how to add fuel at idle-1/8th throttle?

[speedy400]

Hi I've notised latly after I let off the throttle when the rpms are still high, it backfires pretty bad, what thing do I mess with to get more fuel in at idle-1/8th throttle?.thanks-darren

[ewalker302]

go up to a 42 pilot jet

:bandit:

[speedy400]

I have a 45 pilot in:) -darren

[wilkin250r]

Isn't this fairly normal? I know it's normal in older cars, they always backfire when going downhill... :confused:

[speedy400]

I'm not sure but I think its hard on something in the motor, and I can cure it by putting in more fuel at idle-1/8th throttle, please someone help me out, trip tmorrow, thanks-darren

[MIKE400EX]

Bump the pilot jet size to a 42 (seems to work for almost everyone). You can also adjust the idle mixture screw. Also check for exhaust leaks near the flange.

[speedy400]

well my pilot is at 45, what way do I turn the idle mixture screw to give it more fuel?
thanks for the helps guys-darren

[a1965gt]

"unscrew" it for more fuel, counterclockwise

[cals400ex]

how many turns out on the fuel skrew are you? i have a similar setup as you and i am running a 45 pilot at about 2.75 turns out on the skrew. i am using the stock needle, one notch down from stock.