Welcome to 2CarPros.
The flashing engine light indicates a cylinder misfire. Have you scanned the computer for diagnostic trouble codes? Also, the idle issue could be related to a few things. We need to pull codes to see what is happening. Here is a quick video showing how it is done:
https://youtu.be/YV3TRZwer8k
I realize most people don't own a scanner, but most parts stores will do it for free or lend/rent you a scanner.
As far as the relays, I attached a picture of the fuse/relay box in the vehicle. Does that look like the one you have? Also, the relays should just pull straight out.
Let me know.
Joe
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Friday, October 11th, 2019 AT 5:46 PM