this z is making me nuts, runs great when its cold, after 10 mins of driveing it cant get full throttle, smells funny, it wont take gas, when i stop at a light i gotta be easy on the gas just to get the car moving, if i shut it off for like 2 mins its fime for about 2 mins if that then right back to no power, help

 

Does the car stall at all? Especially when warm and you go full throttle?
This is what my car was doing a few years back; ran good cold, when it warmed up the car got VERY rough, when I hit the gas it would stall and would not start back up until it cooled down.

Turns out, the fuel injectors were bad. Get a multimeter, measure the resistance of each injector. If I remember correctly, measuring 14-17 ohms means the injector is ok. Anything less than 14, the electrics are shot and the injector is garbage.

 

check your injectors,and your temp sensor also.

 

Sounds like it doesn't want to be in closed loop.... check O2 sensors maybe? A lot of things could cause your symptoms so just start with the basics (make sure its had a recent tune up as well). Maybe get a can of carb cleaner and look for a vacuum leak too.

 

i had that problem with one of my blazers, it was the coolant temp sensor on mine,
there are 2 sensors one for the gauge, and the one for the computer i needed the second one.
when i scanned it with winaldl it showed a coolant temp of about -40.
it was 70 out that day.