my car doesnt start a 3000 RPMs in the contrary when i turn on the car i have to keep the gas peddle pressed or the car turns off what could be the problem?

 

do a search on thermowax

 

check the square green plug that plug into the alternator side on the thermostat housing

 

Does the car idle after it's warmed up? More info needed.

 

yes

 

ithis happens first i turn on the car rpms go to 1500 for 1 sec then they drop and keep droping if i dont press the gas ot shuts off and it sounds really rough when i give it gas then like 10 secs later i can hear the engine's noise change.

 

and then the rpms stay at 750

 

Functionally check the rad water temp switch (lower left corner, if applicable). Should be closed above about 60*F...

Good-sized vac leak will also render the 3K system invalid...

BAC system still operational on the car? If so, check it per the FSM or Haynes...

 

why does it feal rough when the engine is cold

 

When's the last time you checked/adjusted the TPS?

 

never just got the car 1 month ago

 

Do that (either do a search or use the FSM) for the TPS, and check for vac leaks, among the other items mentioned by everybody...

 

ok thanks for your help