no ignition on ae86

[katapouser]

hello.
i am looking on an ae86 from 85´but it have a few problems.

sometimes there are no ignition on it. it newer failes when jo are driving in it. but sometimes it have problems when jo have run it an turn the motor off, there are no igniton on it. so i cant start it again for the next 2-24 hours.
anyone now what that is?

regards sonny

[jondee86]

Quote:no ignition on it

Does this mean :

1. The engine cranks (turns over) but does not fire ?? Or...

2. The engine does not crank (= starter is dead) ??

Cheers... jondee86

[mirageR]

i have a similar problem,i have changed plugs,leads,distributor cap,any other suggestions

[jondee86]

Try to narrow it down a bit Have you got any spark at all when
the engine is cranking ??

Cheers... jondee86

[mirageR]

hello
i have a spark now and again,im tracing the wiring but im thinking it is the ignitoror the unit that the ignitor sits on,it has two poles on it,any idea what voltage would be on that unit when the key is turned???

[Ivan141]

The unit the ignitor sits on = the ignition coil if I'm not mistaken. It should have a permanent connection to +12V on one end(+), and the signal wire on the other(-).
So that would mean you need to have 12 volts on the + pole of the coil when the ignition is turned on.

(the way it works is that the signal wire pulls the - pole to 0 volts, causing a current to flow through the coil from + to -, which in turn creates a current in the main coil, much like any AC transformator)

[mirageR]

ok,i should have permanent 12v+ on one side and a signal from where??on the other (i presume the ignition).you say the signal wire pulls - to 0 when its activated,am i right in saying this???im new to this cracjk excuse my ignorance
thanks for the help

[Ivan141]

The signal wire should be controlled by your ignition unit, which is the little thing mounted on the coil.. that one is triggered by the ecu.
When the engine is not running, but the ignition is on, both poles should have 12v.

[mirageR]

hello
im back again,i have changed ignition coil,and rotor assemble on the car and it still starts and runs and then cuts out,any other ideas??ignitor??

[Ivan141]

You sure it's the spark that cuts out?? Describe what happens, and when it happens, and also what you have tested and how you've tested it.

Going from experience I can say that the most common starting problems on ae86's are electrical in nature, the following are well-known classics:
-Bad circuit-opening relay
-loose grounding wires on the engine

if the engine runs some of the time, then the ignition must be OK, otherwise it would run like shit.