I've just bought a 1990 Honda Civic DX with an AT. Lately I've had a hesitation/stalling problem...mainly at stop signs and when merging into traffic as I accelerate. It seems to happen when the car is warm. Seems like if I shift from D4 to D3, the car recovers. If it stalls, sometimes it will start right away, other times it needs a good 10 minutes...that's a problem when you're merging into traffic.

Replaced the fuel filter, changed some temp fuel sensor, checked the fuel pressure, had it in the shop for 8 hours. No codes, no ideas from the shop.

Anyone have thoughts?

 

My parents had a similar problem before....but on a 93 Plymouth Voyager. Dunno if this will be helpful, but it turned out to be the crank position sensor.

 

Sounds to me like an intake manifold leak.

 

vacuum leak, or maybe fuel pump/line/injector clogged

 

Ever had a rebuilt tranny put in?