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Sounds like it needs a tune up with spark plugs, wires, cap, rotor, air and fuel filters.

completed tune up with spark plugs, wires, cap, rotor, air and fuel filters. Also, fuel pressure checked and okay. still hesitates at constant speed?

assuming the problem was there before all the work was done and assuming there is and was no check engine light, look for vacuum leaks possibly under throttle body and or elsewhere. Also check for water in fuel. Another thought, check to see if base timing is correct.

timing was advanced a few degrees, set back to 0' TDC, unplugged EGR and added a can of heat... Runs like a champ!!!

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14y ago
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Q: Why does 92 Chevy 350 5.7 hesitates at constant speed?
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