FTO AUSTRALIA

Hey Guys,

Spent the last few weeks and a lot of work and money getting the GR NCT/MOT ready.

On the drive way this morning just as I had the car idling to warm up before the 100km round journey to have the car tested it started to hunt on the idle.

With time against me I was hoping if I arrived with a hot engine and left running pre test I would get away with it.

I sent it through and I passed on all accounts except the emission were not tested as the tester could not maintain a steady rev on idle.

Ran the diagnostic and getting code 13

A quick google has pointed to the: Intake air temperature sensor
I drive a GR and after hours on google and reading forum posts I was unable to find the location of this sensor, as it seems appose to the mivec model the IAT is built into the MAF intake feed(Yet to be confirmed)
What I have done so far to no avail is:

Changed the IFS over

Patched a blow in the flexi on the down pipe

Changed the MAF from a functioning GX
Changed the TPS and calibrated as the steps outlined below
I changed the stepper motor and disassembled and cleaned prior to fitting in to the GR.

With the air intake stripped off and the battery out to allow for more room and aid in a ECU reset apart from rusted bolts its was a pretty easy job.

But alas the car still seems to be coughing slightly at idle.

I have taken a few videos to support this, any help would be great

https://www.youtube.com/watch?v=47_kIXs9Bus

and

https://www.youtube.com/watch?v=WLjWZlF-nbE

I also followed to the best of my knowledge the TPS calibration

With all the above mentioned components removed I attached the multimeter to pins 3 and 4 of the TPS sensor( which were the pins that the value changed on when the throttle was engaged)



I loosened the TPS so it moved freely on the body and reading the multimeter on the below setting



I moved the TPS to the left and the values rose and then to the right and the values started to drop to a point and at the very extreme of the right started to rise again.

So I moved back to the left until I got the lowest value until it started to rise again

The lowest value I could get was 036



I then tightened the TPS back to the body and assembled all other parts.

The car started but the Videos above were taken after the TPS calibration and the slight hunt/cough of the engine is still present.

But on the plus side the engine error code 13 is no longer present.

Again any help, ideas or guidance would be great

Thank you

Wayne

I am having similar issues with my GR with Mivec engine. I suggest checking your spark and double checking for vac leaks.

Anyone else?

Hi Daniel

I am just after switching out the plugs for a full set of denso iradiums.

But funny its around the same time the issue raised its ugly head.

The car does not seem to be drawing air but I could switch out the air intake to be doubly sure.

Are you aware of the IAT location on the GR or am i correct in thinking its built into the MAF

Thank you

Wayne

I suggest double checking all your leads and coilpacks were put back in correctly. Also did you gap your spark plugs/get a set that was already gapped to spec?

You have the multimetre set to test diodes, I think you want the resistance setting (200Ω, 1 click clockwise on the dial).

Hi thanks for the reply

I followed a guide on youtube to set the TPS and it had it set to the diode setting.

It made no sense to me but i didn't have the know how to be sure.

What values Im I looking to obtain from the Ω test? is it the lowest value?

Thank you

Wayne

Hi guys

I checked the sparks and all are torqued in correctly, and the gapping in consistent, I bough the full set of denso's from camskill so everything should be fine.

Still no improvement, Car test is on Thursday afternoon so time is ticking away.

Anyone else got any idea's Im fresh out?

Thanks

Wayne

Did you use a .65 thickness gauge?

You want to turn anti clockwise till you lose continuity. Think it's pin 1 & 3.

Read up about the idle switch part of a mitsubishi tps.

Would you have a link to how to do this?

Im not sure what part the thickness gauge plays

Thank you

Wayne

Download the Fto workshop manual one it's in there.

Or any Mitsubishi manual and a thickness guage has a big part to play in it.