i have replaced o2 sensor twice. rewired my obd-1 conversion. cant stop blowing this code. im getting 200 miles even to a full tank of gas. dont know if that code is the cause of that or not. but im burning crazy fuel and tired of seeing that check engine light. i went back to stock fuel pump and pressure regulator. factory exhaust and headers. i know the headers and exhaust wasnt the cause. but pretty much im back to a stock ls trying to figure out either problem. and ive gotten no where. the car was not showing any codes at obd-0. but does converted. any help. thanks.

When you converted to obd1 did you convert to obd1 injectors as well? do you still have the stock obd0 injectors and resistor box?

Check all the injectors to make sure they're working

im using obd-o injectors. with obd-2 resistor box. i just startd having this fuel problem like last week. i been obd-1 since i did my ls swap like in february. but had the code since i did the swap. figured it was just bad o2 sensor. changed it twice for in case the second one i tried was bad.

What do you mean obd2 resistor box? What car is it from?

96 up teg. think its a 98. its fat and blue.

Integra's only had resistor boxes from 86-91. Civics 88-91 for sure, maybe before then as well. I also know that Preludes had them, pretty sure it was only 92-96.

You sure its a resistor box? Post some pics. Also, if I were you I'd find a set of OBD1 injectors and use those, without the resistor box.

i did DA same conversion but it was throwin dat code wit obd0. when i went obd1 it stopped and stated throwing codes 7 and 9! but as for your problem, i still have obd0 injectors. i only converted my dizzy, ecu, and o2 sensor to obd1. and it dosent throw 41 anymore. hope dat helped!!

for my conversion i have obd-0 to 1 ecu jumper. obd-1 dizzy. i do have the obd-1 injectors havent put them on but why would my fule mess up now. i have the four wire o2. the box im calling a resistor if you look on the right side of integra or civic obd-1 have a grey box. obd-2 have blue box. i have the blue one. i was using obd-0 resistor box when i was single cam. but changed it with the swap. i dont think the injectors are the problem. if so it would have been doing this from start not four months later. and code 41 is the o2 sensor heater. which the code has been blowing since the swap in feb....



the blue box in top right corner. the injector ground wires go to it.

I had 41 and 43 confused. Check all the wires at and leading to your o2. Possibly a broken solder or something simple.

Lastly, as I said before 92+ Integra and Civic's did not use resistor boxes, saturated injectors (high resistance) do not require the use of a resistor box. Peak and hold injectors do (low resistance) however. Pretty sure also that 97+ Prelude/Accords and the like did not use a resistor box either since their injectors were saturated.

I'm curious as hell where that resistor box came from, DSM maybe?

ive seen this box on every 96-00 civic that i been under the hood of. even EG's. my buddy has the one from an EG on his. which is grey 92-95.
and it is high resistance. when opened up cause it has a cap you can take off. it has one piece of metal going through with the four injector wires and the one from the harness connected to it. so pretty much they are all together. you have to have seen this before.

Dude, I'm telling you 92+ civic's and integras do not use resistor boxes. Find me a picture of this mysterious box mounted under the hood of a STOCK 92+ civic/integra.

ok. i will man. it might not be called a resistor box 92 and up. but this is there. like i said its a gray plug on 92-95. right on the right hand side. i pulled a prank on my cousin with his. i pulled the cap off. cause with out the cap the injectors wont work. he got up for work the next morning and his car wouldnt start. but i will get this picture to you. ill get one of a 92-95. and one of 96 up. on the car. like i said though it may be called something else 92 and up. all i know is that the injector ground wires go to it.

it may have a different name than a resistor box. but here is the obd-1 be side a obd-0 lower right
the obd-2 is whats on mine.

And that picture is off Hondata's website on how to wire in a resistor box into a car that does not have one stock. Again, cars that had them 90-95 Accord/Prelude's, 88-91 Civic's, 86-91 Integra's.

Here's the link to Hondata's article on how to wire low impedance (peak and hold) injectors into a car that STOCK has high impedance. http://www.hondata.com/techinjectorwiring.html I seriously don't know where you got the resistor box, but I know for a fact that 92+ Civic's, 92+ Integras, 96+ Accords and Preludes DID NOT HAVE A RESISTOR BOX. Maybe someone told you it was from one of the cars so you'd buy it... for whatever reason.

The grey plug in the lower right hand corner of that picture is simply a splice pack for the +12V that supplies the injectros as well as many other things such as the IACV, PCS, etc.

92+ Civics and Integras did not come with a resistor box from the factory.



How did you go about doing your OBD-1 conversion?

Did you use a conversion harness? Did you add a 4 wire oxygen sensor?

Code 41 is for the oxygen sensor heater circuit if memory serves me correctly. Check out this circuit to see if you are getting a ground and +12 volts when the key is on.

i guess i just built this thing in my basement right. thought it would give me more fuel or some shit like that. chose a blue color to stand out from the flat black engine bay. thats it.......im genuis.

Either way, I'm correct. I don't care where or how you "built" your car.

As for the code 41, check the heater circuitry and I bet you find a broken wire somewhere.

Good luck.

yes i have four wire o2. changed it twice. i have a complete obd-1 ls swap. dizzy and all. with obd-1 pr4 ecu. now i might be told that they dont make that kind of ecu. truthfully it could be something stupid with the wiring in the car. ive used this same ecu jumper for my ls vtec in my 91 teg. didnt have this problem. maybe there is a bad ground or something in it.

i never said you was wrong in the first place. and never said i was right. ive just seen these on these cars before. like i said it might not even be a resistor. it might have another name. but i have really seen these on 92-95 civics. i pulled that joke on my cousin with his. and it looks just like that one on that pic i posted on the right bottom. maybe its just certain models or years who knows. i just know what i pulled mine of off and hooked it up the same way it was.

Whoever told you there werent obd1 PR4's is an idiot. They came in 92-93 Integras.

As far as the "resistor", I guess you get one off custom Civics wherever you live.