i know what everyone is going to say so ill cut it short. I have a 2nd gen tl-s iacv was swapped from my 6 speed same problem, cleaned the old iacv same problem, bought a new one same problem. Bled the coolant same problem. It'll go down to normal idle but as soon as i rev it pass 1k itll start revving on its own. Either way im pretty sure it isnt the iacv. Can it be the vsa? should i clean it?

 

TPS throttle position sensor has been known to fail on our car- try a search for that

you removed the iacv rod- and cleaned everything? correct?

no vac leaks- motor mounts good (vac boosted models)

 

cant be either of what you listed. I have swapped the throttle body and theres a new iacv in there. motor mounts are good. This morning i took it on a 30mile drive and when i got back i scanned the car and got a p1739 code which says its the automatic transaxle. Please tell me its not the tranny. It shifts fine and drives fine other then the rpm surging.

 

I gave you my best guess based on symptoms and not having any codes

new parts can be bad or installed wrong- I always ck the last things done,, first.

a 30 minute drive would be enough to clog the outlet screens with clutch particles IF thats your problem it could cause surging-rpm issues

how does the trans fluid look and smell- burnt sugar smell = bad news

take a 3 oz fluid sample and have tested- blackstone labs can tell you if the trans is wearing in any strange ways..bearings, clutches,,,

 

Im having the same prob 00 rl i have replaced timing belt water pump iac head gaskets radiator thermostat bleed sys 5 time i also have no heat most of the time can anyone help me