308 GT4 Ignition Problem

You could also swap just the coils:

if the tach keeps working when the power loss occurs = bad coil now on the left side after the swap (as the brown wire on the coil on the right is the tach signal)

if the tach still also fails when the power loss occurs = more likely a bad electronics module on the right side.

 

I would also check some of those wires for corrosion where they go into the spades. On old stranded wire, it's not uncommon for the wires to corrode internally and this can cause resistance in the leads.

Ray

 

It looks just like a coil/ignition module off a Fiat Spider 2000 1979 on. The ignition module is a GM part - used to be available almost everywhere and maybe still is. The ignition modules do get heat sensitive- i.e. fail when hot, work when cold. I always carry a spare in my Marelliplex cars. At $15-20 a module I would just try swapping them out- a trivial job, but do use the heat sink compound.

In an Abarth I used to co-drive in we finished a rally stage by pouring our drinking water over the coil when the car stopped...

Good luck,

Phil

 

Yes, that is one. There seem to be a few different brands, with some claiming to be high performance (and costing more). I have always just used whatever the parts store has supplied. I must have replaced 4 of these over the years, all with the ignition failing when hot symptom. They normally come with a little package of heat-soak compound to put under them when screwing them to the heatsink/coil mount. I think that big alloy coil mounting casting is probably a hint that the manufacturer wanted to keep these things cool!

I believe the coil is matched to these in that not just any-old-coil is suitable. I have never replaced a coil so never fully figured out the specs. etc.

Good luck!

Phil

 

Hi there. I've just posted an almost identical problem with my 308QV. I should have perused first! When you say "power loss" do you mean partial? Or complete engine cutout, because that's what mine is doing, which makes me think the problem is somewhere *before* the coils.