Viton is a brand name of a rubber/fluoropolymer elastomer compound that is resistant to petrol/gasoline/diesel fuel, so that check valve should work.

Regarding the location of the valve, if I recall, on the X300 the lines coming from the tank to the fuel filter are rigid, so I would try to find a section of flexible hose in the engine bay leading to the inlet of the fuel rail (near the firewall). If you find a flexible section further rearward between the filter and fuel rail, that would work too, but off the top of my head I think that entire stretch of fuel line is steel.

Please keep us informed.

Cheers,

Don

 

Thanks Mr Miyagi (aka Don B) Will give that a try and post here the result. Have already bough the check valve so just wait for it to arrive.

Thanks

 

There is a flex section there, but it is very difficult to access. The fuel lines come through the trunk/boot floor right above the differential in the rear suspension. You also need the special disconnect tool to get the lines out of the tank.

 

This is inside a twin pump XJR tank, but the single pump tanks are similar. The check valve is at the arrow in red. To access this the tank needs to be removed and the feed and return lines disconnected from underneath and the large plastic access panel on top removed.

 

 

Well just to close this thread i wanted to post here that this problem was cured by changing the injectors!

after 1000km i had no more problems with this after changing all 6 of them

 

Hi Paul,

Thank you for reporting back with your success story! I have marked your thread RESOLVED!

Cheers,

Don

 

Always great to see a problem resolved, but for future reference, are we concluding that fuel pressure was being lost through leaking injectors? An interesting possibility, or could it have been leaking injectors flooding the cylinders?
Im not trying to look a gift horse in the mouth, but am genuinely interested, as this seems to be a "new" type of failure for these cars.

 

well cant say for sure but after changing everything else and because i also had a rough idle,due to this we change the injectors for some used ones and cured not only the rough idle but also the start problem. We didnt expect to cure the starting problem....