Hello guys, im new to the honda world, so i just picked up a decent 97 civic coupe, d16y7, 5spd, i love the car, great on gas, normal mods, exhaust, coil overs, intake, header.. now when i drive the car it runs great, fires right up but it acts like when the car is warm it wont fire, juat turns over an over, i checked if i was getting spark and i am.. now i have read that the efi relay or main relay would cause my symptoms... like i said im new to the honda world, om used to carbed v8s so take it easy on me lol... thanks in advance for any help guys an gals

 

Yes, could be the main relay. check to see if you hear the fuel pump prime next time this happens.

 

Ya i can hear the pump, after it cranks over an over i smell fuel so i assume its gettong fuel??

 

Starting Problems

 

So i did the code trick of jumping a wire on the test port, i got
I got 6-22-41-65-91, now 1 i thinks for the ect sensor the other 2 are for o2 sensors but whats with the vtec codes an the gas fuel tank pressure sensor?? Car is a 97 cici coupe, d16y7 no vtec... could ot juat be the pcm they used??

 

so i swapped out the p2p that the last owner had in the car, now my motor is a D16y7 so i picked up a p2e which the car should of had in the first place. car runs but idles low like a hair up from 0 so say 2-400 rpm an its not surging its smooth.. does the new ecu need to learn the new fuel curves? like do i need to reset the ecu

 

No, but you need to adjust your base idle.

 

The ECU may need 30 minutes or so of driving to learn the proper idle. However, are any CEL codes thrown?

 

ya the cel is on, i have not checked codes yet, how do i set the base idle?? just reset the ecu?? whats the best way to reset the ecu?? i jave read tons of ways buy want to knw what u guys do, just disconnect the batter for 10 mins??

 

The Rules and FAQ stickies are not optional reading.

https://honda-tech.com/honda-civic-d...sting-3002401/
https://honda-tech.com/honda-civic-d...tions-1998336/

 

Pull the codes.

 

plan to pull codes in the am, i will post what i get... did read i wasnt sure if there is a relearn for the ecu tgats why i asked...

 

Pull the codes first.

The relearn is just to drive the car.

 

i pulled the codes, 14,41,65.. iirc 2 are for the o2 sensors the other is for my iac valve?? i disnt have that code running the p2p ecu... also im running a y8 intake manifold, would it be because im running the y8 throttle body still??? bought the car this way so its all new to me

 

NotARaCist already explained this would be an issue for you in your other thread and I remember personally talking with you about it via pm when we were talking about the ecu. You have basically two options, take NARCs advice or convert the entire intake manifold setup to the Y7 setup. NARCs method is going to be cheaper and easier.

 

^^

 

ok so pick up a y7 throttle body, what woukd u take for your tb tony??

 

Are you asking me to see you a y7 tb and iacv blockoff?

 

no rollinmyda had 1 for sale... unless u got a y7 tb for sale??

 

Yes I still have the one we spoke about before but this is the tech forum so it's bad practice to be talking about buying and selling parts in here. That said, you should still have the pms we exchanged saved in your inbox if you still need one.

Now, about the technical aspect of your problem. If you didn't have an iacv code with the P2P ECU the previous owner must have done the wiring conversion for a two wire iacv. So in order to use the y7 iacv you'll have to reverse the wiring mod at the plug and the ECU. Hopefully for your sake the previous owner just depinned the extra wire (orange) and left it dangling but there's a good chance it was just cut and you'll have to extend from the cut sections to the pins or replace the wire entirely. I would suggest you take a look at the iacv plug and the ecu wiring and see if you can locate both ends of the orange wire.

 

so i noticed my 97 civic starting kinda slow today never really paid attention, well stopped at thr store shut thr car off, came back out an wouldnt start.. so i thought hell battery is dead so i pushed started it an she fired right up.. a few mins later shr started running like crap, missing bad. i noticed my dash lights were diming, my speedo an tach did not work, car died an went to restart it an nothing just click.... sound like the alt went out?? starter??

 

Starting Problems

 

why would your starter make the car die while running? is your battery light on?

 

found the prob, new alt an shes good as new