I am looking for advice here for my YB Cossie engine. I have new Siemens DEKA injectors, new Motorsport dev. chip, new Ford 071 plugs, new cab and rotor, new HT wires etc but old ignition coil. I am not sure the one I have in the car is okay, but I am having some problems and am now trying to eliminate all possibilities.
Now it is the ignition coil turn. The engine starts, but I am not sure I am getting all the voltage on high rev. What do you guys recommend? How can I test the old coil?
If I go for a new one, what and where to buy?
I found new coil from Standard (Blue Streak) FD478X and should be good for 30.000-42.000 V. anybody knows this one? Is it okay for me to use?
Thanks...

 

what is the problem ? high rpm misfire ? if so, make the spark plug gap smaller to 0.6-0.65mm if you haven't already

 

Thanks Jon, the problem is to much fuel, misfire, and sometimes no spark and am now trying to eliminate all possibilities. The plugs are new, new sensors, new 044 fuel pump, new fuel tank, new filter..... - Now it is the ignition coil turn. How can I test my Ignition Coil?
I want to find out what Coil I can use, or what is recommend, if I decide to buy another.

 

You need to watch the primary resistance is in line with or near to original coil.
A lot go for a so called group a coil, these definitely improve matters spark wise, as are a bit higher energy.
Some have fitted the MSD blaster coil,(not msd uk), there is also a aldon one that can be used to good effect.
tabetha

 

Thanks tabetha, good to hear from you again. Where can I locate/test this primary resistance? I can of course replace it with a new one? In your opinion is this coil (Standard (USA) FD78X, is used for Fords) okay? I am asking because I can´t buy the original coil here, but this one I can buy quite cheap.
And if the one I have is okay, how can I test it?

 

tbh I would junk a std coil as they were pretty marginal at best when new.
I am sure the primary resistance is 0.7 to 0.9 ohm, so anywhere near that will be fine.
It will certainly be ok in the coil power dept with a decent coil that is new.
I will look up the coil you mention.
tabetha

 

I finally found a group a coil to buy.
Thanks guys for your help!

 

When you are looking for the + and - look down between the spade terminals, as they hide the markings there!!
tabetha