Electronic ignition system questions

Andries

Andries

Member
Hi,

At the moment my car isn't running but it should be next week. I've had a lot of electrical problems and the old situation was as follows ; it had a separate switch which was powered by the input into the fuse box for fuse 3-4. The switch controlled either 1 ; electric fuel pump and ignition, 0 ; ignition 2 ; lpg and ignition. This was routed via a relay and in the end it's a kind of mess. There is also a 12V feed from the startersolenoid to a relay which controls the twin pullers fans (through a thermostat) and again, not fused.

The current situation will be the following. The fusebox is completely original, apart from the fact that I'll take a 12v feed for the electronic ignition. Lumenition is binned for the likes of the RPI system with Lucas 35 DLM8 with the external amplifier from RPI. This sytem is unballasted. New DLB 198 Lucas coil. The LPG system is out of the car.

First point, when I bought the car there wasn't any wire from startersolenoid and I think that is due to the switch that was there before. It always gave 12 volts, regardless of the postion of the key in the ignition switch (and the starter relay). So I will need to run a new wire from the startersolenoid to the + ve side of the coil? Is my train of tought correct?

Second point, there are two wires from the A&R amplifier going to the distributor. There is a spade connector on the distributor housing, unconnected. Is this meant to be the connection for the low tension wire from the coil? And if so, -ve or +ve?

I'm hoping for some recommendations because I think I'm doing quite well, but I've thought that before.. And I will be fitting Magnecors, can I use the rocker covers clips safely without any warranty issues?
Kind regards,
Andries
 
Good idea is to get the wiring diagram get it on the computer and alter it to what you're planning then post it up here!
Rich.
 
wiringdiagram.png


Hi Rich,
I've made something with paint, hope it works. The standard wiring diagram is too small to make any alterations. Other than that, I don't know. I'm fairly sure about the wire from the solenoid to the positive side of the coil, but I'm not at all sure about the wire between coil and distributor as on my father's car. This because the distributor is a completely different beast compared to the standard one and I don't know what will happen. All the other wire's are wired per instructions that came with the amplifier from Rpi.

Andries
 
Cool will compare this against mine later. should be somewhat similar apart from the tacho.

Rich
 
Hi Andries,

Have you already fitted the Lucas 35DLM8 distributor or is it waiting to go in? The reason I ask is that it has a wobbly drive for linking with the oil pump drive gear, so I was wondering if you had/were fitting either an SD1 timing cover or the later oil pump gears and a spacer plate?

There were two versions of that distributor, one with a power amp attached to the distributor side, the other had it mounted remotely. There was also a 3 pin and a two pin version. Which one do you have?

Ron.
 
Hi Ron,

Thank you for your reply. Yes, I've fitted it. It's a new unit and I did intend to swap the drive gear for the original one because that one should be mated to the oil pump drive but, it was cracked. It has two vertical cracks, one above and one below the drive gear! Neither, it is a 3.9 Range Rover unit so I assumed it's a straight swap. The first, two-pin, version was one the car connected to a Lumenition unit. I installed the later 3-pin unit and removed the power amp attached to the distributor side. This revealed two pins, which in their turn are now connected to Rpi's remote power amplifier.

Next to the position of the attached power amp is a standard Lucar, male. It's mounted to the housing of the distributor and as far as I can tell, it doesn't really do anything. Is this intended for the wire between coil and distributor?

I'm stumbling through serious putholes in my knowledge here..
Andries
 
The terminal on the side of the distributor body is almost certainly a additional earth. Would recommend using it to protect your module from burnout due to a spike or leak from high KV from the secondary ignition (leads, cap etc..)
 
wiringdiagramiiiu.png



Thank you, I've fitted the earth cable from the distributor housing. Is this an extra protection? Because you'd expect the distributor to be earthed together with the block.

I'm still wondering about the cable from the startersolenoid to the coil. I will get 12V from the unballasted wire during starting, so.. what is the point?
 
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