Replaced mufler plugs and wires cap and rotor exhuast manifold was loose with cyl5and 2 tightened engine code 351 primary and secondary coil. When on the freeway accelerats fine when you let up on the gas then accelerate it can sputter and try to stall out then if you keep accelerating it will smoke alittle then backfire. Then all ok till you get to let off gass the accelerate.after the freeway on city street it is fine but a liitle rough can stall out if you stop.quick at a light but not always .will replace coils my fear is head gasket or timing chain or sprockets.or worn valve or two.
My car has 145730 miles.
My car has an automatic transmission.
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