hey guys im having a minor annoying issue with my rex....its a dx mpfi, obd1....i was getting my codes taken care of which were 02 sensor and iat sensor...i got a 4 wire 02 sensor wired n a brand new iat sensor...my check engine light went away but when i'm driving the car for like 10 mins it comes back on...i check it n its iat sensor againg...i tried the sensor on my friends car and got no codes so it cant be the sensor....what do u guys think could be the issue? i'm using an obd1 jumper by the way...

 

https://honda-tech.com/zerothread/1869900

 

yea dats not exactly the issue i'm having....my code goes away n comes back....

 

bump

 

Seems like it intermittant. Check wiring/connectors from iat sensor to ecu. Also what type of connectors did you use if you had to cut any wiring?

 

you're sure you wired the four o2 wire's right this can cause mayhem if you didnt?

i would hard wire the iat directly to the ecu if you want an easy fix though..

 

the 4 wire 02 was wired into the obd0 to obd1 jumper....i asked my friend who did the mpfi swap about the wiring to the iat but he said he didnt have to cut into that, he just had to extend it....when the car was obd0 it didnt throw that code for iat.....do u guys sugest a new obd0 to obd1 jumper?

 

check resistance @ the jumper @ the iat pins.....

could be a loose pinfit too..

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BlueRex1020 &raquo;</TD></TR><TR><TD CLASS="quote">the 4 wire 02 was wired into the obd0 to obd1 jumper....i asked my friend who did the mpfi swap about the wiring to the iat but he said he didnt have to cut into that, he just had to extend it....when the car was obd0 it didnt throw that code for iat.....do u guys sugest a new obd0 to obd1 jumper?</TD></TR></TABLE>make sure that the correct connector is plugged into the IAT - we see a lot of DPFI swaps where the Tandem Control Valve connector (which isn't used on MPFI) is plugged into the IAT - the IAT should plug right in and doesn't need to have the wires extended - sounds to me like whoever did the wiring doesn't know what they are doing - probably has O2 wired wrong also - the IAT has a 2-wire connector with a red/yellow and green/white wires - the Tandem Control Valve also has a 2-wire connector with orange and black/yellow wires - it shouldn't be connected to anything

 

ill check this out tomorrow n let u guys know...but if the iat wasnt plugged in right like u say, wouldnt the car throw the code all the time?

 

so i had my buddy and someone else take a look at my engine harness n the wiring for the iat was correct....i'm runing out of options guys i dont know what else to check to make the code go away.....should i replace the obd0 to obd1 jumper with a new one from rywire? could that be my problem? cus when my car was obd0 it didnt throw that code...

 

bump..