I started my car today and i let it warm up a little then started driving. Now i stop at a light and tach is going up and down between 1500 -2000, car is stock with an intake. I need help to locate the problem, anybody?

 

This problem has been covered at least 10 times within the last month, do a search and see what you can find.

 

i did search

 

it happeded to my accord too. It is your ignition coil. I changed mine and it is fixed.

 

it's probally not the coil, clean out your fast idle control valve on the bottem of the throttle body and it should go away, run a search for doing that for more info

 

check if coolant is full and bleed it just in case.if that dont work, check the iacv, and if that dont work take the fitv(if your car is obd1) out and shake it; if it rattles take it apart and screw the little white piece back in

 

your igniter might be crapping out. check that and iacv