My fiance has a 90 Accord LX auto.

The other day it started doing some weird stuff. It idles fine when its cold, but once the motor gets semi warm, it wont hold idle, and most of the time it dies. When driving you have to keep it in a low gear and the rpm's up to keep it running. Even then the rpm's are all over the place, every 2-3 seconds the rpms will just drop then go back up. Like the motor is cutting out. If you don’t keep on the gas it will die.

I'm changing the fuel filter later today just because its cheap and should be done. But I don’t wanna try anything else that’s going to cost more.

Help