No. Turning ignition on does not turn on pump in the fuel tank. Cranking the engine starts the pump.
Carista - prime a new fuel filter?
- Thread starter Stripy
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- carista fuel filter
No easy way. Of course you could feed +12V directly to the pump but the fuel pump relay (where it would be "easy" to connect to) is below starter battery.
As described by @Dellmassive here
www.t6forum.com
As described by @Dellmassive here
Carista - prime a new fuel filter?
Is it possible to use carista to prime a new fuel filter.
I can put 12v on the pump in the fuel tank but what cables are for the pump? Which colour is positive and which negative? That should help the filter filled up first right?No easy way. Of course you could feed +12V directly to the pump but the fuel pump relay (where it would be "easy" to connect to) is below starter battery.
As described by @Dellmassive here
Carista - prime a new fuel filter?
Is it possible to use carista to prime a new fuel filter.
Mine was OK. Just make sure the battery is OK before trying.
G6 = Fuel system pressurization pump
Blue/yellow = +12V
Brown = ground
T6b = 6-pin connector on fuel tank
Well, you didn't mention which engine - the below is how it's on mine...
It's funny you said that, I took off the filter supply inlet and then hooked the charger up to the tank pump, it took an age to see diesel and then it was just a trickle, plugged it back onto the filter and removed the outlet, took ages to fill the filter 3 mins maybe 4 and then a trickle out. How much flow should there be? I would guess more than that? The reason I changed the filter was I was getting low pressure warnings. I also changed the pressure sensor on the rail but now I'm thinking it's the low flow on the tank pump and that's the culprit. Is there a way to find out what the flow should be from the fuel tank pump?
That's what the engine repair manual states - to run the pump minimum of 3 minutes.
What were the fault codes?
In the workshop manual "Fuel supply system - diesel engines" page 44 onwards
T6 & T6.1 - Diesel Fuel Supply System Workshop Manual
Workshop manual covering fuel supply system for all diesel engined vehicles This document covers removal/installation of system components like tank/pump/filters etc and also covers misfuelling procedures VIP Membership is required to download...
Have you tried with the fuel cap removed? Just a thought that the tank might be in a vacuum if the breather is blocked??
That's what the engine repair manual states - to run the pump minimum of 3 minutes.
What were the fault codes?
In the workshop manual "Fuel supply system - diesel engines" page 44 onwards
T6 & T6.1 - Diesel Fuel Supply System Workshop Manual
Workshop manual covering fuel supply system for all diesel engined vehicles This document covers removal/installation of system components like tank/pump/filters etc and also covers misfuelling procedures VIP Membership is required to download...
Error code was P0087. So I changed the filter thinking it may be causing an obstruction. The flow rate to the filter was only a trickle but as they use so little fuel that probably makes sense.
Thanks for the link ill give it a read through on the pc tomorrow.
Might disconnect the filter inlet pipe on the passat tomorrow to see if it's the same flow rate for a comparison
OK so I disconnected the outlet pipe from the fuel tank pump and turned it on, the fountain shot up so plenty of flow there. I then disconnected the pipe where it enters the engine bay and again squirted up with plenty of flow. I then checked the inlet to the filter and a dribble, checked the return from the rail, nothing and checked the return where it enters the engine bay and nothing. it seemed like the non return valve was clogged or something so there was a very low flow to the filter. My initial fault was a low pressure on the rail.
I have changed the rail pressure sensor and the fuel filter.
So I connected a charger to the fuel tank pump turned it on, opened outlet from the filter where it enters the high pressure fuel pump and waited, I held the pipe up as much as possible to let as much air out as possible. The diesel eventually came after a few minutes and I connected it back to the high pressure fuel pump. left the charger connected to the tank fuel pump and tried starting and boom it stared. disconnected the charger and put everything back to the way it should be, still starting fine.
Problem now is that it runs but stays in limp mode?
Error codes P0192 "Fuel rail pressure sensor "A" circuit Low"
and 10130 cant see any details for this error.
These errors wont clear, All I have is a carista diagnostic tool and to be honest its crap in my opinion.
Any input would be appreciated.
I have changed the rail pressure sensor and the fuel filter.
So I connected a charger to the fuel tank pump turned it on, opened outlet from the filter where it enters the high pressure fuel pump and waited, I held the pipe up as much as possible to let as much air out as possible. The diesel eventually came after a few minutes and I connected it back to the high pressure fuel pump. left the charger connected to the tank fuel pump and tried starting and boom it stared. disconnected the charger and put everything back to the way it should be, still starting fine.
Problem now is that it runs but stays in limp mode?
Error codes P0192 "Fuel rail pressure sensor "A" circuit Low"
and 10130 cant see any details for this error.
These errors wont clear, All I have is a carista diagnostic tool and to be honest its crap in my opinion.
Any input would be appreciated.
Code P0192 suggests that power feed to the sensor is missing (or shorted to ground). Plug? Wiring?
Unfortunately can't find anything for 10130 - Carista quite often misinterprets manufacturer specific codes thus the best guess is that both codes are actually the same fault.
Update:
I have removed the valve and pipes number in the part number above and bypassed them with pipe to see if there was a difference, I also replaced the original pressure sensor on the rail, the motor factors gave me the wrong pressure sensor but the old one seems to be still good and the problem was the non return valve assembly. The picture attached shows how the valve was bypassed and no there are no errors, when the engine is pushed hard it doesn't go into limp mode for a low pressure fault which points towards the low flow through the valve. I have a new valve ordered so Ill see for definite when it arrives but at the minute there is no issue with the driving. Hope this helps someone in the same or similar situation
Cracking effort. Bet you're made up after probably saving a fortune in labour charges and god knows what parts swapped over by a mechanic.
