Getting on the highway tonight my car throws these two codes. The engine is out of a 1998 jdm ITR and the ECU is a 1998 spec JDM ITR ecu. IF I am reading the codes right and they are the same for this ECU as others, then this is a Primary o2 (cel1) and a TDC (cel8) code. Thing that sucks is no scanner tool will read the ecu nor will show me readouts of sensor voltage or info. Has anyone else had similar problems with their swaps? Reason I ask this is I don't want to have to spend the cash on new stuff unless I entirely need them. Also, a little earlier in the night as I was leaving my friends house I was going up a hill and gave the car gas and got no response for a couple moments then I had power all of a sudden like normal. This has happened on several occasions but I don't know if there is a correlation between the two incidents tonight but nonetheless it happened. Any help or insight would be appreciated.

Edit: I forgot to state that the distributor on the car is a brand new Si distributor that was on my b16.

 

I would try plugging the original ECU or any OBD2B D/B series USDM ECU to it (hella acronynmz, bro). Eliminate the jumper harness. Eliminate the foreign ECU.

Jumper harness wires can come loose. The JDM ECU should read thru any OBD2 scanner since OBD2 was a global thing. So either there's a wiring issue with the jumper harness to the OBD2 port, or that's not really an OBD2 ECU.

Plug in a known OBD2B USDM ECU into the original harness. See what happens.

No, using a different ECU won't hurt your engine.

 

Dump

 

Moar insight plz

 

Did you attempt any of the things suggested thus far?

 

Well, the problem is I can't just eliminate the JDM ecu yet as I haven't bypassed the CKF sensor. Doing so would cause it to idle/drive like utter **** I would imagine. An issue I foresaw at least I think I did was that the JDM ecu is double the size, like a p28 sized ecu compared to the OEM ECU. I had to flip it around so the wires fit behind the kick panel, and I thought there would be shorting or issues with the jumper. The other thing is I would have thought with those ecu codes it would have tossed it into limp mode, but it was driving and revving like normal. Last night it was cold and wet so I am curious if that had any bearing on this as well. Finally, it definately is a 98 JDM ITR ecu, numbers match and what not plus I doubt Hmotorsonline would send false parts to their customers, but I could be wrong.

And yea, my friend has a scanner, plus the one at his job didnt read anything as well either so I have no clue whats going on there, Unless it is the programming on them that is ****ed up

First thing I plan on doing is pulling the pannel off and inspecting the wiring and after that resetting the ecu to put some miles on it to see if the codes arise again.

 

Having no CKF doesn't make the car run any differently with a USDM ECU. It just sets a CEL. The CKF is jist there for misfire detection.

 

my 96 itr swap just now threw the CEL 8 and it bogs when you give it full throttle

 

Start a new thread, don't bump an old one please.