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Technical ducato 2.8 diesel will not start

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Technical ducato 2.8 diesel will not start

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Conor D

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2000 fiat ducato diesel motorhome (not commonrail). Konked-out whilst travelling at 60mph, and had to be towed. Problem seemed to be diesel starvation.
Dropped tank and cleaned significant sludge that appeared to be blocking suction filter. New Diesel Filter fitted, but it still will not start.
Diesel now getting through to injectors, but not confident that it is consistent.
Code light is remaining lit on the dash ?
Not getting a click from solenoid when turning key, so suspected fuel isolation. Mechanically disconnected link to solenoid-arm, and cranked-engine to see if inclined to start..... getting nothing.
Engine cranking, but not inclined to start.
Any thoughts
 
Conor D said:
2000 fiat ducato diesel motorhome (not commonrail). Konked-out whilst travelling at 60mph, and had to be towed. Problem seemed to be diesel starvation.
Dropped tank and cleaned significant sludge that appeared to be blocking suction filter. New Diesel Filter fitted, but it still will not start.
Diesel now getting through to injectors, but not confident that it is consistent.
Code light is remaining lit on the dash ?
Not getting a click from solenoid when turning key, so suspected fuel isolation. Mechanically disconnected link to solenoid-arm, and cranked-engine to see if inclined to start..... getting nothing.
Engine cranking, but not inclined to start.
Any thoughts
Click to expand...

If code light is remaining on, the immobiliser is active or the inertia switch. Check the inertia switch first. If its the immobiliser on that era van the pump is armoured makes it much more difficult to override it.
 
immobiliser would seem to be a solenoid activating a lever-arm on the side of the pump. I have mechanically overridden the lever by disconnecting the linkage, but engine will not fire when cranked.
Suspect the solenoid is gone, so have spare ordered.
Thought disconnection would verify... but must be some electrical fault accompanying this ?
 
Conor D said:
immobiliser would seem to be a solenoid activating a lever-arm on the side of the pump. I have mechanically overridden the lever by disconnecting the linkage, but engine will not fire when cranked.
Suspect the solenoid is gone, so have spare ordered.
Thought disconnection would verify... but must be some electrical fault accompanying this ?
Click to expand...

The lever is activating the cold start advance, don't start buying random parts. If it was that accessible it wouldn't be an immobiliser.

The older model had the immobiliser circuit under a plastic cover you could knock off with a hammer and chisel.

Chances are yours is armoured which makes it much harder. If you have a dremel type tool with a cutting wheel you can cut slots into the shearbolts holding on the armour and remove them with a flat head screwdriver.

53400030-1.jpg


Immobiliser is a very common failure on these.

Similar pump here in this thread, stop solenoid is in 10th picture here
http://www.vegetableoildiesel.co.uk/mybbforum/printthread.php?tid=30073
 
Last edited:
Different pump (see photo of back of pump)
Sorry....'cause I'm a newbie can't post photo's yet. Apparently I have access to "pages" of imogies' but can't show you a photo of the pump !


So, good to know about the cold start advance.
Need to understand the root cause of the code signal on the dash.
Engine konked suddenly, indicative of an electrical fault / break.
I have tried spare key, so do not suspect a key fault.....
but what cause of code signal / how to resolve ?
 
So lots of info in your feedback corcai, thanks !
Because I cannot post a photo yet, I am suspecting my pump is the older model with the immobilser under plastic cover...


So as you said, "Immobiliser is a very common failure on these".
So, what is the fix ?
Access the immobilser unit and replace it ?
Will that reconcile or will the key need recoding etc... ?


The other item you mentioned is the inertia switch.
Where is this located and what should I check for. What causes failure here... do they burnout ?
 
Conor D said:
So lots of info in your feedback corcai, thanks !
Because I cannot post a photo yet, I am suspecting my pump is the older model with the immobilser under plastic cover...


So as you said, "Immobiliser is a very common failure on these".
So, what is the fix ?
Access the immobilser unit and replace it ?
Will that reconcile or will the key need recoding etc... ?


The other item you mentioned is the inertia switch.
Where is this located and what should I check for. What causes failure here... do they burnout ?
Click to expand...

The inertia switch is on the firewall behind the battery, its designed to cut off power to the pump in the event of a collision, people often set if off by banging it with 30kg of lead when removing and replacing the battery.

If you have the plastic cover immobiliser thats the easiest, one of the wires on its connector is switched live, remove the immobiliser, crimp a ring terminal on the switched live wire and screw it onto the stop solenoid.

Mechanics remove it with a hammer and chisel you may want to cut slots into the bolts instead.
 
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