Hi all< has anyone got the part number or any pointers on the coil i need for my 1993 Discovery 3.5 V8 ? car died today and has power to the coil but no spark coming out of it. The one ive taken off is an old bosch and just has a series of numbers on it with no letters it has 2 connectors at each side both fixed by a bolt. oh and if anyone has one in the yorkshire area let me know, thanks for the help.
marccleave
Active Member
Have you tested the coil independently?
If you have the ignition amplifier mounted on the side of the distributor this could also have packed up.
To test the coil independently:
Disconnect all the wires from the coil
Pull the main HT lead from the distributor
Plug a spark plug in this lead, lay spark plug on a rocker cover
Using a bit of wire, attach 12V to the +ve side of the coil
Using another bit of wire which is taken to -ve side of the battery, touch this to the -ve side of the coil and you should get a spark at the plug. If not your coil is fried.
If it is the coil, then I think part number for the coil you need is RTC5628G
The G means it is OEM.
RTC5628G | Coil - 3.5 V8 EFI - Lucas
I think the Discovery got the 3.9 V8 in 1994. So an easy way tell if its a 3.9 or not is that it would tell you on the plenum chamber! Big fat "3.9" on it. Unless someone changed it to a smooth 3.5 version with no numbers on it.
If you have the ignition amplifier mounted on the side of the distributor this could also have packed up.
To test the coil independently:
Disconnect all the wires from the coil
Pull the main HT lead from the distributor
Plug a spark plug in this lead, lay spark plug on a rocker cover
Using a bit of wire, attach 12V to the +ve side of the coil
Using another bit of wire which is taken to -ve side of the battery, touch this to the -ve side of the coil and you should get a spark at the plug. If not your coil is fried.
If it is the coil, then I think part number for the coil you need is RTC5628G
The G means it is OEM.
RTC5628G | Coil - 3.5 V8 EFI - Lucas
I think the Discovery got the 3.9 V8 in 1994. So an easy way tell if its a 3.9 or not is that it would tell you on the plenum chamber! Big fat "3.9" on it. Unless someone changed it to a smooth 3.5 version with no numbers on it.
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v8discoian
New Member
The coils should not be any different from the 3.5 and 3.9 models as both use an electronic distributor with an amplifier either bolted on the side of the distributor (200 shape discos and range rover classics) or mounted on a plate near the coil on 300 shape discos and I think soft dash range rover classics which is when the coil moved to beside the radiator as well rather than on the wing.
A lucas DLB198 coil will do you fine assuming you are still using the original dizzy and amplifier or one of RPI's power amplifiers.
But for sure as stated in the above test check the coil first as the standard amplifiers have a tendancy of dieing. If it died when you were at tick over or just would not start one day then I would point the figure at the amplifier not the coil as the transistor in the amplifier will die when the charge point of the coil is at its longest duration (ie low engine speed)
A lucas DLB198 coil will do you fine assuming you are still using the original dizzy and amplifier or one of RPI's power amplifiers.
But for sure as stated in the above test check the coil first as the standard amplifiers have a tendancy of dieing. If it died when you were at tick over or just would not start one day then I would point the figure at the amplifier not the coil as the transistor in the amplifier will die when the charge point of the coil is at its longest duration (ie low engine speed)
