No Spark

[James5]

This is a bit of a simple question really but I have got my engine all wired up now with all news sparkies, new HT leads, new dizzy + rota) blah blah now Gone to crank it tonight and I have no spark to king lead, my fuel pump primes

So i have done the usual checks, Relay beside AEI swapped with a known working one (made no difference), now the only thing I can think of replacing is the TDC and checking the AEI is getting power and not a dogey AEI?



I take it on the pic attached the + is the +VE

[Markey Mark (BD)]

If the fuel pimp is priming them it won't be the TDC mate, check that power is going to the AEI and it has a good earth. If it has could be a faulty AEI unit mate.

[James5]

If the fuel pimp is priming them it won't be the TDC mate, check that power is going to the AEI and it has a good earth. If it has could be a faulty AEI unit mate.


Cheers Mark i thought it would be down to the AEI, will make sure power getting to it tomoz, didn't think about earth will check that aswell tomoz.

[Mart]

Assumuing an o.e setup, if the pump is working it must be getting a signal from the tdc/aei, which proves the aei must at least be powering up.

Check to see if you're getting 12v at the coil + terminal. If so, and there's no ht, it could be the coil-pack.

Edit: Another test is to remove the coil-pack and put a 12v bulb across the coil connectors on the aei - Crank the engine and the bulb should flash in sync/time with the starter rpm. If it does, it's defo an ht problem.

[James5]

Assumuing an o.e setup, if the pump is working it must be getting a signal from the tdc/aei, which proves the aei must at least be powering up.

Check to see if you're getting 12v at the coil + terminal. If so, and there's no ht, it could be the coil-pack.

Edit: Another test is to remove the coil-pack and put a 12v bulb across the coil connectors on the aei - Crank the engine and the bulb should flash in sync/time with the starter rpm. If it does, it's defo an ht problem.


:cooter:Mart, Yes OE setup - Many thanks will do the test tomoz eve

[Markey Mark (BD)]

Assumuing an o.e setup, if the pump is working it must be getting a signal from the tdc/aei, which proves the aei must at least be powering up.

Check to see if you're getting 12v at the coil + terminal. If so, and there's no ht, it could be the coil-pack.

Edit: Another test is to remove the coil-pack and put a 12v bulb across the coil connectors on the aei - Crank the engine and the bulb should flash in sync/time with the starter rpm. If it does, it's defo an ht problem.

Ah yes i forgot, the fuel pump relay works off the AEI's tacho signal wire, i must be loosing it:)

[Mart]

Ah yes i forgot, the fuel pump relay works off the AEI's tacho signal wire, i must be loosing it:)

Nah mate, that's why I mentioned about the o.e setup, just incase the relay wiring had been modified/wired direct to the ignition/battery, etc.

[James5]

Ok done the light test and it did as Sir Mart said flashed with the signal so I decided to put the coil pack back in and try one of the smaller ht leads in place of the king lead to which I have spark so looks like knackered king lead. Looks like trip to halfrauds tomoz to get one