Bit of a strange one this but here goes, looked at a non running Supra turbo the other day with big single conversion that wont start, apparently it was fine then cut out when lights turned on, owner turned lights off and it started ok then one day all of a sudden it would no longer start at all so i was called to have a look, it cranks over in pulses for say 2 second then half second gap while keeping the key in the start position, also the fuel pump ran for maybe 8 seconds when IGN only turned on so im assuming after market ECU?
Jumped diagnostic box to get fuel pump on constantly and it had no fuel leaving the fuel rail to the pressure regulator but the pump could be heard and was very loud, went back today with new AEM 320ltph pump and fitted that and i noticed the old pump made virtually no pressure, so that's all good BUT now i still have no fuel entering or leaving the fuel rail BUT i do have fuel going to the pressure regulator from the return pipe??? its like the fuel feed and return pipes have been swapped over somewhere but i cant see any evidence of this anywhere.
Also the owner said it was running fine then just stopped and no one else has been near it? im wondering how on earth this is possible?
This is the car in question, don't spose anyone recognises it?
And this is the current fuel supply pipe feeding the regulator
The fuel rail is fed from both ends and return comes from near centre of the rail to the regulator then to tank BUT this is being fed from the return pipe! god knows how it was running at all?