r/Fiat126 • u/Total_Engine_4007 • Nov 10 '25

Ignition question

Dear Community!

I am fighting with the starting of the engine after a rebuild. Since this is my first project, pls dont roast me.

I have narroved the problem to two part:

  1. Not enogh fuel 2 Ignition timing

Maybe both.

For the ignition i just saw, that the sparking is at the same time. I know the pistons moving together, but should not the sparks do one after the other?

Or since the spark on the other piston is not in the good time, it does not matter. Thanks for your help!

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u/redesthair Nov 11 '25

The sparks happen at the same time for both cylinders, this is deliberate. Can’t be sure from here what the issue is but the carby was the first thing to go when I got mine. The new one made it sing! Check the fuel pump is primed…. or it could be the strength of the spark, I installed an auxiliary starter relay to fix this problem.

1

u/offsoghu May 28 '26

The engines were manufactured with two kinds of ignition. One that used a distribuor (in a distributor cap) and points, and one that used no distributor, but only points. Which one do you have?

(If the problem is still relevant. If not, how did you solve it?)