5.7 Mercruiser EFI, idle after warmup quits engine

thumpar

Admiral
Joined
Jun 21, 2007
Messages
6,138
I can hear the hissing. It sure sounds like an IAC issue. Have you cleaned the TB?
 

skippy2235

Petty Officer 2nd Class
Joined
Aug 24, 2009
Messages
138
Mine did the same thing. Computer was bad, Was running lean and causing the surge. Computer needs to be re-programed.
I ended up putting in a DIY megasquirt computer. Runs Awesome now.
 

Altoboat

Recruit
Joined
Jul 10, 2012
Messages
2
Hi everyone. Sorry for resurrecting this thread, but I'm having similar issues with my Mercruiser 5.7L EFI (1999) TBI. I mean its identical. Has this been resolved? Do we have any ideas what is causing this?
 
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