Timing problems on the 450 Bomber

[McCabe-Thiele (Ted)]

This might be irrelevant but.....

At the start of your thread you mention a blue light for left & green light for right in your photo it looks like a green wire going to the left side sensor or am I colour blind?

[mo goldie]

well I said that they are around the 0.40 mark so hope they are ok Ash. oh I can get a set at £35 if they are No good off Ebay but do I take a chance ?

Yes roy i did email them 3 days ago but someone told me they are on a thanksgiving hols so might be why I have Not had anything back from them yet so hope they will get back soon.

and yes as long as I can get a spark at least yes I should be able to get it to run and do what you say with the timing light.


if you look at the picture you can just see the blue wire is indeed just visible on the left side and the that is the green coming out of the right side.

Oh just got some so Ha ho More Money but mrs said go for it ..... Oh she a keeper ha lol

https://www.ebay.co.uk/itm/203341447581

[AshimotoK0]

well I said that they are around the 0.40 mark so hope they are ok Ash. oh I can get a set at £35 if they are No good off Ebay but do I take a chance ?

https://www.ebay.co.uk/itm/203341447581

Not easy to measure the primary coil resistance without a decent multimeter capable of measuring very low resistance Mo. Make sure you are on 100 Ohms range when measuring !

Be very wary of aftermarket coils .. some have very low primary resistance .. ideally you need 5 ish Ohm coils.

[mo goldie]

yes I am taken a chance I know but don't know where to get a set from that will be good ?

I have a fluke meter that measure auto ....... I think any suggestions on where to get good coils from ?

[mo goldie]

oh when they get here.... Ash

my first job will be to check them out to see what they read......if Not good they do take returns so that's good........ but like you say 5.0 is better that's what them at Common Motors say to use.

[AshimotoK0]

oh when they get here.... Ash

my first job will be to check them out to see what they read......if Not good they do take returns so that's good........ but like you say 5.0 is better that's what them at Common Motors say to use.

It depends ... ignitions with capacitive discharge CDi use coils that are typically less than 2 OHms ... really depends on the type of electronic ignition,

[mo goldie]

Yes well as I say them over the water say 5.0 with their`s ...... but where do you go ?

[K2-K6]

Worth an overview of wiring to electronic unit to discuss  ?

Ordinarily you'd have power to unit switched by ignition, earth competency to allow the coils to switch, trigger wire to sensors to control that switching (to earth) that goes to unit to toggle switching in time with cam etc. Power to coils and their earth routed to the unit to be switched up and down by the circuit control within that.

Is there wiring diagram with unit ?

[mo goldie]

Hi K2

here is a link to the insulation of the shockwave and a video too.

https://drive.google.com/file/d/1AEyHVfdNqkb4jftnu1B-2Vgs2qu_yUCR/view


https://www.youtube.com/watch?v=zZT8GzZiMDY

all what they have said is what I have done...and double checked tripled checked too.

Cheers

Mo

[royhall]

My starting point would be the black earth cables on the mounting bracket. The one in the video has little chance of earthing as the frames paint is still on. Make up another wire from the same bolt and take it to the earth either on the loom or a good reliable earth on the frame somewhere. Suspect those dodgy red cable connectors as well.

[K2-K6]

Yes, as Roy in that a check for definite volt + supply is there, also a check of earth competency as well.

Seems quite simple to fit Mo. Have you got the leds to show there's power and switching going on ?

[mo goldie]

hi,

yes checked all the earths are good and yes I have the led`s light up and when I try to go to time them as I said they do go out but Not at the LF mark they go way pasted it....... that's where I said to Roy about the timing marks. I have done a TDC with a Dial Gauge and marked the rotor so I Know where that is Now..... but still NO spark ?

[royhall]

Is there no spark to either side? Is there power to the coils when ignition is on? This is very strange as the way it's built it''s like having two separate systems. For them both to fail, what's the odds. What's the common denominator here, what do both sides share. Silly question but you have removed the condensers haven't you.

[mo goldie]

No spark to either side Roy, the two modules one blue one green get there power from the horn + wire and go from them two power the coils then what I can make out the two pick-up`s send the trigger the coils....... did you watch the video ?

as I say all wired up right just No spark ..... i did have hair LOL going like Yul Brynner Now.

Oh yes condensers have been taken off yes

[K2-K6]

It is a bit weird to have no spark from the two separate units as Roy states.

The units (same as points) are only switching the earth wire to the coil  to make that spark. If the led is changing it should be doing that switch at least. It would still spark wherever the timing is set.

You can, with power to the coils, get them to spark by disconnecting THEIR earth from the ignition pack, then hold it against an earth scource, when you pull it off the earth they should produce a spark like that.