I am done with my turbo project except for down pipe and SAFC 2. I was reading and i see that everyone solders there wires together when installing a SAFC or VAFC. Why? do you have to? i dont have a solder and i know i cant drive my car to have it done because i dont have propper fuel management if its not in. I know im going to be told to "go buy one" but im seriously out of money for two weeks and i dont want to wait when im this far

 

It's a better way, but you don't have to. I didn't.
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The "why" part of that is because the solder holds the spliced wires together securely so they don't split apart when the harness is moved around.

Just a security measure so that you don't disconenct and short out your ECU or AFC.

 

I tried to but my iron stopped working the night I went to do it, so I just ended up clamping and splicing. It has held up so far...