Help car idies after revving it need expert help

[95gstclipse]

Sorry for the misspelled topic tittle i dont know how to change it :Ok i have a 1995 gst here's the problem everytime i rev the car it dies because it cant catch idle.The check engine light codes say ,iat circuit malfuction,map sensor circuit malfuction ,mas circuit malfucton.Ive changed the map sensor ,also everytime i start the car the radiator fans turn on ; when i unplugg the maf the fans turn off(very weird)and there is no change to the engine when its unplugged.So i donrt think its my maf thats bad possibly a short in a wire somewhere maybe also my battery light and srs light is on i doubt these lights have anything to do with my problem just thought i bring them up.Any suggestions people.

 

[MacDizzle]

with the maf unplugged there should definately be a change in sound/running condition. i would start there since it seems its not working properly even when conected.

 

[akira235]

Sorry for the misspelled topic tittle i dont know how to change it :Ok i have a 1995 gst here's the problem everytime i rev the car it dies because it cant catch idle.The check engine light codes say ,iat circuit malfuction,map sensor circuit malfuction ,mas circuit malfucton.Ive changed the map sensor ,also everytime i start the car the radiator fans turn on ; when i unplugg the maf the fans turn off(very weird)and there is no change to the engine when its unplugged.So i donrt think its my maf thats bad possibly a short in a wire somewhere maybe also my battery light and srs light is on i doubt these lights have anything to do with my problem just thought i bring them up.Any suggestions people.

First things first, please don't post two threads asking the same question.

Second, spelling and grammar, You're much better than most of the other new members, but please use the shift key, and also press the space bar after you type a period.

Now to your inquiry. The FIRST thing you need to do is replace the MAS and the IAT. Since your car is throwing those codes these are likely the problems, or primary contributing factors, once that is done, tell us the results.

As a general rule of thumb, start with the obvious problems, if the condition remains after those have been fixed, continue diagnosis.

 

[95gstclipse]

First things first, please don't post two threads asking the same question.

Second, spelling and grammar, You're much better than most of the other new members, but please use the shift key, and also press the space bar after you type a period.

Now to your inquiry. The FIRST thing you need to do is replace the MAS and the IAT. Since your car is throwing those codes these are likely the problems, or primary contributing factors, once that is done, tell us the results.

As a general rule of thumb, start with the obvious problems, if the condition remains after those have been fixed, continue diagnosis.

I thought the iat was built into the maf(mas) if I'm wrong please post me a pic of what the iat looks like thanks. Also why would the radiator fans turn off when i unplugg the mas(maf)???

 

[akira235]

It may be, my car has had a gm maf since I got it so I really don't know all that much about stock mitsu mas units.

Honestly, it sounds like you may have a wire short somewhere, the disconnection causing fan to disengage is definitely not normal as far as I know, but the mas could be faulty in its own right.

Have these symptoms existed since you've had the car? Or did they arise recently?

 

[rlacasse1]

Is your BOV recirculated?

Also, you will have just a MAF. No IAT sensor, or MAP sensor.

 

[95gstclipse]

It may be, my car has had a gm maf since I got it so I really don't know all that much about stock mitsu mas units.

Honestly, it sounds like you may have a wire short somewhere, the disconnection causing fan to disengage is definitely not normal as far as I know, but the mas could be faulty in its own right.

Have these symptoms existed since you've had the car? Or did they arise recently?

Yea its had this problem since I got it and I think its a wire short somewhere to or the maf ground wire.