when it is started in morning everything is fine and when it is taken for a drive and when it warms up the rpm fluctuates from 1000 to 500 and some times evn touch the 0.help needed becoz it is too much irritating .
on cng only? or on petrol or on both
in 96 civic open ur hood luk 4 a thin rubber pipe goin 4m ur engine head 2 da manifold(da metal part after throttle body) it may be not connected or loose !hope it solves it !or ur car needs tunning throttle body cleaning n set da idle rpm stuff !
adjust idling n get car retuned
both are done tuning and rpm settings but some body told that iacv needs cleaning but i dont know where it is in my car and how to open it
assuming no vacuum leaks,tappets are fine,check light is off and ur throtle body is cleanhere is a DIY example https://www.pakwheels.com/forums/d-i-y-projects/151814-cleaning-iacv-idle-air-control-valve
i will ry it tomorrow and tell if it helps me thnx hash4u jz salmanrasheedpsh
goodnight to all.bye