Difficult cold start
MorganKane, I have exactly the same problem with my /6. Hard cold starts, even in warm weather.
Spraying Start pilot into the air filter helps a lot
I think that the problem comes from the fuel pump (in my case, it's the original one and it is 53 y.o.). It works to feed the carb, but I think that it doesn't prevent fuel to come back to the fuel tank when the engine isn't started for a long time.
So, the lines are empty, the fuel pump has to suck fuel from the tank and it takes time
IMO, the best solution : you (and I) have to change the fuel pump.
François
François,
I have added one-way valve after fuel filter. It didnot help at all. So I don't believe it is fuel pump issue.
Also carb accelerator pump gives strong squirt of fuel even cold so there is fuel in carb.
Albeit symptoms are same as yours. Please tell me if you find a solution.. :)
Morgan, the request was for a video of the carb during cold cranking, however the video you posted does not show any pumping of the throttle before engaging the starter. You could have a suzuki motor under the hood for all that we can see. You've been given much good advice but seem to debate instead of follow, even though you are the one who is confused. Pics and video, not assertion.
I expect Finland has only high ethanol content fuel which leans the mixture if not adjusted for it. Few carbed vehicles are so finely setup that no throttle pumps are needed prior to cold start after a few days.
If you won't change anything else, then change your starting technique.
What advice should I follow? I have tested compression, fuel squirt, coil voltage, ballast resistor, battery voltage
Manual says that DO NOT press gas pedal before cold start. However, I have tried all methods:
- Not touch gas pedal at all
- Give it light press to engage choke
- Pump it few times before start
Not any of those methods work. Choke closes fully and also high idle cam seems to work.
Giving a little pilot spray and engine starts right away, so my main suspect goes to carb, but all I can consider is give it ultrasound wash and put repair set to it or replace whole carb. But there seems not to be direct swap carbs available so it is a project also.
It is difficult to take video from engine/carb and start car same time. I mostly start it alone so there is no help available.
It also takes two days or more to this problem arise again so not much possibilities to diagnose or take videos.