Mercruiser 7.4L MIE EFI quits

jtruth

Recruit
Joined
Jun 24, 2011
Messages
3
Problems with engine quitting. Has new cap, rotor, plug wires, plugs, impeller, heat exchanger cleaned, all new filters. Engine quit dead. Scanner codes said high pressure pump and MAP. Cleared codes, and only high pressure pump came back. Replaced pump and engine ran about an hour and just quit. Scanned again code said bad MAP, replaced MAP and engine ran 20 minutes and just died. I tried to start and engine lit and immediately quit. After 3 or 4 tries engine would not start at all however engine still cranks good. Anyone out there with any ideas??????
 
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jtruth

Recruit
Joined
Jun 24, 2011
Messages
3
Re: Mercruiser 7.4L MIE EFI quits

The Quicksilver-Mercruiser engine diagnostic tool that reads the on board computer failure codes.
 

Bondo

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Staff member
Joined
Apr 17, 2002
Messages
70,994
Re: Mercruiser 7.4L MIE EFI quits

The Quicksilver-Mercruiser engine diagnostic tool that reads the on board computer failure codes.

Ayuh,... Even 'puter controlled motors are diagnosed like any other motor...

It takes Fuel, Fire, 'n Compression, All at the Right Time...

Yer missing 1 of the 4...
 
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