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4.3 EFI fault codes 42 and 43

BoatService

New member
Hi.
My boat runs fine up to 2950 rpm. When I reach 3000 it cuts off instantly, as if you turned the key off. Engine restarts no problem and runs fine until 3000, when it cuts off again. This happened 4 times on the same outing, Limped home with lower revs. Attached a TechMate pro and got fault codes 42 (electric spark timing fault) and 43 (electric spark control fault). Fuel tank, hoses and filters all good. Where do I go from here?
Max
 
it would help us out if you ID the engine a bit better...

A code 42 could be a simple an the ignition module has failed or it could be a wiring problem...best bet is to get the correct OEM manual and follow the procedure within.
 
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