like the title says i have an idle problem that i cant pinpoint. im running a first gen B16 in my hatch and i have recently run into a strange idle problem. when i first start the car the rpm goes real high to about 3k then sounds like a vacuum leak with irregular idle. eventually it drops down to around 1k but still sounds like a vacuum leak. i replaced all my vacuum lines as well as the IAC i bought from the dealer. if anyone has any advice or has run into a similar problem before please help. i appreciate it.....thanks.

 

try this out, take off the intake pipe, and when the car is still running, cover the TB with your hand, now if there's no vac leak it will turn off, and if there is you will hear where it's coming from, use a friend, that **** hurts your hand alittle lol. good luck

 

i still have the problem. i tried the throttle body and hand technique and it stalls out. still throwing the code 14 and my IAC is real hot to the touch. does anyone have an electrical diagram or know which pin the wire goes into the ECU so i can check the wiring?

 

is your ecu spitting coolant system codes? I had problem with my 88 crx si with the coolant temp sensor caused it to idle eratically and flood after I shut it off.

 

hmmmm.......im also throwing a coolant temp sensor code. but thats because the wires were getting old so im going to replace the plug. were you throwing an IAC code as well as the coolant temp?

 

anyone else have any advice?

 

i changed the coolant temp plug tonight. my idle starts off high at 2k now and when it dropps down it fluctuates between 1000 and 1300rpm. not throwing any codes anymore for some reason

 

 

do you have the vac lines hooked up correctly? do you have any vac leaks? do you have good tb and im gaskets? check or replace all of those if you can