Technical duralogic problem 500 lounge 0.9T 2014

[cabmerlot]

hi guys and dolls
hope im in the correct section

i recently bought a 2014 fiat 500 lounge (0.9 turbo twin air)with a couple of problems
first it gets no gears....it will click over to auto and the hydraulics prime when the door is opened
second the engine is giving a really loud screech when running.......it sounds like a bearing somewhere....when i rev the engine it will hold screech and then will stop after it reaches revs

so i was thinking serpentine belt/pulleys

so to access the belt i pulled the charge air pipe off(from the top) and found a pinched O ring into the throttle body

the serpentine belt looks due for replacement but the functions and idler bearings all looked fine...one idler roller did have some rubber build up on it tho

also checked the hyd oil and found it was on the mark

after that i found it easier to access belt from below

there are no codes(that i can see)

multiECU scan dont post to australia

tomorrow i will refit the top pipes with repaired O ring then run engine with the serpentine belt OFF
then fit up belt and run again(using old belt while awaiting new belt)

i dont know the history of the faults as orig owner was Chinese and not much good with English but he said a mechanic told him it needs a complete new gearbox

heres what i am hoping.....the screeching was caused by compressed air from the turbo leaking out from trapped O ring......the ecu dosent like low air pressure so has decided to put the car into (no-go mode)....

will find out more tomorrow

russ

 

[cabmerlot]

well the screeching wasnt caused by o'ring or serpentine belt so i now suspect clutch or gearbox...have ordered a new clutch but am a little busy atm to be pulling the box....also have just ordered multiscan so cant do much til that arrives

russ

 

[rmjbn1]

Hi Russ, sorry you've not had responses yet.

You might be in the wrong section, I understand your car is a 500C? You might be better off here: https://www.fiatforum.com/forums/500-2007.148/

There's a dedicated thread to DuaLogic faults you might find helpful here: https://www.fiatforum.com/threads/the-one-and-only-dualogic-failure-thread.425006/

Gearboxes are fairly problem free (although DuaLogic can be hard on clutch), it's the separate hydraulic actuator that bolts on top of the box that causes most of the problems, often due to failing seals.

Some brave souls have rebuilt them. https://www.fiatforum.com/threads/t...ic-failure-thread.425006/page-37#post-4667877

Specialists prepared to take them on are few and far between.

Needs its own dedicated hydraulic fluid.

Must admit I'm not sure if your thread title is meant as a joke... 'Dura' it certainly ain't And the 'Logic' part is debatable too.

 

[rmjbn1]

Re MultiECUScan, they provide the software (free or paid version), you only need an OBDII reader to connect to it.

Some have had success with generic Bluetooth ELM scanners, I use a USB OBDII.

It only gets complicated if you need to connect to other modules (airbag, ABS, power steering) , then you need dedicated adaptors.