Gollum Posted August 19, 2012 Share Posted August 19, 2012 Nice . I just bought an extra ecu from a member here . I'm thinking of putting a safety fuse on the FI relay that powers the ecu. What voltage fuse should I run ? First, Fuses are rated in AMPS, not VOLTS. Very different. It's like the difference between frequency versus volume of a sound. I'd say the ECU shouldn't pull more than 5 amps. I'd start there then if it blows consider going up toe 10 amps if there didn't seem to be any good reason why it blew and it otherwise had been running fine. If it blows right away you might have some grounding issues, if the engine did something weird then it blew you might have wiring issues. If it just randomly popped after some time then you might need a few extra amps. Under fusing and having to go up is much safer than over fusing then having an issue that the fuse doesn't blow for. Quote Link to comment Share on other sites More sharing options...
S30Turbo Posted August 20, 2012 Author Share Posted August 20, 2012 here are pictures of my engine bay. Quote Link to comment Share on other sites More sharing options...
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