2001 Ford Taurus Q&A

2001 Ford Taurus Question: I need advice on my car. It bucks going down the road

My car bucks going down the road. (Shuts off) but keeps on going. The rpms go up & down along with the speedometer. I've had the plugs & wires changed, new ignition coil, new injector. My mechanic has swapped other parts from another Taurus & nothing has changed. It ran good for a couple weeks & it started acting up again. Any suggestions? Charla -
Answer 1
What codes are stored in the ECM? Without codes you're just throwing parts at it which seems to be the case. -
Comment 1
I had auto zone read my check engine light & it came back trouble shooting p1309 & p0340 -