traveling at normal speeds engine misses, but when idle or pass it run smooth. on 2001 Chevrolet S10

replace plugs, wires, gas filter and use gas treatment

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1 answer 3 comments
do u have a ck eng light on? if so have codes scanned at auto zone for free and post so we can adv
no ck eng light
have someone scan fuel trim poss inj issue
thanks