i start my car and let it idle it will be fine i put it in drive and try and drive a block and it sputters bad, so bad that it is undrivable. i checked fuel pressure and that is fine, changed o2 sensor and starter. i scanned it and nothing came up, alos there is no check engine light. what do u think could be wrong. it's a 350 tpi speed density. thanks

 

Have you cleaned the throttle body. IAC, and IAC air passages?

 

could it be a failing ignition module?

 

doubtfully... I would go with vader on the idle air control and its doorways seeing fuel pressure (as stated) is okay.

grime and stuff can also be a culprit to many issues, throttle plates can be prevented from opening/closing due to it (my tempo ran like crap, this is what it came to be) so again like vader said, clean the throttle bottle with some carb cleaner and a toothbrush