Originally Posted by
2much
Hope someone has some advice on this please, just picked the car up from tuner and said it has a long start, possible fuel accumulator. Started ok got it home no probs just went out in it for a run started no problem stopped for a coffee then would start, just kept cranking after ten mins of me trying to start it it would sound like its trying but like the fuel pump wasnt working. Then after another 20 mins cranked it it started and I drove home, got outside the house and it started straight back up I feel its an electrical fault but any advice would be great thanks
Did the fuel pump work?
Hot start problems are usually caused by a - how do you call it in english? vapor lock? The reasons are either old and worn injectors or a not working one-way-valve on top of the fuel pump.
When you turn off the car and the engine is hot it will heat up the fuel in the fuel lines close to the engine/cylinder head. The pressure inside the fuel system will rise. As long as your fuel system is in good condition, nothing will happen. The fuel has nowhere to go/to expand and the additional pressure will prevent the building od "steam bubbles".
But: with worn (and leaking) injectors or a not working one-way-valve the fuel can expand. Fuel will leak into the cylinder or will be pushed back into the fuel tank. The steam bubbles are - like any other gas - compressible. And because the K-Jetronic injectors are pressure operated these won't open when all the pressure from the fuel pump gets lost on it's way because of compressible gas in the fuel line(s).
Ford doesn't list the valve on top of the engine. But Bosch does. Maybe not for the Ford cars but you can use any other valve (Audi, VW, Porsche, Lamborghini, Ferrari etc.) as long as it's the same connector type. And I'd always recommend to use new injectors after ~100k miles. Don't buy these at Ford. Bosch is the only manufacturer of the K-Jetronic injectors, you might get a good deal at some aftermarket dealers.