Club126UK

Fiat 126 Chat => Fiat 126 Mechanical Problem Solving => Topic started by: nalonso on September 26, 2019, 03:13:21 PM

Title: Not running smooth at and above 70km/h [SOLVED]
Post by: nalonso on September 26, 2019, 03:13:21 PM
Hi fellows:

The Polski (aircooled) is not running smooth at and above 70km/h. I've noticed that when I change from 2nd to 3rd gear, if I do it faster than usual, the engine does like is running out of gas for a sec, but immediately  it recovers. Above 70km/h, the engine is like missing sparks, so it is not running smooth. If I accelerate further, it gets worse and start feeling like jumping. I've been suspecting of air in the gas lines, but yesterday I changed to an electric one. I have to say that now it goes a little better, and since my hoses are new (transparent silicon) I don't see any air on them.

So... I don't know where to start looking:
- Spark plugs
- Anything inside the distributor
- TIming
- Carb

Any suggestions?

All the best!
Title: Re: Not running smooth at and above 70km/h
Post by: nalonso on October 22, 2019, 04:32:35 PM
Solved!

I gave my carburetor a deep clean, following this guide:

http://club126uk.co.uk/forum/index.php?topic=11723.0

Now it goes up in 3rd to 60km/h without a hitch, and in 4th goes up to 80km/h really nice!

I'm very happy with the result.
Title: Re: Not running smooth at and above 70km/h
Post by: nalonso on January 06, 2020, 02:34:30 PM
Even better, I also set the timing following this video:

https://www.youtube.com/watch?v=-66-GL-VhT8

From 7:27. It worked with my aircooled, classic ignition. This lamp trick is amazing!
Title: Re: Not running smooth at and above 70km/h [SOLVED]
Post by: Guldbergdk on January 07, 2020, 10:01:27 PM
Good to hear. Have the same issue so am doing a full teardown of engine and carb at the moment. My carbs butterfly valves for the secondary intet gets stuck also, causing it to idle at 2000rpm :)

For anyone refurbishing their carb, I can recommmend a soda blaster