I've been having high BASE IDLE (Tps disconnected, 1300rpm) problems that has stumped many people. However with TPS connected, the ECu does its job and idles @ 750 fine (depending on adjustment screw setting on IACV). BUT, I know this isnt normal as base idle should be 550rpm, per FSM w/TPS unplugged.


This is the results of my timing with timing light @ 0* and 750 rpm in Park.




Is this normal? I dont even know where it should be, been scanning the FSM but can't find Ignition timing procedures. (yes i know its not adjustable without consult II)


So whats my timing at idle roughly look like? Advanced or retarded?

 

I am having the exact same problem after I did a 3.5 swap. I even get the same timing reading that you do using a timing light and verified it on my OBD2 reader. But, along with being unable to set the idle properly, I also have a random misfire (p0300) that trips a CEL after a while. I have had this random misfire for over a year and feel it is due to the ECU pulling timing to get the idle down. Do you have any misfiring? Did you solve your problem?

Chris