Hi,
I bought XJS one week ago and he broken yesterday. There is spark but I don't have signal control to injectors (ground signal). The power 12V it is only. I check wiring form ecu to injection amp (four resistors in silver box) and are OK. I checked wiring from injection amp to injectors and all OK. I don't have information about power 12v and grounds on ecu plug and from how ecu control this injector fuel? There is crankschaft sensor or something like this and where is he?
Ecu: Lucas 35pin
Injector amp Lucas in silver box
12V on all injectors are OK

Car run on 2 cold start injectors only.
Please help guys.
Adam

 

Hi welcome to the forum.

There is a wire from the distributor to pin 18 on the Lucas ECU. This is a tach input for the ECU and if is broken the ECU does not see ignition pulses, when this happens the ECU will not pulse the injectors. My car is a Marelli so is slightly different and I do not have experience with the Lucas so others may have more specific help.

Here is a link to a great site that has electrical wiring diagrams

Jaguar electrical reference

 

Thanks. Yes you right. Problme was a broken wire from regulator to ecu. Car ranBest regards Adam