How good are your problem solving skills?

[Gordy]

Ok folks,
ill outline the problem, lets see if you can diagnose and have a solution. Vehicle is a 1988 GQ Wagon TB42S. Problem is no spark coming out of Distributor on 1 & 4..
New Coil, Capacitor, Condensor, points, Separator Plate, Rotor & Cap. Leads & plugs under 3 months old. Vehicle started missing on way home last Friday and havent been able to get it to run right since. Definately no spark out of cap from 1 & 4...
Any Ideas?

[krbrooking]

Has the dizzy moved in any way, could have put the timing out if so. Sent from me using Forum Runner

[dads tractor]

Firing order 153624 so 1+4 are sequential check for a crack in the cap from being dropped maybe or that everything is sitting square with the same clearances .Apart from that I am absolutely no help as I love the smell of soot and diesel but a petrol guru will surface shortly I'm sure.

[Gordy]

has got me absolutely bamboosled - and broke! I have replaced all the things one would think would cause this, i havent pulled the dizzy out yet, rather trying the think logical approach before resorting to total disassembly..

going away from electrical for one moment - apart from the points totally missing the lobes on the dizzy 4 & 1 on its rotation, what else would, could or is possible for it (mechanicaaly) to fail?

[mudski]

Any play in the dizzy shaft?

[Gordy]

well the vehicle is now in "the shop" trying to find a solution, and it has the sparky a bit perplexed as well, but has told me that the shafts on these things were suspect from new, and only takes a bit of play for it to do this - well I am hoping that this may be the cause. measurements will happen tomorrow and a cause found, sounds like solution may be to ditch the points completely??

[threedogs]

Check at night with the lights out, spark plug caps could be shorting,
condenser could be breaking down also,
Do one thing at a time.
Didn't these early petrols have an extended rotor button as an option???

[dakka1]

seeing as you have replaced everything except the leads and plugs even though they are 3 months old you may have a crook lead or the plugs maybe the problem. but it does seem odd that its on 1-4 and the problem I feel will be in the cap or rotor area. even from new these parts can have issues

[Gordy]

OK Folks, the Cause. A shaft on the Dizzy that has too much play and was pulling away from 4 & 1, so Mudski, you win the prize. Thanks all

[mudski]

OK Folks, the Cause. A shaft on the Dizzy that has too much play and was pulling away from 4 & 1, so Mudski, you win the prize. Thanks all

Boohyeah!!!!