My fuel tank sender unit arrived from Kaz. Gave it a quick clean and did a couple of tests to try and understand how it works.
A youtube video on golf starting from cold problems suggested it was not uncommon for the unit to contribute to fuel delivery problems so I was intrigued to know how.
First thing I found was a one way valve in the fuel return connection. This is no doubt to stop fuel draining back from the tandem pump when the car is stood for a while. The valve seemed to be working correctly on this unit.
Next step was to remove the plastic strainer on the bottom of the unit. It's located on two pegs and just prises off. Could not believe the amount of hardened grease like lumps which came out. Certainly enough to block the fuel supply port.
It's quite labour intensive to strip, clean and re-assemble the unit, so with no internal parts available if anything breaks, I can see why the youtube garage just fits a new assembly
More pics to follow
Cheers Spike
A youtube video on golf starting from cold problems suggested it was not uncommon for the unit to contribute to fuel delivery problems so I was intrigued to know how.
First thing I found was a one way valve in the fuel return connection. This is no doubt to stop fuel draining back from the tandem pump when the car is stood for a while. The valve seemed to be working correctly on this unit.
Next step was to remove the plastic strainer on the bottom of the unit. It's located on two pegs and just prises off. Could not believe the amount of hardened grease like lumps which came out. Certainly enough to block the fuel supply port.
It's quite labour intensive to strip, clean and re-assemble the unit, so with no internal parts available if anything breaks, I can see why the youtube garage just fits a new assembly
More pics to follow
Cheers Spike