Vapour Lock?

[Fingers]

I've got a funny thing happening at the moment with my VX Coupe. It is similar to the trouble that Hamish was(still is?) having, but mine seems to be temp related. Once the water temp gauge has reached the middle of the green band the car just dies as if its run out of fuel, and the fuel filter bowl is empty too which seems to supprt that it's not ignition. I have bypassed that "beautiful" hot starting ciruit that the VX cars have and it's still happening. Does anyone have any ideas and was the fuel pump part of this hot starting arrangement, anyone know? Once the temp gauge is back in the lower third of the green band it runs fine, so at the moment it's all open road driving only, not that I'm complaining about that.

[Shane Taylor]

If you disconnect the fuel line before the carb and empty the contents into a clean bucket :-

a. Does the fuel flow freely
b. Is their any grainy rust deposits in the bucket after fuel is emptied

best regards

[chrisc]

How have you gone about bypassing the hot start system? do you mean the vapor extraction pump or the microswitch that varies the amount of fuel to the engine, or both?

Double check there is no fuel reaching the carb, if this really is the case start attacking the fuel pump :twisted:

[Fingers]

Yeah the fuel's nice and clean and flows well when the engine's cold, I'll need to try this all again after I get it good and hot. I've only bypassed the electrovalve that changes the fuel flow when hot starting, I couldn't get it to start at all the other morning, but it started first pop after I bypassed the valve(behind the power steering resevoir). Think I'll attack the pump next as you suggest.

[chrisc]

I hope you have more luck with your problem than I did with mine. I had the same problem and went through the process you are going through at the moment, which led to me discovered the charred remains of wiring by the suspension tower that had been badly welded for the previous mot.

Not that im bitter about the garage that did it, and didnt tell me, regardless of the huge risk they put me at. At all. Nooo.

[Fingers]

Yeah that's more the line I was thinking, as it's temp related I thought it may be a breakdown in wiring insulation somewhere.