When i start my car i gotta sit there and feather the gas pedal untill i hear the intake start sucking air. i thought it was the map sensor so i put one on it and its still doing it, runs a little better though. any ideas??

 

Could be a stuck/clogged IACV. The IACV (and the FITV if below 60 F) are supposed to let maximum air in during starting so it is not necessary to press the gas pedal.

Also check your TPS with a voltmeter. Turn the key on but don't start. Connect meter plus to the center wire of the sensor (sensor still plugged in) and minus to ground. Voltage should start at 0.5 volts and increase smoothly to 4.5 as you open the throttle.

 

ok sounds good. this will work on my 95 del sol? and where exactly are they lol

 

ok sounds good. this will work on my 95 del sol? and where exactly are they lol

 

i forgot to add that the first start of the day its fine after that is when all the problems start

 

is the IACV mounted to the bottom of the throttle body? if thats it is it suppose to have coolent in it?

 

That's probably the FITV. (Fast Idle Thermal Valve) When the coolant is below 60 degrees F, i.e. right after a cold start in the winter time, it lets even more air into the engine to make it idle fast. Once the coolant warms up even a little, it closes off.

On a manual transmission car the IACV is usually on the back of the throttle body. It also has coolant in it. The purpose of the coolant here is to warm up the valve to preheat the air flowing through it. This makes the idle smoother in cold weather.

The IACV has an electrical connection, the FITV does not.

 

ok ill try to get that done its been a little to cold to work out side lol. the guy i bought it off of said that i might want to replace that anyway so maybe ill just get new one