Hi chaps,

well a very enlightening day!
Before heading off to Rovertune in Reading, I boosted the battery with my charger.
I have a hefty ABSAAR unit that does either 20A or 180A for starting from a deaden.
Dead handy bit of kit.
So, off I went but with the same old problem as soon as I let the revs drop - until I've been about a mile or so and then she's as sweet as pie and behaves normally.

At Rovertune, Robert puts it on the diagnostics and eventually comes over to me with a puzzled look. The system is reporting fuel pressure too high at the rails! He confirms there is no problem with the battery. He goes off to do a reset (a lift) on the fuel pump and a retest, and comes back with the news that the error is persistent. The bad news is that it means replacing the pump which entails taking the front off apparently, so it's booked in for a couple of days next week. He said the dealer is picking up the tab. I'll keep you posted.
I don't doubt his diagnosis, but if I was picking up the tab, I'd be going hmmmmm a lot.....considering you have no starting or running issues, just when the revs drop funny things happen.

My money is still on the battery/alternator combo...and remember, don't bet money you're not willing to lose!
 
I don't doubt his diagnosis, but if I was picking up the tab, I'd be going hmmmmm a lot.....considering you have no starting or running issues, just when the revs drop funny things happen.

My money is still on the battery/alternator combo...and remember, don't bet money you're not willing to lose!

+1

Slightly odd ....
 
I cannot answer that one, tits, tyres and even worse BOATS. I have/had all three and boats are definitely the most expensive. They say there are two good days owning a boat, the day you buy it and the day you sell it.:D:D

:D

What an inflatable boat ? :p
 
I don't doubt his diagnosis, but if I was picking up the tab, I'd be going hmmmmm a lot.....considering you have no starting or running issues, just when the revs drop funny things happen.

My money is still on the battery/alternator combo...and remember, don't bet money you're not willing to lose!

Let them carry on, if it doesn't cure it then at least he's got a new pump FOC:)
 
I don't doubt his diagnosis, but if I was picking up the tab, I'd be going hmmmmm a lot.....considering you have no starting or running issues, just when the revs drop funny things happen.

My money is still on the battery/alternator combo...and remember, don't bet money you're not willing to lose!


Well I did check the battery again about 2 hours after getting home again and the check tool registered only 50% charge. Now that does not seem right to me after a good 50 mile round trip on the Motorway cruising at 70 I would expect the battery to be tip top, so it does seem like there's something draining it. BTW I reset one of the fuel consumption registers for the trip home and it showed an average of 30.3 mpg on checking it back home - is that reasonable for a 2.5ton tank?

Oh another question I keep meaning to ask - there's nothing in the manual about a rocker switch mounted laterally on the underside of the dash directly below the steering wheel - what is this for? It appears to activate some ignition controlled circuits on the instrument cluster, the steering wheel position, and the heater/blower!! I found it by accident while looking for the CANBUS connector.:confused:
 
Well I did check the battery again about 2 hours after getting home again and the check tool registered only 50% charge. Now that does not seem right to me after a good 50 mile round trip on the Motorway cruising at 70 I would expect the battery to be tip top, so it does seem like there's something draining it. BTW I reset one of the fuel consumption registers for the trip home and it showed an average of 30.3 mpg on checking it back home - is that reasonable for a 2.5ton tank?

Oh another question I keep meaning to ask - there's nothing in the manual about a rocker switch mounted laterally on the underside of the dash directly below the steering wheel - what is this for? It appears to activate some ignition controlled circuits on the instrument cluster, the steering wheel position, and the heater/blower!! I found it by accident while looking for the CANBUS connector.:confused:

That switch is no doubt for when the ignition switch/system fails, it allows you to get the vehicle into a state where it can be hauled onto a flat bed for transportation i.e. set Transfer box neutral, disengage the electronic steering lock and lower the vehicle to transit ride height
 
Well I did check the battery again about 2 hours after getting home again and the check tool registered only 50% charge. Now that does not seem right to me after a good 50 mile round trip on the Motorway cruising at 70 I would expect the battery to be tip top, so it does seem like there's something draining it. BTW I reset one of the fuel consumption registers for the trip home and it showed an average of 30.3 mpg on checking it back home - is that reasonable for a 2.5ton tank?

Oh another question I keep meaning to ask - there's nothing in the manual about a rocker switch mounted laterally on the underside of the dash directly below the steering wheel - what is this for? It appears to activate some ignition controlled circuits on the instrument cluster, the steering wheel position, and the heater/blower!! I found it by accident while looking for the CANBUS connector.:confused:
50 miles will not charge a low battery.
I think, as Saint.V8 said, that you have a battery/alternator problem.
Either the battery itself is duff, not unusual these days or the alternator is not charging well. How are you testing the battery? With a DVM you should see at least 12.5 volts half an hour after switching off and 14.2/14.4 volts at 2K rpm. If your tester is one of those LED red yellow green strip testers, they are terribly inaccurate and may not give you a true idea of battery state. For capacity the battery needs to be disconnected and shunt tested.
 
50 miles will not charge a low battery.
I think, as Saint.V8 said, that you have a battery/alternator problem.
Either the battery itself is duff, not unusual these days or the alternator is not charging well. How are you testing the battery? With a DVM you should see at least 12.5 volts half an hour after switching off and 14.2/14.4 volts at 2K rpm. If your tester is one of those LED red yellow green strip testers, they are terribly inaccurate and may not give you a true idea of battery state. For capacity the battery needs to be disconnected and shunt tested.


Agree !!!
 

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