RPM's getting higher and lower

[Dupontster]

On my 416ex the RPM's keep on getting higher one second and then they get lower. Would anyone happen to know what it could be doing. It's like someone is reving it up real high then letting off it. And it won't idle for a minute it will just cut off.

[lol]

jetting maybe......or maybe ur letting off the gas:rolleyes: lol:confused:

[Dupontster]

I think its the jets. We have a set we'll try. No im not letting off the gas LOL. It will just sit there by its self and rev up.

[gojk]

Check for air leaks in the intake. Also could be in the exhaust but I doubt it.

[cals400ex]

you may be too rich on the pilot jet/fuel screw

[Greg Z]

sounds like air leaks spray your motor down with the hose and hear if ur motor is revving to the moon when you do that

[3x440ex]

sound like it may be your air feul mixture screw.

[1969ford]

check the timing, the chain may have jumped a tooth, just enough to make it go all wonky