I've Got a 95 Automatic, 1.8L that has been working fine until it recently began giving me problems.
The problem began with a slight hesitation in Drive when slowing down. Revving made the problem disappear, but a few stops later the vehicle wouldn't stop. I gave it a lot of gas in neutral and got it to start, then it stalled out on me again at a stoplight. Managed to get it started again after cleaning out the throttle body a bit, but it still wants to stall out on me if I depress the gas more than halfway, or if I'm idling at a light or stop sign. Basically too much or too little power, and it wants to die.
Today I changed the fuel filter after the car had been sitting for a few days, and the following happened:
-Car drove normally without hesitation for 3-4 miles, including multiple starts/stops, uphill/downhill, all gears and speeds up to 45mph
-After entering a parking lot and slowing down from travelling at ~30mph, engine hesitated 3 times until parked.
-Did not want to start afterwards, took 3 long tries. Stalled out multiple times on way back home, taking more tries to restart each time. Vehicle lost power, sputtered and died at increasingly more frequent intervals no matter how much gas was applied, but seemed more likely to die with the following events:
--------->Coming to a stop at a light or stop sign (applying too little gas) - revving in D,N or P helps somewhat
--------->Turning at a low speed
--------->Going up a hill
--------->applying too much gas
It seems like once it sits for a bit, it will start and operate normally for a limited time, directly proportional to how long it has been sitting.
What I've done so far/ruled out:
-Tested the battery and it works fine.
-Cleaned battery cables
-Checked air filter, looks fine
-Spark plugs/wires/distributor+rotor replaced about 15k miles ago.
-09/17 - fuel filter replaced
-09/17 - checked PCV valve, "rattle" present
-Tested driving in all gears (P,R,N,D,2,L) - hesiitation present in all after a few minutes.
-Check vacuum hoses using fishexpo101's dish soap method
-Pull plugs and check for proper gap/discoloration