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02/01/2021 2:12 am
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At 35-45 mph, my Galant almost shudders when decelerating. I don’t suspect it’s related to an idle problem because you can feel the car slowing, cruising, slowing, etc. Sometimes there’s a slight shudder too. Nevertheless, there does seem to be a vacuum leak or bad IAC because the RPM is high and fluctuates in park. But could a vacuum leak really make the car violently decelerate?
The rims are also larger than OEM from last owner which throws off the speedometer and makes the transmission shift somewhat hard.
The car also doesn’t like to accelerate, it hesitates. I’ve only gotten a P0300 once and it hasn’t come back, so it’s misfiring very intermittently.
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