Back to Forum
Post a Response
    Re: Fiat Ulysse 2.0JTD 2003 common rail Archived Message

    Posted by George Georgiou on January 22, 2008, 1:13 am, in reply to "Re: Fiat Ulysse 2.0JTD 2003 common rail "

    Hi Dave,

    Good to hear from you and thanks for all other replies , any advice is welcome.

    As always trying to apply all the JD stuff on a mobile basis is difficult especially with the recent wet weather adding to the difficulties.

    I looked at the vehicle twice more. Once on a morning last week and it could only be started with easy start to get the guy off to work. Again Launch showed cranking rail pressure at below 130Bar and looking at all the common rail info we need typically 200Bar to get the ECU to fire off the injectors , so this is where the problem lies.

    I retested the pressure and flow today and managed to get the coda to read some more sensible values once I discovered the small brass damping valve had fallen out of the pressure gauge and could have lost this to the injection pump if it had not lodged itself inside one of the adapters . Phew!!! Was I lucky on that. Check your Codas if you have one and make sure this tiny brass fitting is screwed home.Managed to figure out where it had come from inside the gauge neck and screwed it back in.

    Idle is about 36 PSI with 2litres/min flow. On restriction still can only get lift pump to about 42 PSI before flow is so slow that the engine cuts out. On WOT the pressure drops to about 30 PSI but flow increases to more than 3 litres/min as revs increase to max. So I think the pump is probably OK.

    The problem with diagnostics on this vehicle is the really poor access to everyting due to engine being covered by the bulkhead .

    More info from the customer, having looked at the invoices in detail today the injectors HAVE NOT been worked on or examined. Also he admitted that he put about 2 litres of petrol into it in December and to fix this he filled the tank(80 litres) with diesel. However his non-start dates back to 2004 well before this act of madness. He reports no problems after this petrol event except ofcourse for the non start. Also vehicle can be started by bump-start down a hill. Compression test needed I hear you say?

    I am getting hold of the vehicle on my own turf to look at one last time this week.

    The fuel regulator Pulse Width is good 18% on idle and increasing on crank and throttle up to 40%. The oscilloscope on this sensor shows same pulse width ratio as reported by ECU to Launch. But as you say I should do this at the same time as monitoring the Pressure Sensor for relative output and also during the non-start situation.

    I also need to verify glows are actually being powered but access to glow plugs is near impossible, but will verify relay is working and try and current clamp to get an idea of whether the glows are actually doing any work on a 'cold' start.

    Also will try and manage a leak off test of the injectors, although if this was a problem why does it keep running and running very well after its been started?

    Will feed back more when I can.

    Cheers

    George

    Message Thread:


Copyright © uk autotalk