So While tinkering under the hood of my 90 CRX Si I noticed a sensor that was not hooked up:


Does anybody know what this sensor is for? I would imagine it is not too good to have a sensor sitting there not sensing anything, so I'd kinda like to get it hooked up. I have a ZC swap By the way.

Next question: My check engine light is on. Now, I know there is a way to see what code it is throwing, but I dont know how to tell, to tell you the truth I dont even know where my ECU is (kiond of embarassing). I looked thru the FAQ to try and find how to get the codes but I couldnt find it anywhere so if someone would be so kind as to link me to the right page or just straight up explain it to me I would appreciate it.

Final Question: What is this part here:


The little cylinder thing with the white label on it needs replacing. I believe this has something to do with Idol control?

Thanks for looking guys, I'm sure someone will be able to help me out.

Cheers,
Sixy

 

That solenoid is for your EVAP canister. It won't affect how your car runs at all really, unless there is a vacuum leak involved in the lines going to and from it. Block off the port on the intake manifold going to it, and you're golden. (Then you can rip out the canister, that electrical taped vacuum hose, and all of the extra hoses that go with it.)

In the first picture, it looks like your O2 sensor isn't hooked up. Splice that white wire into the connector. Do you have a check engine light?!

 

Yah I have a check engine light. I dont know how to check what code its throwing though.

 

get in your passenger side door. pull up the carpet where your feet will be. there will be a little dime sized clear hole. turn the key on and watch the LED flash. bring back number of flashes for more help

 

OK thanks. Will do.

 

Yes it looks like the 02 sensor,, Ur rex should be running pretty rich with out that pluged up.. Smoke coming out of exhaust real dark?and in the second pic the deal to the right is a purge solenoid and to the left of that is the map sensor

 

I dont notice smoke too much. Just when I start the car and first start driving or if I rev the engine real high. I thought it was buring gas rather quickly though.

 

Yeah it was was the same with mine didnt smoke that much sitting after warming up but starting and when i got on it,, small tank tho just looks like ur burning alot, but with out that o2 sensor hooked up burning more than usual.