPG .. OR FUEL(petrol 95+RON)

IF it happens in 20'c.. but clears after the vehicles water and oil have warmed

I would suspect a sensor

Lambda probe.. coolant temperature..

It starts in petrol when cold. Today it didnt even start, just starts for a fraction of a second and stalls right away. Car started behaving very weird when running on petrol. When i press the accelerator it bogs down for a second, then starts accelerating slowly, just like a turbo car with huge turbo lag. This happens only on petrol, on LPG there are no problems, once it starts ofcourse

hi again! Problem solved! 2 steps:
1) check your lambda (1st wich before catalyst (my t-jet has BOSCH 0 258 006 206)
my showed always 0.4v (in normal shold always changing 0.1-0.9)
2) check your LPG ECU settings - curves of lpg and gasoline on the graph should coincide 1: 1, a small deviation that will be allowed on other cars - does not work on t-jet engine! (and at morning on cold start we have re-enriched gasoline mixture)

who will try my method please write your result here.

bsks

Had someone this issue on non-LPG car? I have problems starting my car in spring and autumn in the morning. After start it runs smooth and have no problems. Battery, sparks and MAP sensor are new. Any idea?

Cizekan said:

Had someone this issue on non-LPG car? I have problems starting my car in spring and autumn in the morning. After start it runs smooth and have no problems. Battery, sparks and MAP sensor are new. Any idea?

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fiat has been released a new version of firmware for ECU, which solved this problem

With colder weather I have cold start problem again.But at this time issue is not with LPG. I turn off LPG, closed LPG valve and reset self-adaptation parameters - and nothing changes. Engine starts very bad.
At this time I closed evaporation valve hose, also checked all temperatures from ECU - all OK (and 0 errors). But engine starts from 2-3-4 attempts...(

manhunt said:

With colder weather I have cold start problem again.But at this time issue is not with LPG. I turn off LPG, closed LPG valve and reset self-adaptation parameters - and nothing changes. Engine starts very bad.
At this time I closed evaporation valve hose, also checked all temperatures from ECU - all OK (and 0 errors). But engine starts from 2-3-4 attempts...(

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You seem to have gone through this wisely

But I will ask..

Got a spark..and fuel tank priming pump working on the 1st attempt of the day?

Also.. if it starts by attempt 5:

Turn it back off.. will it restart instantly.. or take another 4?


These will help general diagnosis..

People seem to hint at fuel quality being crucial.. need FRESH higher octane fuel


I would be interested to see what you have experienced

Charlie

varesecrazy said:

Got a spark..and fuel tank priming pump working on the 1st attempt of the day?

Also.. if it starts by attempt 5:

Turn it back off.. will it restart instantly.. or take another 4?

People seem to hint at fuel quality being crucial.. need FRESH higher octane fuel
Charlie

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1) When engine works 3 min after first cold start - it ALWAYS starts from 1ts attempt. When engine hot or slightly warm - ALWAYS starts from 1ts attempt

2) If it starts by attempt 5 and I off instantly and restart instantly - it takes 3-4-5 attempts again.

3) I added some fresh fuel many times and almost nothing changes... yes - some times I needed 2 attempts, sometimes 7, but in most cases - 4-5 att. ...

Do you have feedback of temperature ?

oil
Coolant
Air to motor (maf)... compare to mirror sensor

Compare these figures COLD. warm and HOT

I have a fuelling problem on a twinair that seems Temperaure related..
So have made some comparisons

varesecrazy said:

Do you have feedback of temperature ?
oil
Coolant
Air to motor (maf)... compare to mirror sensor
Compare these figures COLD. warm and HOT
I have a fuelling problem on a twinair that seems Temperaure related..
So have made some comparisons

Click to expand...

Sorry, maybe I can't understand fully what do you mean...
I have morning weather temp +8C.
At ECU I see the same:
engine temp +8C,
air temp +8.5C,
(preasure 990 mBar)

When engine starts (from 4 attempts) and working - this temperatures slowly grows up. And after some time we have 89C engine and +20C air (for example) That's all...

P.S. In fuel corrections (adaptation banks) I have: long-term correction +2.5, short +3.5. (If it will have intake air leak... long-term correction will be about +10 or more)

I noticed on my car that it could be outside temperature related. I think that bad crank reshold is cca 7-8 degree celsius.
Also starts better when fuel tank is over 1/2

MikeG20 said:

I noticed on my car that it could be outside temperature related. I think that bad crank reshold is cca 7-8 degree celsius.
Also starts better when fuel tank is over 1/2

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Don't you find these problems stupid and ridiculous? It is lottery or somethin? Engine will start/not start?...
At least though one of the other car brands - have some similar ****?
And so, if nobody can't do anything with this stupid problems, conclusion: this car - a piece of ****? Or I don't understand something?