idle problems need help................

my ka sohc is acting up dont realli kno wats causin it.............when i let the car idle it would go down to 500 than it would go up to 1500 i checked the tps, idle speed sensor, n checked for leaks....i dont kno wats causin this............could it be that i need a tune up...i doubt it but but iono...........pls help..........

try resetting your ecu by disconnecting the batt for 10 secs...

Here you go,

http://www.240sx.org/faq/articles/servicing_the_aiv.htm

http://www.240sx.org/faq/articles/idleirreg.htm

http://www.240sx.org/faq/articles/idleproblem.htm

Theres a good amount of idle problem threads on the board search around