Pull the vacuum line off the fuel regulator and make sure there isn't gas in the hose. You may also have a leaking injector which would cause both an idle issue and a rich condition.

 

it is fuel injected with no maf im told they didnt start with maf untill 88 or 89

 

regulater test ok but may be injectors as they are original. if i replace them wich it probly needs anyway, think i should go bak stock or higher psi?

 

If the car is stock, stick w/ the 19's. Try pulling the plugs to see if it's 1 cylinder or more. Have you checked it for codes? Are you sure there are NO vacuum leaks.

 

havnt cheked for codes bought a reader but havnt figured out how to use it yet. dont think thers any vacuum leaks tho. the car has a chek engine light but it never comes on even wen the sensors were disconnected . wat dous it take to make the light come on? i have a 95 cobra 5.0 it is stok. if i were to put this motor in my car would it make any real difference? wat is the diff between the regular HO and the cobra HO?

 

the cobra has more power.

 

i am still trying to hunt my idle problums my car kills now every time i start it. how should i go about adjusting the throttle stop skrew?

 

i would keep the screw were it is and try to find the couse to the problem. what all have you looked at trying to fix it?

 

Have you taken the IAC off and tried cleaning that yet?

 

the iac is new i repleced it today. the reason i ask about the throttle stop is because a guy from down the road messed with it and i think he messed it up. dous anyone kno how this system accomplishes idle caus i think its on crak