Everytime I run my car the CEL comes on after about 5-10 minutes. I have no idea what could have caused this.lol When I jump my harness I don't get a code on the CEL and there is no visible light on the ECU itself.. Anyone have any helpful suggestions? Any help is much appreciated, Kyle I may actually paypal someone some money if you can figure this out!

 

what kind of car is it, and have you run any leaded race fuel through it recently?

 

yes need moar details on the car

 

well running race fuel probably wouldn't tell me why my CEL is on but I can't get a code off my ECU...lol It is a 91 integra GS B18A1 OBD0. Update: If I pull my oxygen sensor and reset my ECU I never get the CEL to come on. Plug the O2 sensor in and bam, CEL. Yet I can't get a code off my ECU......

 

TTT

 

TTT

 

Check/Test coolant temp sensor (in head, under distributor?) when cold and hot (with CEL). Same for O2.

*O2 is one wire, correct? Do you know if that is a heated sensor? If not, maybe that is why you can't pull code. Error is intermittent once it reaches (or fails to reach) temperature. What does the sensor look like when you pull it out (pic?)?

Pull code with vehicle running.

 

Did your problem get solved? I have seen many problems like this.

 

Not even close to fixed... I haven't got any suggestions or help whatsoever from anyone about this. Everyone I tell draws a blank. Doesn't anyone even klnow for sure where the code will be shown on a 91 integra GS OBD0 car? will the code flash on the CEL itself, the ECU(where on the ECU?). Also, why isn't my car running the CEL after I unplug the O2 sensor? I have been driving around for 2 days without the sensor and no CEL, car seems to run flawlessly..

 

I won a sheet in a motocross race with like 5 Walsh's service center free oil changes and check engine light diagnosis.lol I'm taking the teg in at 2:30 and going to see if they can figure it out!!!