hey guys its been a while, well my buddys got a 93 civic w/ a d15, it is idleing strange, tach keeps reving by itself durring idle from about 800 rpms to 15-2000 rpms, it also will jump arround while driving or idleing, it will max out, go to nothing, ect w/o reving the engine. it shuts off randomly as well i believe the shutting off and possibly the reving to be the main relay by the clutch pedal. do you think the tach jumping is caused by that too? or could the gauge be bad? thanks guys

 

iacv... clean it or get a new one....... behind your intake manifold, there sdhould be a attachment with two coolant likes coming in..... remove the 2 12mm bolts and clean it with carb cleaner or brake cleaner.... clean it, or buy it :D... it sucks, i know

 

uh which problem is that pertaining to? its strange, i posted twice i just noticed w/ 2 different titles. i did the first one, went to check on it, it wasnt showing up so i assumed it didnt go through, made the other, now they are both on the forum.

 

IACV is for the idle problem.