General 2011 fiat doblo 1.3 wont start!

[johnboy111]

Hi, just wondering if anyone can point me in the right direction. I have 2011 fiat doblo 1.3 that will not start after changing the injector seals.

The van turns over but will not start.

Initially I thought it had air in the system so bled the system. This didn't work.

I changed the battery this didn't work either.

I plugged in a foxwell diagnostics tool and got the following codes -

u0001 can line error intermittent
u0422 inertia function, intermittent (this one keeps coming up after resetting it)

I've changed the air bag control module and done the fps system reset using the indicators neither of these worked.

The van was running fine before barring the seal blowing. It'll start on easy start.

There is fuel coming to the filter, rail, hp pump etc

Its definitely some kind of electrical fault.

I've checked all the fuse's they're ok, checked all the connectors and sensors and wires these are also ok.

Its driving me insane, what was meant to be a couple of hrs has now turned into 3 days.

If anyone can help that would be much appreciated. Thanks, John

 

[varesecrazy]

Hi
U is canbus network

Im wondering if youve triggered the FirePreventionSystem

Sounds like fuel supply ..or metering.. if it'll run briefly on a spray... ?

(youve got HOT plugs I assume..??)

 

[varesecrazy]

@bugsymike posted with one similar

This might be useful too :

T-Jet Electrical Issues.. | FIAT Grande Punto

I have a '58 plate Grande Punto 1.4t-jet sport... A few weeks ago the orange warning ! appeared on my dash. (the one between the fuel & temp gauges meaning General issues) Had it checked out by a mech no faults found, light goes out. :confused: last week this 1st light reappears but this time...

www.fiatforum.com

Did you get figures for the Rail pressures?

 

[johnboy111]

Hi
U is canbus network

Im wondering if youve triggered the FirePreventionSystem

Sounds like fuel supply ..or metering.. if it'll run briefly on a spray... ?

(youve got HOT plugs I assume..??)

yes it'll run on spray, its got hot plugs.

That's what I thought so I did the indicator reset and it didn't work

 

[johnboy111]

@bugsymike posted with one similar

This might be useful too :

T-Jet Electrical Issues.. | FIAT Grande Punto

I have a '58 plate Grande Punto 1.4t-jet sport... A few weeks ago the orange warning ! appeared on my dash. (the one between the fuel & temp gauges meaning General issues) Had it checked out by a mech no faults found, light goes out. :confused: last week this 1st light reappears but this time...

www.fiatforum.com

Did you get figures for the Rail pressures?

no not yet

 

[johnboy111]

how can i reset the FPS if the indictor reset doesn't work?

 

[bugsymike]

@bugsymike posted with one similar

This might be useful too :

T-Jet Electrical Issues.. | FIAT Grande Punto

I have a '58 plate Grande Punto 1.4t-jet sport... A few weeks ago the orange warning ! appeared on my dash. (the one between the fuel & temp gauges meaning General issues) Had it checked out by a mech no faults found, light goes out. :confused: last week this 1st light reappears but this time...

www.fiatforum.com

Did you get figures for the Rail pressures?

As varesecrazy suggests if you have fuel at the injectors, have you confirmed fuel pressure there also.
On 06 1.3 Multijet Grande Punto of my daughters there was a break/rotted wire inside the loom just at the ECU, but on that it stopped the fuel pump relay and starter so doesn't sound the same issue.
Years ago on a customers Ford Focus common rail diesel, it had failed Mot on injector seal leaking, it was stuck in the carbon gunge pretty bad and I had to buy an extractor kit plus seal cutter kit also as it was the first of these I had had to do. On reassembling it wouldn't start, as you describe. The reason was my fault, not knowing that the extractor kit I purchased which involved unscrewing the injector top nut to fit the tool on the Bosch injector disturbed a tiny ceramic glass ball valve, so even though I had only worked on one injector being common rail it shut down the entire injection process. Rail pressure test should show this.
However a simple leak off test with four individual hoses to four measuring bottles and crank it over several times would soon show if one injector is massively different in "leak off" past the injector seals. On that car I had to replace the injector that I had disturbed with an exchange one and it started right away.
Since then I bought a cheap hand injector tester, a ultrasonic cleaner, read up about them and stripped and rebuilt several, including on the daughters Punto. All the parts were readily available from Darwin Diesels.
I would point out that the cheap old type "pop off" injector pump only goes up to I think about 600psi which is way below normal common rail injectors operate, but I could hold it at that pressure and then with two wires on the terminals I was able to use a commercial 24volt jump pack to to just "brush" a voltage strong enough to trigger the injector solenoid valve to see a reasonable spray pattern. Note I didn't hold the wire on firmly so as not to cause any damage. I have never tested later Pzieo ? injectors and I am perfectly aware that you should use the correct highly expensive specialist equipment, but "needs must when the devil drives" .
The other thing is coding injectors is recommended, but even after fitting new nozzles and pintles etc. maybe I was lucky but they all ran cleanly and passed subsequent Mot smoke tests.

 

[johnboy111]

As varesecrazy suggests if you have fuel at the injectors, have you confirmed fuel pressure there also.
On 06 1.3 Multijet Grande Punto of my daughters there was a break/rotted wire inside the loom just at the ECU, but on that it stopped the fuel pump relay and starter so doesn't sound the same issue.
Years ago on a customers Ford Focus common rail diesel, it had failed Mot on injector seal leaking, it was stuck in the carbon gunge pretty bad and I had to buy an extractor kit plus seal cutter kit also as it was the first of these I had had to do. On reassembling it wouldn't start, as you describe. The reason was my fault, not knowing that the extractor kit I purchased which involved unscrewing the injector top nut to fit the tool on the Bosch injector disturbed a tiny ceramic glass ball valve, so even though I had only worked on one injector being common rail it shut down the entire injection process. Rail pressure test should show this.
However a simple leak off test with four individual hoses to four measuring bottles and crank it over several times would soon show if one injector is massively different in "leak off" past the injector seals. On that car I had to replace the injector that I had disturbed with an exchange one and it started right away.
Since then I bought a cheap hand injector tester, a ultrasonic cleaner, read up about them and stripped and rebuilt several, including on the daughters Punto. All the parts were readily available from Darwin Diesels.
I would point out that the cheap old type "pop off" injector pump only goes up to I think about 600psi which is way below normal common rail injectors operate, but I could hold it at that pressure and then with two wires on the terminals I was able to use a commercial 24volt jump pack to to just "brush" a voltage strong enough to trigger the injector solenoid valve to see a reasonable spray pattern. Note I didn't hold the wire on firmly so as not to cause any damage. I have never tested later Pzieo ? injectors and I am perfectly aware that you should use the correct highly expensive specialist equipment, but "needs must when the devil drives" .
The other thing is coding injectors is recommended, but even after fitting new nozzles and pintles etc. maybe I was lucky but they all ran cleanly and passed subsequent Mot smoke tests.

ok thanks i'll give it a go tomorrow and report back. Has anyone used topdon diagnostics for fiat?

 

[varesecrazy]

Never heard of it..

Most use AlfaOBD or MultiECUScan

Did what you used earlier show rail pressures..? if they are Low it CANNOT inject