Okay I need help little over two weeks ago i bought a beautiful emerald green 91 firebird with t tops 3.1 v6 non power windows non power locks most complete one ive seen
took it through inspection failed emissions hc ppm was close to 4000 standard is 220 at sitting idle the idle is turned up had a rough idle can anyone point me in a direction so i can get it fully legal i also have trouble getting started you have to hold the gas half way down and keep turning the key and it will eventually crank over did a full tune up about a week ago timing is correct idk what to do tho im lost

 

What do you mean by full tune up? Did you check the injectors? O2 sensor? Idle valve? Vacuum leaks? There are many things to work through. One step at a time and don't panic.

 

i checked the pump did the fuel filter i havent checked the o2 sensor and when you say idle valve do u mean the iac valve? the injectors are good and i cant find any more vacuum leaks

 

IAC yes. Is it clean? Cap, rotor, plugs etc. etc. How do you know the injectors are good?
Fuel pressure? Temp sensor? The idle on the 3.1 is not adjustable. What did you do?

 

Fuel pressure regulator. $75 Borg warner. Will take your HC to 0. Car will start correctly once again. You will need extra security torx bits as they break when you tighten.

You can check your regulator by simply pulling of the vacuum line, it will be wet if you have that much HC in the exhaust.

 

okay update the cat is cloggged im replacing it at end of the month i replaced vaccum hoses and now the car is start great runs a lil rough but the car is getting better just gotta do the brakes and sawy bar links