power loss misfire

mickmick Member Posts: 2

hi I run a 270 rinker 5. efi

 had an engine rebuild last year, engine runs sweet at dockside out side on the sea get to 3000 rpm wot. then back throttle off iac comes in pops and backfires and will not rev in or out of gear have to let it cool then limp back on tickover replaced map, iac, and thermo sensor ,scanned and no codes.cannot use in rough conditions for a fear of failure let it cool completely and it runs as if their is not a problem can use in marina in and out of gear fine no beeps no code faults.any ideas please regards .mike uk.

Post edited by mick on


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