Idle Problems

Hey everyone, I have a 2000 gsr with a b18cR swap and lately its been having bad idling problems. I've been told many things such as clean out the throttle body or check if there is a vacuum leak. So far neither of these things have worked. At some points its so bad that the car dies at stops. If anyone has had the same problem please let me know how you fixed it. My car might just need a tune but I'm not sure. Let me know your thoughts.

running on a stock ecu? stock engine? more details please.

Eric the car guy talks about a ton of Honda idle issues on you tube. One of the main causes he said was air in the cooling system. I'd bleed and fill your cooling system and if it isn't fixed move onto the intake.

It's running a p38 ecu with hondata s300. Running on 96 spec itr motor with gsr trans. Air intake, headers, and full cat exhaust.

*p28 ecu. Sorry I typed it in wrong

Whats the AFR when it idles poorly?

My Air to Fuel ratio bounces back from around 14.6 to 20.0. Oh and should I add that when this started happening the gas pedal became sticky. Also it only idles bad after the car is warmed up. I just put in new coolant in it and thats around the time it started happening.

I had that prob, where the evap purge solenoid was it was plugged off, also mine was missing a ground and one was loose behind the engine. I cant rememeber but fixing that got it running and idling right. Mine died at stops barely wanted to idle. Good luck hun hope you figure it out

The vac leak could actually be a sticking throttle plate. Next time this happens try manually closing the throttle pulley by hand and see if that stabilizes the idle.

Eric the car guy

Thank you all. I'll see what I can do and if I don't succeed I'll be back on here. I Appreciate the help.

Clean the iacv on the back of the intake manifold.

Also check your coolant level

Turns out it was the distributor. Thanks for the help everyone.

Alright guys I really need some help on this. So I took my car into the shop about two months ago for the idle because I tried everything. I got the car back after throwing $1800 at the car and it still idles bad. The shop refuses to fix it anymore unless I pay them and I don't have the money right now. They re-did the wiring harness to my ecu, they got a new ecu, and they replaced the distributor. I have taken the new ecu out because they ordered a ls ecu for a type r motor(dumbasses). Anyway i put my old ecu with hondata back in and I got the check engine light to come on but i cant get codes to pop up. I did once but they didn't stay long enough so I could see them. I personally think its a very small vacuum leak but I've had it checked three times for a leak and nothing. I love this car and I want to keep it for a long time. Someone please help all the specs are above. Thanks!