The idle started fluctuating on a 1993 probe se, 2.0 5 speed. It was fine untill i changed the driver side cv shaft, drove it into town n filled up w gas. 1 minute after i filled up n restarted it, it started to idle up to 2500 and down to 5-600 n dying out
Sounds like you have bad gas. It can get strong mix of gas to give you the right idle, but when it has water mix, it will cause the car to fire like it should. This will then give you a low, rough, or just cutting off idle. Try mixing water remover in with the gas. You may have to drain the gas out or just drive it like it is until the tank is almost empty. Fill up with gas (from a different store) and you may want to change the plugs after the good gas is through the system. I'm not saying the plugs are bad, but there may be a lot of moisture beads from the water sitting causing rust.
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