. . .sputtering/almost losing power while stationary

i don’t know much about cars - this may be an easy question. i have a 1999 honda civic and recently it has started to feel as though it’s going to die whenever i’m stationary (in drive and park). diagnosis?

You may have a dirty IAC (Idle Air Control) valve. Also, the throttle body may need cleaning.

Have someone mechanically inclined look at this along with changing the fuel filter. Hopefully your fuel filter is in-line and not in the tank.

Add: when was the last time the air filter was changed?