Not sure if this is a PFC problem or something else so I'm posting it here.
Recently my car has been Idling high ~1200-1400 rpm.
I reset my PFC and did the idle test.
Idle settings in the PFC:
Norm: 720
Rear defroster: 800
A/C:900

The idle stabalized at about 1k for normal setting, 850 for the defroster and 900 for the A/C. When you turn them off the idle increases back to 1k. Two days later the car is idling at 1700-1800rpm regardless of whats turned on (when fully warmed up).

Any ideas?

Cheers

 

check your idle air adjustment screw it is on throtle body it faces the driver front fender and it is inside of the hole there. if you look at the stock throtle elbow( the one from top of intercooler to throtle body) there is a little notch in it so you can actually adjust it while its still on the car. so if you are standing next to the driver front tire put your hand under that elbow, where it meets the throtle body you will feel the hole there start the car and see if you can adjust the idel that way first. My screw worked itself out. its a standard screwdriver, just tighten it all the way and then back it out about a whole turn (360 degrees) for a good start

 

Thanks! I'll try that later when I finish work.

Cheers

Tom

 

Shamefully it made no differance. now every time I come to a stop it idle hunts. If I turn A/C on the Idle drops....

Any ideas?

 

If the idle is hunting turn the TPS screw out a few turns. Should lower the idle a bit and it should stop hunting.

 

Search for idle and TPS adjustment procedures.

If the TPS is off, it can make a big difference when it gets set correctly.

 

yes its pretty easy to adjust too go to fd3s.net/tps_adjustment.html they have a really easy to follow instructions on TPS adjustment

 

Hey dude. I know this sounds a lil crazy but try it to see if it will work for you too. I went to the ect. menu then function section on the comander and cycled all off then on and left the isc off its number 5 on the list but i hope this works for you too. GOOD LUCK

 

Did you have TEN and GND jumped while you were fiddling with your air bleed screw?

 

What difference would this make the FSM states to only adjust it to half a turn open anyways?

 

02 feedback turned off?

Vacuume leaks after the TB?

 

Sorry I've been away a few days, this suggestion seemed to work. Would'nt have thought of that lol.

Thanks!

Tom.

 

Once you adjust the screws on the TB you need to have a datalogit and a wideband to finish the idle tuning. The hunting can be caused by air temperature correction tables etc. Trust me, I just went through this whole mess with a friend's FD. It took many hours of fiddling to get it right. You need your AFR to be 12.5-13.0 consistently (sometimes you can go a little leaner) with O2 F/B off and the 4 wires cut from the harness per the installation instructions.

 

hey guys sorry to be writting with bad news but it was a blown motor this whole time for me. I felt like an idiot once I did the compression check which I should have started with but oh well live and learn Rotory For Life. The good news is that I rebuilt the motor myself in the garage and actually did a lil port work while I was in there. I finally ripped it the other night and WOW this bicth halls ***. I have to float the throtle in 2nd gear now to keep the tires from roasting. anyway good luck and I hope to see you all at seven stock next year cant wait.

 

Good to hear you fixed it.