How can one test if the IAT sensor is working?

I've got a FRST OFAC engine which is struggling to return 25mpg (as in its not returned that yet), and I'm thinking IAT could be a culprit. A local tuner said the poor fuel economy could be it running lean at -ve vacuum and turned the fuel pressure up and said to test it at that. It has improved the missfire under -ve boost but no effect the the fuel economy. The car also has a piper t285t2 and is only set up on a 165chip @ 11.5psi on a t2, could this cam cause such poor economy? I know i'm loosing some lower down torque and 'drivability' not running it at high boost and with the foot down all the time, but can it be that bad?

When I unplug it at idle the car does nothing, can I safely drive with it unplugged and look for changed? what changes should there be?

Does a broken IAT return a fault code? does anyone know the code?

Cheers
JAmes.

 

does this help ?

P1109 IAT - B Sensor Intermittent
P1110 IAT Sensor (D/C) Open/Short
P1111 Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage
P1112 Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage
P1113 IAT Sensor Open/Short

 

Nah, i meant a 2 digit code that you can read using and LED on the diagnostics port.

I think i'm going to have to make a fault code reader to find out what the codes mean as noone seems to have a list of them.

Cheers though, and UP^^!!!

JAmes.

 

So noone on passionford knows ANY method of testing to see if a IAT sensor is working on a Ford OFAC set up?

What about if i had a BMW or an Evo? could anyone tell me what to do then?!?!?

I remember when fourms were full of useful people with lots of techincal knowlege and a willingness to share it. No its just people asking where to put the dump valve on their scooby. poor show.

JAmes.