ChrisLunar Posted July 24, 2019 Share Posted July 24, 2019 Hi Group I have a 3.0 2007 Fiat Ducato(Lunar roadstar) I have inconsistent lack of power issues, start the engine and it either runs completely normal, or has a lack of power, feels like limp mode, but not sure it its. If I turn the ignition off, then back on, normal power is resumed. Anyone else had this issue as the fitters are struggling to find the fault. When the Engine Management light comes on the computer says Boost Sensor and MAF Sensor So far changed the following, EGR EGR Solenoid Throttle body Boost sensor and MAF sensor Thanks group, Chris Link to comment Share on other sites More sharing options...
tonyishuk Posted July 24, 2019 Share Posted July 24, 2019 Similar fault to that found in my previous 2005 Fiat mhome, which we sold due to the problem. The fault was found to be partly corroded connector in a multi pin connector block mixed with badly made contacts where pins and sockets had climped the insulation but not fully connected to the wire . Basically every pin and socket connection had to be checked. Hopefully your problem is more easily solved. Rgds Link to comment Share on other sites More sharing options...
ChrisLunar Posted July 24, 2019 Author Share Posted July 24, 2019 ***** UPDATE Start the engine-pull off-no power, pulling in for 10 seconds to idle seems to fix the problem??? ATM Link to comment Share on other sites More sharing options...
colin Posted July 24, 2019 Share Posted July 24, 2019 Check the inlet tract for mice. Link to comment Share on other sites More sharing options...
ChrisLunar Posted July 24, 2019 Author Share Posted July 24, 2019 If only that simple. Link to comment Share on other sites More sharing options...
Mickt Posted July 24, 2019 Share Posted July 24, 2019 Similar problem on my 2003 2.8jtd. Computer said Boston sensor but when changing deisel filter all was good. Link to comment Share on other sites More sharing options...
colin Posted July 24, 2019 Share Posted July 24, 2019 ChrisLunar - 2019-07-24 9:33 PM If only that simple. It took couple of thousand miles of occasional limp mode and probably a couple of thousand pounds before the mouse was found in our van, the EGR valve was checked under breakdown cover in France, and a local UK Fiat dealer had started advising replacing various bits without any improvement, when they said 'replace the throttle valve' I decided they had no idea, it took the combined effort of Nick Fisher and his then local Fiat dealer to find the problem, definitely not simple. Link to comment Share on other sites More sharing options...
ChrisLunar Posted July 24, 2019 Author Share Posted July 24, 2019 At the moment it seems related to the start up procedure??? Going to Italy on Friday so I'll keep you all updated if no one highlights a possible cause. Link to comment Share on other sites More sharing options...
Keithl Posted July 25, 2019 Share Posted July 25, 2019 Chris, The resident forum expert on Ducato's is Nick Fisher, aka 'Euroserv' https://forums.outandaboutlive.co.uk/forums/view-profile.asp?action=view&uid=3275 May I suggest you either PM or email him and ask for advice. Keith. Link to comment Share on other sites More sharing options...
witzend Posted July 25, 2019 Share Posted July 25, 2019 Have you had a look at the Fiat Forum Link to comment Share on other sites More sharing options...
euroserv Posted July 25, 2019 Share Posted July 25, 2019 Hello, I think you have a wiring issue. Because you have changed all of the items that could cause the problem, and assuming (because we have to) that all of these items are functioning correctly (but the throttle body may be faulty, there have been a few) then we have to assume that some signals are not getting where they need to. I suggest that the wiring loom and connectors under the engine fusebox need to be checked and then go on to the loom between the ECU and the engine. My guess is that you have a couple of wires rubbing together in the bundle of wires under the nearside headlamp. It is a laborious job to unpack the bundle and check through them but this is where most wiring faults will be found. The reason that you have no power on start-up is because a reading from one of the sensors is not correct or is missing and a few minutes of idling will enable the system to figure out what works and what does not and allow you to drive it to a degree. If the initial period of idling with no power is accompanied by lots of grey/black smoke; the problem is definitely the throttle body or the wiring associated with it. N Or you have a mouse problem. Link to comment Share on other sites More sharing options...
Keffs Posted July 31, 2019 Share Posted July 31, 2019 Hello guys and girls New here although not new to motor homing, if you go to a garage to solve a problem and they change bits and pieces, but it doesn’t solve the problem why do you have to pay for it. they have not solved the problem. Especially if it’s a Fiat dealer they should know what’s up not charge you for trying new bits to see if they work. Is that not what computers are for NO ? Any way just a thought Link to comment Share on other sites More sharing options...
BruceM Posted July 31, 2019 Share Posted July 31, 2019 Keffs - 2019-07-31 8:35 AM . . .if you go to a garage to solve a problem and they change bits and pieces, but it doesn’t solve the problem why do you have to pay for it. they have not solved the problem. Especially if it’s a Fiat dealer they should know what’s up not charge you for trying new bits to see if they work. Is that not what computers are for NO ? Any way just a thought I think it depends on the contract you have agreed with them. If you take the van in and they agree (in writing) a price to fix it then yes, no fix no charge. However I doubt that they would do that without knowing what the fault is. Instead, you are likely to be paying the garage to investigate the issue in which case the time and materials charges would in principle be valid. Of course if the van’s under warranty then that would be a totally different situation. It’s a sad fact that most garages now employ (cheaper) fitters rather than engineers so if the solution to a problem is not obvious, then the diagnostic technique used tends to be to progressively swap bits out to see if things improve rather than to professionally analyse the issue. It’s all part of the dumbing down of skills and replacing with algorithms to save money. We tend to see the same whenever we call a ‘call-centre’ – I’m sure we’ve all got tales of that frustrating experience especially when our request is ‘non standard’. Link to comment Share on other sites More sharing options...
charleydog Posted July 31, 2019 Share Posted July 31, 2019 injectors? symptoms seem similar to the problem i am having with the ford Link to comment Share on other sites More sharing options...
Billggski Posted July 31, 2019 Share Posted July 31, 2019 As it's a base vehicle problem you may want to try the Fiat site. https://www.fiatforum.com/ducato/331754-p2563-turbo-position-sensor.html Link to comment Share on other sites More sharing options...
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