Hi my name is darrell and I'm having a problem with my 93 honda accord the code says 7 and 8 which is throttle angle and tdc position I don't know what that mean can anyone help me please thank you. I did the test because the D4 light keep blinking and I loose power

The TDC Sensor inside the distributor is bad. You need to replace the distributor housing (genuine Honda only), since the sensor is not repairable:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-4.html#post288473

Over 50% of new aftermarket distributors have not worked, at AMHD.

It's okay to install your existing Ignition Control Module (ICM) and coil, or to install new aftermarket components, in the new distributor housing to save money:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-selected-other-vehicles-46563-4.html#post265896