Well not sure what he means by a seized head unless it is the "usual" failed head gasket & he couldn't get the head off to fix it.
The EFI is not complicated, you just have to get used to a new set of parts! It's essentially a Bosch system, at the back of the car is a twin hole fuel tank (one for fuel out, one for fuel return), next to that a high pressure pump with filter to the engine bay, then in the engine bay the fuel rail supplies fuel under pressure to the injectors, there is a pressure regulator & return line to the tank. You will also see a different air intake system with an air flow meter. The exhaust downpipe should have an oxygen sensor.
The ECU under the dash gets various readings from sensors like the coolant temperature, the throttle position & the air flow meter, and the O2 sensor. Based on these readings the ECU fires the injectors to allow a precise amount of fuel into the intake manifold. There will be a cold start injector to provide extra fuel at cold start.
As Edward says, change the rubber hoses as the system works at around 36 psi. The fuel pump is interlocked to the oil pressure switch with a bypass circuit for starting (no oil pressure till the engine runs) through a double relay. One problem may be that fuel will have dried up in the system over those 10 years, injectors may be clogged but try it & see!
The EFI system is actually pretty robust, so if the PO did not mess around with it then chances are it will work. BUT check those rubber hoses including the fuel tank supply & return.
Tony
<font size="1">1981 TR7 FHC Cavalry Blue
1980 TR7V8 DHC Jaguar Regency Red - sadly sold!
1977 TR8 FHC EFI Factory development car Inca Yellow</font id="size1">
