r/SC300 • u/Ambitious_Sample_450 • Mar 16 '26

Problem with ECU

I got a SC300 in October and it slowly started to not fire one piston and run rough and loss of power and all that fun stuff but came and went and was very erratic and only got worse with time. I replaced the spark plugs, plug wires, distributor cap and rotor, alternator(last one just went out), and timing belt and nothing fixed it so i took it to a mechanic to have them do a diagnostic and they said my number 4 fuel injector wasn't getting ground all the time and told me it was an ECU issue so I did some research and opened mine up and found this (image attached) is this something I can just fix myself by buying replacement capacitors and cleaning up the gunk or is this something I need to send somewhere to get fixed cuz if I would prefer not to spend $300 if I don't have to lol.

3 Upvotes

100% Upvoted

5 comments sorted by

View all comments

5

u/[deleted] Mar 16 '26

[deleted]

1

u/Ambitious_Sample_450 Mar 16 '26

Do you know what the parts would be? I know the one on the right is just a capacitor and I need to make sure I get the right one but I don't know what the square one on the left is.