If you own t-jet and find this problems anoying, sell the car.
Simple as that.

Engine always starts. In my case, on second crank-not too anoying-on cold or tank below 1/2.

I like challenge, till now i didnt repair/change anything.
But i plan to.

MikeG20 said:

If you own t-jet and find this problems anoying,

Click to expand...

when car starts from 3-5 attempts - it is not annoying?

MikeG20 said:

sell the car.
Simple as that.

Click to expand...

not so simple, because nobody needs car which does not wants to start
well, except for spare parts and sell them separatly

P.S. and how to solve the problem in terms of interest / hobby?)

Now when is colder (-4 to +2 degree Celsius), i have no cold start issues.
I connected car to MES, got message for invalid signal from oxygen sensor (lambda) above catalysator (P 0130). So waiting for sensor to come
I could be connected to P1172 that is also detected

I emptied fuel tank and put 100 octane fuel, after that engine started from 1st attempt... will see... stupid car

manhunt said:

I emptied fuel tank and put 100 octane fuel, after that engine started from 1st attempt... will see... stupid car

Click to expand...

So exactly what i said multiple times... starts well with good new /fresh fuel.

It's a fueling issue.... but from my many years dealing with the issue, it looks more like a programing issue that a hardware issue.


probably done for better emissions...or maybe to protect the catalytic converter.


I've replaced multiple sensors, pump, regulator, gaskets etc etc ... even the engine.

Only thing that makes it start is adding a bit more fuel at cold start.... that is why it starts after a few attempts, there will be enough fuel in the intake.


The whole issue is massively exaggerated on cars with LPG because the fuel stays 5-10 times longer in the tank, as opposed to the cars running 100% on petrol.

aurick86 said:

So exactly what i said multiple times... starts well with good new /fresh fuel.
It's a fueling issue.... but from my many years dealing with the issue, it looks more like a programing issue that a hardware issue.

Click to expand...

I added new fuel (20l) when in tank was 5 -7 liters only, but it is not enough! As I know now.
You should pumped of ALL old fuel completely to 0.0 liters. Then refuel new, but not just 95 regular octane (especially not "ECO" fuel with alcohol), and only 98-100 or 95 super quality.
P.S. ECO fuel - decomposes (over time) into water with alcohol. And every morning your fuel pump deliver water in to injectors (from the tank bottom) :yuck:

aurick86 said:

or maybe to protect the catalytic converter.

Click to expand...

ooooh yes! when you trying to start stupid car from 5 attempts - it is SO "protective" for the catalytic!

aurick86 said:

it looks more like a programing issue that a hardware issue.

Click to expand...

I heard that fiat in 2010 made new firmware for cars 2007-2010 years... But I did not learned this topic yeat

aurick86 said:

etc etc ... even the engine.

Click to expand...

crazy things... I replaced only some sensors and fuel filter.

aurick86 said:

The whole issue is massively exaggerated on cars with LPG because the fuel stays 5-10 times longer in the tank, as opposed to the cars running 100% on petrol.

Click to expand...

it is clear, on LPG change of fuel occurs once in 4-6 months a maximum,
BUT other normal cars (I had Volvo 2.0T for example) starts very well on THE SAME fuel...

I know, I have been dealing with the issue for many years.


But on the other hand my t-jet 120 ...is now making ~230 hp...so it has that going for it.

also the t-jet does have slightly lower compression ratio then newer ...aspirated/turbo cars...so that could play a part in it... not necessarily a massive part, but it all adds up

aurick86 said:

I know, I have been dealing with the issue for many years.

Click to expand...

so you have new version of ECU firmware, where cold-start algorithm fixed?

manhunt said:

so you have new version of ECU firmware, where cold-start algorithm fixed?

Click to expand...

yes, i should... had in at Fiat a couple of times, different locations, they checked for updates for my car... all was up-to-date.


Also since then i've remapped it two times (different base files)... problem was still present all times

aurick86 said:

yes, i should... had in at Fiat a couple of times, different locations, they checked for updates for my car... all was up-to-date.
Also since then i've remapped it two times (different base files)... problem was still present all times

Click to expand...

so, after time I still have cold start issue, but only when fuel on the tank older then 2-3 weeks... when fuel is fresh - starts well every day on cold..
it is really strange car.

manhunt said:

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

Click to expand...

did u have this version of the ecu? Thanks.. I searched everywhere and its dont have this version.