Check engine light comes on & goes off

[JoeClark]

I have a 93 3000gt VR4 with 214,000 miles on her at the moment. As I am cursing at a speed of 55 the check engine light comes on and stay on for a while then as sudden as it came on it goes off still driving at 55 or less depens on traffic. My question is why is this happening? I took it to AMMCO to have the code check but they could not because the check engine light is not constantly. I do not have a code sxanner for the car to read the codes if any. The engine runs strong I tried to see if I could get the check engine light to come on but to no avail. Could it be a sensor going bad or the ECU I had trouble with it before and had the dealer replaced it. I'm here.
Please Help.
Thanks !
I didn't find the right solution from the internet.
References:
- http://www.automotiveforums.com/vbulletin/showthread.php?t=113839954156
- Device Explainer Video Examples

[Jit]

Hi Joe, have you checked the O2 sensor? I had similar problem with my Subaru. Hope this help.