Hey guys first off new here to the forums it’s been a while since I’ve had a project. But I just got this off a guy who didn’t want to mess with it anymore. So a little about the car it’s a d16y8 new motor 900$. He went out bought the computer that goes with it and all. New distributor, new sparks, new wires. New oil pump new timing belt, and a Transmission he had pulled from a 2000 Acura. Whole new exhaust from headers to exhaust. New pan gasket and fuel injectors. So now knowing all that information it starts right up and idles fine(well he said he got the code ran and it’s a misfire. Not exactly sure which cylinder but says it has to be a spark plug seeing how everything else is new. Well those are new too but could of filed out or anything). And the o2 sensor (which he has 3 new ones I just have to put on ). I haven’t picked up the car yet it’s scheudled for towing later today that’s why I’m trying to seek some help. Okay but so the kicker is when you go to put it into gear it starts to idle really rough then about after a few seconds or so it shuts off. Not really able to drive it since it dies out. Haven’t got to mess with it seeing how I won’t have it for another few hours. The other issue is the d4 transmission light is on. So I’m not entirely sure if it has to do with a bad shift selenoid that isn’t allowing it to stay running once shifted into gear ? Or what. Any ideas or theories of what could be wrong would be great. I figured it can’t be that bad considering everything this dude got is new on here. Long story short he dropped like 2400$ into it and basically don’t have time or keep messing with it. (Yes I have paperwork on new motor it was a 900$ motor). So once again thanks very much 🙏 will be checking and update as we try things out and try to get this beast running.

yeah I heard you can have it flashed by a dealership right ? It’s like 165$. I mean the only way it wouldn’t be capatiable is if it didn’t bolt up to the motor and the mounts but then you would just modified it so it would. But it is bolted up and connected. So that leaves the computer that isn’t working with the car/motor ? If that’s the case it could be flashed ?

okay so got the codes read and it’s only blinked one time which indicates a o2 sensor and we think it’s the one of the exhaust but I’ve never once had a car die out from a o2 sensor and I’ve had a quiet of few cars being a Honda with bad o2 sensor. Also think it could of just been low on gas it just kept dying out ? Today we are putting some gas in it and putting on the o2 sensor. Thanks.

okay so we got the issue fixed with the motor and cel light. Now the other issue is the D4 light remains on when put into gear. And it’s a transmission from a 2000 Honda Civic. Do we know how to check a transmission trouble code ? I have never yet so don’t know how to get it to know what’s wrong with it. Some people say that trans needs flashed to that ecu. But I had the same scenario with a 99 Honda Accord the D4 light was on and it was shifting like crap missing 2nd gear so I went to junk yard and pulled a computer from the junk yard and hooked the new ecu into my Honda and it wouldn’t even start (because that computer wasn’t working with the car they said I need it “flashed” to that car specifically?). But this car is starting up even if guy put the ecu that Came with that 2000 Honda Civic instead of the orginal “1998” ecu. I know this may be confusing. But so that would have to mean it’s a shift sensor or something a long those lines. Since the car is starting. Thanks for all the help again. Been getting rain so haven’t been able to work on it much so that’s why I’m still trying to trouble shoot. And don’t just have cash to throw to a Honda dealership to fix all my problems lol.