Check engine light comes on & goes off

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 :banghead: here. Help! Thank you in advance.

Did you ever figure this issue out? Probably something electrical.
I can take a look if you still need help.

edit: I just saw the other thread so I guess you got it.

No the car won't run. It died on me just before I was to head to florida. I think It's a sensor either the crank sensor or the cam position sensor. it's almost apart now just need to get the flywheel off so I can remove the timing belt cover plate. it's cold out there now.