because it wont blow your ecu, where as with other cars you will fry PCM's or the ECM ect. very common on magna and delco, bosh systems to burn out a ecu from voltage spike.
when you turn on the head lights before you remove the jumper leads the altenator of the flat car wont spike as much as the load is higher. maybe its an old myth but I havnt fired a honda ecu in 13 years of doing that way.
if it was my car that was the donor car, I wouldnt have my engine running. doesnt hurt to let them crank their car while yours isnt running. just dont let them crank forever.
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Originally Posted by Yasakani
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