I am running a 97 integra type r engine in a 89 CRX with a full 95 civic ex body & engine harness. I am currently getting code 10 which is the IAT sensor. I checked the sensor and it was burned, so I went to the junkyard and got one from a 94 honda civic coupe single cam engine. I installed it and still got the code, then I took the sensor out again to check and the tip was burned up. Why is this happening?

 

Can V-tec still engage with the IAT sensor not working properly?

 

The car will run fine without a lot of sensors plugged in. This is intentional since sensors (like anything else) have a finite service life. If the sensor dies, the car still needs to be drivable for a short period of time.

O2 sensors, MAP sensor, IAT sensor, etc.....they will all trigger a limp-home condition but the car will still run (albeit poorly). so no vtec

 

Dam I just don't understand why that sensor got burned up. It was fine when I first put it in.

 

Are you backfiring through the IM? ( I assume you mean physically burned, not electronically.)

 

Check for the IAT sensor wire color codes. For 92 and up I believe it is red/green/yellow. If you plug the wrong plug on the IAT sensor, then it will fry up your IAT.

 

You're getting a backfire into the intake manifold.

 

If the tip of the IAT sensor looks melted, you have the charcoal purge solenoid plugged into your IAT sensor and vice versa.


-Bob

 

ill bet the ECU is burnt too...

 

Actually your right today I reversed the plugs and it worked fine also Vtec is poping already!!!!!! but still got a check light....

I got to get a new IAT sensor tho.....

 

No the ECU is not burned.....

 

switching those connectors results in the part that powers the EVAP purge in the ECU to blowup.
Having this part gone does not set a CEL, nor does it run the car any differently. You will simply not have EVAP functionality. Not a huge deal for some of us.
A quick smell of the ECU will tell you if this part is damaged.

 

and if it is, cut that smelly SOB off the board lol. should be Q31 aka the burnt lookin one.

 

Well I took a wiff of the ecu and it was fine, but that po6 is my Guinea pig, so I don't care if I fry it. I have my chipped p28 chilling there till I get everything sorted out.

 

I have same problem, the IAT is burned, it melted plastic bits. unfortunately the ecu is also fried. the cause. I accident switched the iacv and iat switch around. there are 5 switch that look exactly the same.(IAT, ICAV, PS, IAB,"only b18c5" evap, knock sensor) you should sort it out with the wire color. good luck!


98-01 integra
c134 IAB red/blue - blk
c117 evap yel/blk - red/yel
c120 IAT grn/black - red/yellow
c311 p/s switch - green - black
c116 iacv black/blue - yellow/black
c133 knock sensor - red/blue - blank