Hello I'm having issues with my 1994 Toyota 4Runner, 186k miles, A/T, RWD. Has a junkyard transmission that shifts well! I had a Garage install it recently. I can hear rattling when I decelerate what's going on?

So I did some digging and found that 14 means Ignition Signal Fault and 71 means EGR Fault? I'm thinking I should clean the EGR Valve? What about Code 14? Any suggestions?

Also the O/D light blinks steady. What should I check for? How can I attempt these repairs? I have the Haines Repair Manual.

Lights Blinking: 

https://photos.app.goo.gl/NDvogVxKLo5k41rz6

Rattling: https://photos.app.goo.gl/Kq3MVGGtq8gWE6YGA

1994 4Runner, Codes: 14 & 71. O/D Flashes on and Off

Hello I'm having issues with my 1994 Toyota 4Runner, 186k miles, A/T, RWD. Has a junkyard transmission that shifts well! I had a Garage install it recently. I can hear rattling when I decelerate what's going on?

So I did some digging and found that 14 means Ignition Signal Fault and 71 means EGR Fault? I'm thinking I should clean the EGR Valve? What about Code 14? Any suggestions?

Also the O/D light blinks steady. What should I check for? How can I attempt these repairs? I have the Haines Repair Manual.

[Lights Blinking]( https://photos.app.goo.gl/NDvogVxKLo5k41rz6)

[Rattling Noise When Decelerating]( https://photos.app.goo.gl/Kq3MVGGtq8gWE6YGA)