So first off I know I don't post on here, however I do read a lot of the threads and there is a lot of good info on here. However I'm having an issue with my chipped p28 Ecu. Every once in a while my car will throw a cel, although it will not let me read the code. I have tried jumping it and nothing. When the cel is on the car idles pretty high maybe around 1500, but I can turn it off remove the key and then turn it to 'on' and it will clear. After that I can turn the car on and it is fine. I'm thinking that the ecu might be going bad, but can't confirm it since it is not a daily thing. It just happens randomly, has anyone experience something like this?

*95 ej1 ls/vtec with b16 pistons and gsr head
Chipped p28 with pherable.net custom basemap.