after warm up. it settles down to 850rpm like it always has. except now it only stays there for a minute then goes back and forth between 600 to 850. but when its in gear it stays at 650 like it always has with no idle hunting. ive used carb cleaner and propane to find vacuum leaks and found none. put new tps new i.a.c. new map sensor. new therm sensor. im getting no codes. set min.air twice with same results. oxygen sensor is only 6 mths old dont think that could be it but I could be wrong. any ideas?

 

Any ideas my cfi seems to be the same ?

 

my car still does it.i even took it all back apart and put another new set of gaskets from intake up. new egr and lines too. im just going to live with it.

 

I am having a similar problem. I posted a thread here in TPI, Engine Surges,
I found a thread from years past where a guy had a similar problem, replaced all his sensors and no difference, he finally fixed the problem with an injector cleaning. I am thinking this is the issue. I am in the process of running SeaFoam injector cleaner through the fuel. I am a 1/2 through my tank and the problem is still there but it has changed how it is acting...for the better. My car has 75k on it so for 25 yrs of time that means it sat alot, probably with no fuel stabilizer.