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Aem ems 4

EFI Tuning Fundamentals

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Any recommendations for getting cold start better on Subaru equipped with an Aem Ems 4 standalone ecu. I find mine is taking too long to start?

Hello Shakiel,

it’s difficult to suggest anything to help

without any data really, are you able

to attach your calibration

file and a log of it cranking or screenshots?

it could be a number of things from ignition and injection timing to poorly calibrated cranking enrichment etc. are you using the cam sensor input for sequential control?

We usually reply within 12hrs (often sooner)

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