Im not very familiar with ecu's. I have an obd2b ecu and i got the jumper harness to obd1. I got a p28 off a friend wit the same motor as me. He gave me a custom all motor chip and a universal mugen chip. I tested out both chips and i get the same problem. When i go full throttle or vtec the check engine light comes on. It goes away when i turn off and on the car. It just keeps coming back whenever the rpms get too high. Is this a normal problem?

Summary:
Obd2b -> obd1
p28 ecu
chipped /w custom all motor
also have mugen chip
[ Both chips get check engine light after higher rpms or full throttle ]

Your help and comments appreciated. Thank you in advance.

Additional info: ECU came off b16a2. Same motor as me. I/H/E on both cars. Except friends car has ctr cams. His is a coupe, mines a hatchback. Dont know if any of this is relevant. Does the basemap have anything to do with this?

 

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Hey bro, I have the same problem.