97 pickup 5 spd 4 cyl 125k

When engine is first started, I have about 10 minutes of 'bucking' shaking, hesitating, and the acceleration isn't quite right. After about 10 minutes the problem usually stops. Noticeable with acceleration but not idle.


Recently replaced fuel filter and added gas treatment. Have NOT had a check engine light!

97 pickup 5 spd 4 cyl 125k

When engine is first started, I have about 10 minutes of 'bucking' shaking, hesitating, and the acceleration isn't quite right. After about 10 minutes the problem usually stops. Noticeable with acceleration but not idle.


Recently replaced fuel filter and added gas treatment. Have NOT had a check engine light!


I had the same problem on my 96. Same thing...replaced fuel filter/checked spark plug gap and things were fine for a week. Check engine light came on and did same thing. Changed first o2 sensor and I didn't have the problem for a year. Check engine light said to replace 2nd sensor. Changed and have had no problems since. Seems kinda odd to me, but it worked.