Did you upgrade any of your fuel system components? if not you might want to at least check out the fuel sending unit and pump motor... you may be pumping the amount of fuel that the old engine wanted but your new engine doesn't quite want that much.. hope that helps
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TOYOTA. Table of Applicable Models. ..... The orientation of the ECU depends on the vehicle with ECU pins. Install the ECU fully checking the .... 2MZ?FE. '97.5?'02.1. VEROSSA. JZX110. 1JZ?GTE. '01.8?'04.4. L. T10?b. HW?23.
I don't have a "diagram" but here are the different colors and all that kind of information. I hope this helps.
1996 Acura Integra Stereo Wiring
5 1/4" Doors
Left Front (+)
Left Front (-)
Right Front (+)
Right Front (-)
6 1/2" Side Panels
Left Rear (+)
Left Rear (-)
Right Rear (+)
Right Rear (-)
this vehicle is running well rich from the sound of it so it could any one of a number of things from a choked up air filter to a intake pipe collapsing inside the pipe .then it could be the control for the injectors so again anything from the mass air flow sensor in the air intake pipe to a faulty ECU computer .The only way to be sure to locate the fault is to ask dealer with more specialist diagnostic equipment than just a code reader ,they will be able to read the whole engine management system which you cannot do with a code reader or a scan soft type programme
The possibilities are limitless, I have done many many swaps. My favorite is the H22A, thats a 1992-1996 Prelude into this vehicle. But you can pick almost any fast 4-cylinder front wheel drive honda, the integra GSR is pretty awesome, uses a B16 Vtec engine. The only thing you need is money. :)
Sounds like an oxygen sensor problem. O2 sensors have to be warmed up to around 900 degrees to properly operate, so until they're up to temperature, the ECU ignores them and fuels the engine on preprogrammed fueling maps stored in the ECU. Once they're up to operating temperature, they provide feedback to the computer for properly fueling the engine. Blowing black smoke indicates a rich condition (excessive fuel), which usually is the result when and oxygen sensor is defective. The computer realizes the O2 sensor isn't working right and goes to a rich-fueling map for the engine. Rich running is not damaging, other than it can foul spark plugs and (if untreated for a long enough period) could clog the catalytic converter. This is better than a lean condition (too little fuel) which superheats the cylinders and causes them to detonate, which can fatally damage the engine. I would change out the primary oxygen sensors and see if your problems go away. You may need to get new spark plugs as well, especially if this has been going on for awhile - they may be carbon-covered and not firing efficiently.