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1991 Blazer S10 v6 4.3 TBI - runs fine from cold start like going to or from work, but if I go out in it for lunchbreak, park 10 minutes to go in store (motor is off) go back out, starts OK, but then sputters/bucks when accelerating --continues for about two minutes to do this intermittently. Seems like vapor-lock to me.
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