SpyderJava
Member
Trying to figure out why my car is stuttering sometimes under acceleration, with a problem starting while hot too. I did the valve clearances already (650cc with a .008 and .010 clearances for intake and exhaust, respectively), it's a new carburetor however it is a cheap Chinese build so it could still be a problem. I also installed a 123 Ignition on the vehicle and set static timing, however I'm not sure about the dynamic as I dont have the marks for the 28* btdc, however it seems okay and I get good strong spark at the plugs. But it looks like under acceleration I'm getting air bubbles into the fuel filter from the pump. It may just be vibrations causing it but anyone have an opinion on a cause? I was told a fuel leak somewhere may also cause the hard start while hot, and I think it would potentially cause stuttering if air is getting in, I just cant seem to locate any fuel leaks. All I have are a few minor oil leaks (which I will eventually take care of). I have attached a video for example (in this the choke is pulled all the way to produce a high idle and helps demonstrate the stuttering issue as you can see I open the throttle and accelerate is delayed/stutters.
Video here:
https://app.box.com/s/xuk6kgzo6i9t7u0449re328gds7etvcg
Video here:
https://app.box.com/s/xuk6kgzo6i9t7u0449re328gds7etvcg