woww i havent been on here in a while but im really stomped and need some help so im workin at a mini me and the idel is surging from 1 to 1500 only after its warmed up yah i have done all the normal stuff checked for vacume cleaned iacv fiacv changed the temp sen still nothing oh yah one there thing is i can advance and retard timming and i dont get a change at all you know i was leaning toward a new distributor but its brand new idk if its bad or what....plz help me out thanks

 

you may have a bad tps sensor, now to adjust the timing you have to jump the service plug then adj dizzy. the service plug is the plug to pull the cel codes. once your done adj timing remove jumper.

 

yeah i know ur suposed to jump it but i have adjusted it before w.o and it still worked lol

 

When you cleaned the FITV did you screw the white piece all the way in and then back out 3-4 revolutions?

 

no i didnt because the car i pulled it off if was running fine so i figured it was right

 

i doubt it because the ecu will not allow it, if the service plug isnt jumped and you turn the dizzy the ecu will correct it.

 

hmm so do u think that could just be my prob then the timming is a little of but that would really make since cuz when it first starts it dosent surge

 

First the basics: Make sure there's no air in the cooling system (bleed it). Check for any ECU codes. Set the timing to spec. and leave it alone.

Warm up the engine and then unplug the IACV while it is running. With the IACV unplugged, the engine should slow down to below normal idle, or even stall. If it doesn't, air is getting in somewhere. Take the intake pipe off and see if air is being pulled through the hole before the throttle plate that leads to the FITV. The FITV should be completely closed with engine warmed up. Also the IACV should close off with the wire unplugged.

 

i say , unplug the iacv when its surging, any difference? plug it back up then unplug the tps and see if any change.

 

yeah when i unluged iacv it seemed to surge faster but at a lower rpm if that makes since it will surge from like 1-1200 but really fast