my check engine soon light came on. we had 175 miles to get home so we drove it.

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check engine light came on. we shut van off then we started it after we pulled over to walk the dog. it ran a bit jerky until speed got up to 60 then smoothed out, but the light stayed on, about 50 miles from home it started blinking then would stop then blink again. got it home. shut if off.. moved it to park over dirt driveway instead of grass...made some stuttering noises...but moved. what could be wrong??? thanks first time this has happened.