Replacement of control unit and injector(s) fiat doblo 1.3

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georgegiorgian
Posts: 3
Joined: 03 Oct 2025, 19:43

Replacement of control unit and injector(s) fiat doblo 1.3

Post by georgegiorgian »

Hello!

Recently I replace on a Doblo 1.3 Mjt 75 HP 2008 marelli 6f3 the injectors.

I use the command Replacement of control unit and injector and the car wont start no more.

Afther this operation I Coded with an older vesion of mes with kkl cable and show completed. The car dosent start I did sometinhg wrong . Afther I replaced the injectors the car started run a while afther runing this procedure the car dosent start even if i coded the injectors with cantiecar and kkl cable. What should I do.
abarthmultijet
Posts: 268
Joined: 17 Feb 2021, 22:37
Location: Oss, Netherlands

Re: Replacement of control unit and injector(s) fiat doblo 1.3

Post by abarthmultijet »

Hi,

It does crank but it does not start?

Any fault codes present?
Jeep Compass 4XE, Fiat Doblo 263 1.4 t-jet, Audi S4 B8.5, 1.3 Multijet specialist, Uconnect 7 specialist,
georgegiorgian
Posts: 3
Joined: 03 Oct 2025, 19:43

Re: Replacement of control unit and injector(s) fiat doblo 1.3

Post by georgegiorgian »

yes it cranks does not start...i look on mes at he diesel presure and desiered presure as I crank it rises up to 300 340 and when it reaches the 372 bar value the car is almost to start but does nothing I suspect the injectors that loose presure but i am no sure i need to crank long time to get 370 bar . I took out the injectors and try with the other ones to see if pressure build the same ....and maybe I do something bad with this option to eepron cpu i guess....any opinion...thanks
georgegiorgian
Posts: 3
Joined: 03 Oct 2025, 19:43

Re: Replacement of control unit and injector(s) fiat doblo 1.3

Post by georgegiorgian »

changed the injectors no pressure at all 4....6 bars....replacement of rai presuure sensor says failed to exectue This procedure must be executed in case Rail pressure sensor is replaced. maybe from this command the ecu map has been changed...and get corrupted?????
abarthmultijet
Posts: 268
Joined: 17 Feb 2021, 22:37
Location: Oss, Netherlands

Re: Replacement of control unit and injector(s) fiat doblo 1.3

Post by abarthmultijet »

Does the low pressure fuel pump work? The pump inside the fuel tank.
Jeep Compass 4XE, Fiat Doblo 263 1.4 t-jet, Audi S4 B8.5, 1.3 Multijet specialist, Uconnect 7 specialist,
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