ok got a b16a3 swap in my 93 hatch. been running good but now its idling more now after i left my headlights on and it drained my whole battery. took the battery to autzone and got it recharged and now it would idle from 700-1300 rpm when im in nuetral or full stop. at start up it idles fine at about 1500 until it is warm. this only happens when i start driving. just cleaned my iacv, new spark plugs, and compression is good all 210/205/210/205. can idling issues be due to my ecu or maybe should i reset my ecu?

 

What does it idle at when the engine is warmed up?

Does the idle move up and down at all?

 

usually it would idl around 700-800 now it idles at 700-1300 rpm it jumps up and down.

 

bleed your coolant system, if that doesnt work its gotta be the fitv on the bottom of your throttle body

 

ok i will try to bleed the coolant system first. i never knew bleeding the coolant would help with idle or have anything to do with idle issues at all haha.

 

x2

Yeah, a lot of things can cause an erratic idle. If bleeding your coolant system doesn't work then it should be your FITV, here's a DIY on how to clean it
https://honda-tech.com/zerothread?id=1564019

%75 of the time an erratic idle is caused by your IACV or FITV, (on an DOHC anways) and since you already cleaned your IACV, the next step is the FITV.

Try that and see if it doesn't fix it.

Goodluck!

 

thanks for the link bro. i will try the fitv cleaning this weekend.

 

Np, let us know if it fixes it