I have had carb icing problems with my Sierra (g13a) from day one. It normally happens at highway speeds in fifth gear, almost always early morning and only in cold weather.
The symptoms are similar to a fuel blockage, surging and hesitating. If I ignore it and keep driving, the fuel consumption increases dramatically and the motor will eventually stop.
I have tried many things over the years to fix it.
Take off the fan and use electric fan.
Remove the automatic choke.
New thermostat.
Partially cover the radiator.
Replace the hot air pipe.
Make a larger and more dense heat exchanger on the extractors.
Put a larger hot air pipe from the extractors to the air intake.
Put a woollen sock on the hot air pipe.
Its time to start thinking outside the box.
![Idea :idea:](./images/smilies/icon_idea.gif)
Light aircraft engines must have carb heat controls. (the older aircraft engines that have carburettors) They have heater plugs in the carburettors. Also some motor bikes , KTM that I know of and others.
Wondering if a diesel engine glowplug and timer some how fitted to the carby might be something to try.
We have some excellent lateral thinkers in the Suzuki Club.
![Wink ;)](./images/smilies/icon_e_wink.gif)
Any ideas? ( besides a efi engine)
Regards. Wayne.