hi, i have a problem that i have no spark on my escort rs turbo, last night it failed to start, there was no spark, then all of a sudden the spark came back, then today the same, it started up fine , then it lost its spark, i have 12v going into the + coil and coming out the - on the coil , but nothing coming out of the ht lead, on the dizzy 3 spade plug connector i have 12v on the first, 5v on the second and 0.1 on the 3rd spade... ive changed the dizy cap and rotor arm but to no success..... please help!!!!!!!! im stuck?????

 

"but nothing coming out of the ht lead"

 

Thing to do is disconnect from the dizzy end and earth the king lead (LT) that goes from coil to dizzy, then with an assistant turning the engine over you should see a healthy blue spark. It's actually when the primary voltage collapses I.E when the ECU breaks the coil's earth it creates the high voltage transmitted from the secondary field.

When this happens it's usually the inducive module thats faulty that causes the problem on the distributor that is assuming ERST has this as I am not familiar with them but that would explain your wires on the dizzy.

Martin

 

sorry meant to say nothing coming out of the ht lead socket on the coil mate.... im baffled by electrics..

 

thanks martin, i think i understand..lol im not the best with electrics, i manage to find my way around them but im no expert, i will give it a go, i thought it may be that the amplifier on the dizzy was maybe at fault??

 

sorry martin yes its an escort rs turbo series 2

 

So there is no point checking HT leads, plugs etc any further as you don't have a spark from the coil, I think that module on the dizzy is an inducive pickup as I said in the post earlier (Basically the simplistic form of breakerless ignition) on the RST I think the info from this is then fed to the ECU which has a vaccum pipe attached to inlet manifold, thats what I suspect the setup to be.

Check the green wire from coil has not broken (This is switched by ECU, the black is switched live) although as you have power it must have continuity but may have broken and shorted somewhere.

Martin

 

thankyou martin, very gratefull for your help, im gona start following the green wire back and checking for a break

 

check the actual dizzy is in working order!(known problem areas m8)