Fuel Pumps
Re: Fuel Pumps
But they were made with the connectors disconnected, right?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Fuel Pumps
Absolutely, sensors disconnected, measurements made at the back of the connectors coming from the ECU.
RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Re: Fuel Pumps
Ignition in position 2?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Fuel Pumps
In addition, I don't know how many sensors / actuators are fed by the same circuit, but remember I changed the N80 which was clicking like mad during the first minutes after engine start. So it would point to the same suspect or?
Last edited by Classik on Wed May 01, 2019 11:16 pm, edited 1 time in total.
RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Re: Fuel Pumps
If position 2 is when the dashboard is lit without starting the engine then yes.
RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Re: Fuel Pumps
Can you measure between the battery positive and your chosen chassis ground?
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Fuel Pumps
It says 11.6 V (battery is connected of course, key off=position 1 I suppose)
Besides I made further tests regarding this 6 Ohms between the chassis ground and the battery ground, and I guess I have good news on that front. First of all, I completely disconnected the battery (both poles) and measured the impedance between the wires previously attached to the battery and the aforementioned hubs : chassis ground for minus, and 200A fuses for plus. And the good news is that the measured impedance is far below 1 ohm, multimeter says 0,2 ohm (can't be trusted as such but still). So those 6 ohms were just some current leakage. At least some good news!
EDIT : when battery is detached from the car, I read 11.9 V between the poles. Which demonstrates the current leak I've been having for a while..
RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Re: Fuel Pumps
To our not so big surprise, figures are MUCH different with engine started: Pin 2 on both MAFS says 13.6V, and voltage between N80 pins is around 10.8V.
Remind me not to be stupid 2 days in a row...
Back to square one I'm afraid.
Remind me not to be stupid 2 days in a row...
Back to square one I'm afraid.
RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Re: Fuel Pumps
Yeah, OK. So the fuel relay pump is only closed when the engine is actually running / cranking.
It doesn't feel like an electrical problem anyway.
It doesn't feel like an electrical problem anyway.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Fuel Pumps
I certainly trust your experience on that, at least I've learnt quite a few things in the process, but feel sorry if I made you loose some time following that route with me.
Last thing I'll try is to change the connectors though as they are in bad shape, particularly the redish plastic clamp which tightens the connection. Not much hope on that one as I already tried to fiddle with the connector whilst the engine is running without much impact on the MAFs readings, but a deserved maintenance anyway.
I suppose we have narrowed it down to the air leak route. Sounds stupid, but I still need to find a way to connect a manual bike (2 bars) pump to the Sealey kit; of course I'd like to avoid buying a noisy electrical compressor that I have no other uses for.
RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Re: Fuel Pumps
Something like this:
https://www.amazon.co.uk/Bicycle-Motorb ... B007SV90NW
and this:
https://www.amazon.co.uk/Compressor-Con ... B079J5NLBP
and use a spare wheel from the punishment Peugoet for pressure.
/ Or even easier
https://www.amazon.co.uk/Fityle-Plated- ... B07P8CJ2PV
https://www.amazon.co.uk/Bicycle-Motorb ... B007SV90NW
and this:
https://www.amazon.co.uk/Compressor-Con ... B079J5NLBP
and use a spare wheel from the punishment Peugoet for pressure.
/ Or even easier
https://www.amazon.co.uk/Fityle-Plated- ... B07P8CJ2PV
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Fuel Pumps
Sounds like it.. 
But they seem to come from very far away. Delivery up to 1 months from now..
BTW, someone on the VCDS forum suggested a possible efficiency difference between banks, like cylinder compression or ignition issues. Am I wrong to believe this would be seen by the lambda sensors (which read perfectly matched in my case)?
But they seem to come from very far away. Delivery up to 1 months from now.. BTW, someone on the VCDS forum suggested a possible efficiency difference between banks, like cylinder compression or ignition issues. Am I wrong to believe this would be seen by the lambda sensors (which read perfectly matched in my case)?
Last edited by Classik on Thu May 02, 2019 1:48 pm, edited 1 time in total.
RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Re: Fuel Pumps
Meh, ignition problems wouldn't affect the amount of air drawn in at idle / when turbo is off-boost.
Compression: If you had such a bad seal that the piston wouldn't draw air in properly then your car would run like a nail. If at all.
Compression: If you had such a bad seal that the piston wouldn't draw air in properly then your car would run like a nail. If at all.
Daytona RS6 C5 Avant. Viper'd, Billies, Waggers, MTM box brain, C6 stoppers, xcarlink, R8 coolant cap (woohoo)
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
///M3 E46 | XC90 (V8, natch) | Passat GTE | RR Classic V8 flapper
"The major difference between a thing that might go wrong and a thing that cannot possibly go wrong is that when a thing that cannot possibly go wrong goes wrong it usually turns out to be impossible to get at and repair."
Re: Fuel Pumps
Something less to worry about..RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Re: Fuel Pumps
So I've finally found a solution for the air leak test: bought a ten euros bike pump at the local sports store and bluntly cut the hose, heated it as the diameter was obviously too small for the kit and now I finally have a way to push like 2-3 bars into the system! Not the professional type of connection, but at least it works. 
Supposing I've done things right (closed one air inlet and pushed air through the second one), it's now quite clear there's some serious air leak somewhere down below: it doesn't even keep 0.5bar (5 PSI) correctly. Can't tell if it helps for the diagnosis, but it only keeps the very last bit of pressure meaning it doesn't totally come back to standard atmospheric pressure.
The problem is I can't hear where it comes from, and the washing liquid trick didn't give anything so far, meaning there's no apparent leak at the top back of the engine (this would be too easy, wouldn't it?). Admittedly I can't work on the car in closed area, so I depend on the surrounding traffic noise which doesn't help...
Supposing I've done things right (closed one air inlet and pushed air through the second one), it's now quite clear there's some serious air leak somewhere down below: it doesn't even keep 0.5bar (5 PSI) correctly. Can't tell if it helps for the diagnosis, but it only keeps the very last bit of pressure meaning it doesn't totally come back to standard atmospheric pressure.
The problem is I can't hear where it comes from, and the washing liquid trick didn't give anything so far, meaning there's no apparent leak at the top back of the engine (this would be too easy, wouldn't it?). Admittedly I can't work on the car in closed area, so I depend on the surrounding traffic noise which doesn't help...
RS6 C5 Avant 2003 Daytona Grey
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
Loba 650 turbos - Wagner IC - 200 cells cats - Milltek cat-back - Hotchkis bars - Bilstein B16 - MTM Wheels - oem coolant cap
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