Just swapped a dohc zc in the car and i have a pm6 ecu.. after the car runs for bit the idle starts to jump higher then drops back down and bounces up again.. so on and so on... it keeps doing it and im not sure what it could be.. vacuum lines are all right and i believe the coolant was bled at the shop but it still bounces.. is it the iacv or maybe because i havent turned the heater on yet after i had the car running a few times? is there anything else it could be? any ideas would help. thanks HT

 

Bleed the system just to be sure.

 

ok ill do that tmrw and ill see what happens after.. now how exactly do i do that? lol never done that

 

Either take the rad cap off and run the car adding coolant when it spills over until all the bubbles are out.

Or..

Turn the car on and loosen the bleeder screw. Let the car run until there is a constant flow of coolant then tighten it back down.

 

ok ill try that and post results back on here thanks man

 

try checking the ELD, its built into your under hood fuse box. It had 3 wires on a plug that pugs into it. Try unplugging it and run the engine, if it has the same symptoms, then shut the car off, plug the edl back in, unhook the battery for a while to reset the ecu...i dont know if its really necessary, but I do it anyway... and turn the car back on, if the problem persists, you should try swapping out a new fuse box.