iight i have a JDM b16a swap in my 96 hatchback, and i when i first start the car it idles at 1,500 RPM and then in like 3 min it starts to go up to 3,000rpm, ok i turn off the car then start it up again and it idles at 1,000rpm, ok so i turn off the car then i start it up again and it finally idles at 750rpm but if i start the car on the 6th time it idles at about 450rpm and feels like it is suffercating and will evenually die out, but will start right back up and idle perfectly. and the v-tec comes on at about 5,000rpm,

USDM ECU GSR p.72, i had the jap oil pump senor and all that other stuff replaced with usdm so i can pass emissions and no check engine light, the perfessonal mechanic who did the usdm ECU convertion said all the wiring and stuff is perfect, but i guess he over looked the idleing problem,
need some advice or help please

 

check timing first.

 

iight

 

why are you using P72?

and check your hookups for Evap purge. undo the hose from intake manifold directly to the charcoal canister, your idle should go up, rev it fo ra while, then hook it back up - your engine should die on first ignition, but let it sit for about 30 seconds, and then ignite again, your idle should stabilize. get a ECU like a P30 that goes with that motor of yours