Hi all, greetings from Spain!

im a new owner of a xj12 1988 5.3 HE.. (is a daimler double six).. im trying to put him back in life.. as i bought it in not running conditions... the car was sometimes starting, and most of the time not..

Now im replacing all the inyectors, distributor, lucas 14AB amplifier, leads, spark plugs, coil, fuel pump, filters...

now im trying to starting and it doesnt... im checking if there are spark coming from the coil, and sometimes it comes, and sometimes not (with out modifying nothing, just putting the key, and cranck.. sometimes i can see a very soft spark with a spark directly connected to the coil, and sometimes not...

So i need some advise where to start looking at..

 

Sometimes the ignition switch fails.

Run a jumper wire from the battery "+" post to the coil "+" post and see if you get a healthy spark when cranking the engine. If so, suspect the ignition switch or wiring from the switch to the coil

Cheers
DD

 

Also check the setting of the TPS (throttle position sensor) under the capstan, and also the state of the two wires that plug into the AB14 unit and come up from the bottom of the distributor.