Thanks for taking the time to post the graphs, it will give use a good base linelPS Koalar - I forgot to say that my EGR is deleted in the ECU.
Also I should clarify that the 0.1v drop between battery -ve and the block was whilst the starter was cranking.
I'm sure I'll be back before long - an issue like this will certainly recur at the most inconvenient timeThanks for taking the time to post the graphs, it will give use a good base linel
0.1V while cranking is really good result.
0.5V is suppose to be the maximum total on both sides, you test the positive side and negative side seperately and add them together
I have measured close to 0.5V just on the negative side on a working car so there obviously some leeway
If you are getting good crank speed and the alternator, oil pressure, engine check lights are behaving correctly
It's almost certain the fault lies elsewhere
As you have already said it starting to point towards the battery
But it still need a little more testing to sure maybe voltage, RPM and fuel pressure on one graph and compare when working against when it's not
Of cause if it's failing but works fine with the jump pack that would be fairly conclusive
Not showing as a fault. 4000+ psi at idle rising to twice that at 2,000 RPM or so. If o-ring failed, I guess there would be a leak?Do you have enough pressure at the commonrail? IIRC 1250+ bar. There should be a sensor on the common rail. Usually they are sealed with an O-ring that can fail and loose pressure.
|Restrict the injector recirculation pipe so that no fuel can come out during the test.|
That's a new one Mike, I just added the injector cleaner the other day, not many miles since. It can't be the cause of this problem, but worth knowing in case of future issuesMay be unrelated but at the beginning of your thread you mentioned injector cleaner, did problem got worse after that?
I had a 03 Doblo diesel van that injector cleaner in the fuel tank affected the sealing of the plastic fuel pipe connections at the tank allowing air into the system.
It seriously affected starting but once running it was OK.
That would explain the problem, but I think if there was a leak I would smell diesel under the bonnet. Definitely no leak.It was an older non turbo version and used the injector pump to "suck" the fuel from the tank, no pump in tank.
At the time Fiat wanted £200 for the flow and return plastic pipes, so I repaired using fuel grade pipe and crimp on clips which cured it.
Re yours, a fuel filter slight seep can allow air in when stopped, so if left for a few days worse , but if you restart soon after a trip probably OK.Usually if you run your hand around the filter and any fittings then see if fuel smell/wetness.