What causes an Idling to drop?

[effone]

nissan / b12 / carb type.

Idling drops from 700rpm to 300rpm which nearly turns the engine off. It vibrates as if somebody is yacking on the car.

any help?

[baker123]

i had the same problem with our old car. the problem was the fuel filter. it was clogged. and water on the tank.

but in my civic vti before it was a different problem. it was the aircon compressor acting up. may parang clutch dun na nagloloko kaya bumbagasak yung idle.

[ryan_pogi]

same experience a couple of days ago.
i haven't check it thoroughly but its gone now.
yup, my suspect is also dirty filter, but i believe the possible culprit is water on the tank.
badtwip.
pag malapit na sa empty tank ko, palinis ko sa gas station.

[=Dj_Free=]

yeah same here.. pero pg nag aircon ako, ang taas nman ng idle. mga guru's help nmn jan....

[momoyster]

usually dirty throttle chamber

[ryan_pogi]

i just put those penzoil(<-spelling)2 in 1 octain booster and fuel cleaner w/ a full tank of gas. . . . whalah, wala na problem.:D