Re: Idle problem PLEASE HELP
It's usually best to find out what the problem is before replacing things.
Since it's intermittant, and happens at idle, and you can keep it running with your foot, you've given good clues.
A weak fuel pump, or even a plugged filter, would mainly affect it at higher speeds where the fuel demand is higher. Idle doesn't use all that much fuel.
Since it's trying to die, not just going "thump thump thump" it's doubtful it's just one cylinder doing it - highly unlikely several plug wires are shorting out at the same time. It's possible one is jumping to another - look for whitish marks on the wires - burned insulation, dried smoke.
I suspect dirt or water in the carb. But before replacing/rebuilding it - try the Mexican Tune-up.
You may need help with the keeping it running. Rev it to about 2500, then put your hand or a CLEAN rag over the top of the carburetor, completely cutting all the air off. The engine will die, let it die all the way down, keep it covered completely till it stops.
It'll be hard to start, flooded bad, hold the pedal all the way to the floor (do not pump it) and crank till it starts again.
Now do it again. Sometimes it takes twice.
What you are doing is creating a super high vacuum in the carb, sucking out any water and dirt in the idle passages. Kinda like blowing your nose in reverse.
It helps a waterlogged carb or dirty carb about 80% of the time. Easy! Good trail fix too. That's why it's called a Mexican tune-up - often needed in Baja with the fine silt there. Some folks think it's a slurr.
New filters are always a good idea anyway.
Let us know.