The V8 Owners Forum -

ok i have a tr87 with a v8 fitted from a p6

car was running fine now went to it the other day and non runner, checked the spark and nothing. as its a transplant i need some help to narrow down the fault please. i have a coil mounted on top of an electronic ignition unit made by lucas, it has the following wires, white, 2xwhite/grey and a white black coming out from it. these are connected to the coil with a 12v supply into the + side of the coil. from the dizzy i have 2 wires which plug into the bottom of the electronic unit. my question is how do i find out which part is faulty. how can i test each item and is there a cheap way to replace the electronic unit with some other item. please any help would be appreciated as i a realy stuck as to what to try next. if anyone has a good old points dizzy for sale it would be appreciated

steve

the wires from the dizzy are red and green

from the electronic unit is white/grey to + white/grey to - white to - and white/black to tacho

how can i check the coils ok, read in other posts that if u dont have right one for electronic unit they fail?

steve

I check things like that out by substituting parts, but I've made sure both of my V8's run the same ignition system.

I don't know how you'd check the individual components though.

Chris.

ideally you need an oscilloscope to check the switching of the low tension circuit.

Im led to believe with lucas ignition systems - amps often fail, coils rarely fail.