1990 Mk2 Golf GTI 1.8 8v PB Just wont start :(

[Crasher]

When you spin the dizzy, you should get four sparks per revolution on the king lead.

[marneya]

Hi Crasher, yes indeed, that's my problem...no spark at all.... any ideas why?

[Crasher]

Clicks when it hits the points? Did I send you my article on the PB?

[marneya]

It does click mate and you hear the injectors too.. but still no spark coming from the HT lead off the coil.
You didn't send me the article mate, greatly appreciated if you could.
Cheers!

[Crasher]

If you here the injectors click and the fuel pump fire up whilst you rotate the dizzy that means the ECU is seeing the hall sender pulse and responding accordingly BUT it may not be sending out the ignition amplifier signal on the green wire from pin 25 of the ECU to pin 6 of the amplifier. Disconnect black power feed wire to terminal 15 of the coil (there are two black wires, one from the fuse box with a line 15 ignition on power and the other powers the amplifier) and with a HT lead set about 5mm from an earth, tickle the power onto the terminal and you should get a crackle of sparks.

[marneya]

Hey Crasher,
So with the car now...i had one spark plug out and when flexing the green wire from the ICU, all of a sudden it started to spark!
I've cut the green wire and put a probe on the ICU end, while cranking and constantly tapping the negative button on the probe, the car started to fire.IMG_20211221_183140530.jpgIMG_20211221_183235452.jpg

[marneya]

Do you know what that green wire does and is it coming from the ECU?
Cheers!

[marneya]

Problem finally solved!
It was the ECU..grabbed one on ebay yesterday and fitted today.
On the plus side, my Golf now has a rebuilt distributor, new TCH, new relays, new ignition switch and excellent grounds everywhere.
Thanks to all for your replies and hopefully this will help some other poor soul in the future.

Cheers all, Merry Xmas and Happy New Year.