My Car Is Acting Up again.

[tamdo714]

Problems: 1. idle goes crazy 2. when coming to a stop it wants to die 3. lots of smoke comes out when idling 4. bad on gas 5. when maintaining speed around 4-5k it sputters and makes my car shake back and forth

solution before: when that problem occured i added a bottle of this redline product and it went away for about 3 weeks?

Problem now: they discontinued that bottle and i don't really know if that was my solution. now i just wanted to know if it could be the o2 sensor? this problem occurs here and there and just cures itself. wtf?? help thanks!

[DevilMB3017]

What do you mean the idle goes crazy? It bounces around? Stays high? Etc.?

What color is the smoke coming out the back?

Sounds to me like either a faulty fuel injector if your running lean, or faultly spark if your running rich...