when the scanner is hooked up and it is not running the tps voltage is going all over the place and it says that the throttle it is at 30%! i have no clue why this is and it is making the truck run like crap, very sparatic idle and you can hear the iac opening and closing a lot and then all of the sudden it will just come out of it and idle normal and the voltage will be at .36 and the iac is closed. i had this problem a while back and it came out of it and now it is doing it again and i really have no clue what the prob is. i have replaced the tps and the iac and they had no effect. is this a sign of a bad ECM or what? sorry for the long post, trin to vent a little. thanks a lot

 

How did you go about replacing the TPS and IAC? A voltage of 0.36V for the TPS is way too low. Read the tech articles on the home page.

 

i replaced them like 2 months ago, i adjusted it to .54 and it makes no difference. on my snap-on scanner it says to set it between .36 and .60. o reall y wish i could figure this thing out, any help? PLEASE?!?

 

I set my TPS at idle at .60 V to 0.64 V.... Also, I run about 8* static timing. And I set the idle RPM (due to my many mods) to 650 RPM, with the intent to have the minimum IAC count value at idle, so I am looking for about 20 counts from the IAC at 750 RPM with everything hooked up after the TPS/IAC/minimum idle air procedures. When you set the static timing, do not forget the unplug that wire one connector back by the firewall on the passenger side.

 

i finally got it fixed, i bought a new computer and that was it, thanks for all the help