CODES
Pin #8 flashed 8 times. => Idle Speed Control [ISC]
Pin #14 flashed 14 times. => Closed Throttle Position Contact Switch

A number of different dysfunctional items can cause these codes. I'm not the "best" diagnostician, so it's better to have someone else on this list and / or an inde shop help you with specifics. You used an appropriate title for this thread, so much more knowledgeable people than me will contribute and help you.

I assume your wagon has ASR, but you should check and post that info.

How does the engine wiring harness insulation look? This is important to know...

What's the condition [OEM vs replaced] of ALL the vacuum hoses & tubes?

What other performance [engine, transmission & electrical] items have been repaired or replaced?