Mercruiser mpi 5.0 alpha cutting out

[hughesy1]

Hi guys got a 5.0 alpha mpi ecm555 it’s cutting out when I throttle back fast or from high rpm after planing and coming off I have replaced the iac it’s just had a new ecm any ideas from
them at me

 

[achris]

Put the diagnostics software on it.

 

[Rick Stephens]

Don't replace parts until you read the codes.

 

[alldodge]

Hi guys got a 5.0 alpha mpi ecm555 it’s cutting out when I throttle back fast or from high rpm after planing and coming off I have replaced the iac it’s just had a new ecm any ideas from
them at me

Did you work out which ECM you have as posted in the other post?

Coming back quick should be compensated by the IAC. Suggest removing the IAC and see if it needs to be cleaned

 

[hughesy1]

I have replaced the iac had an old one tried it didn’t work brought a new one and it hasn’t solved it got no faults showing up on vessel view

 

[alldodge]

I have replaced the iac had an old one tried it didn’t work brought a new one and it hasn’t solved it got no faults showing up on vessel view

What's your serial number?

What is the fuel pressure when throttling down?
How does it throttle up, good and strong?
Plug color ?

 

[QBhoy]

Is it ok if I suggest my usual war cry about the mpi and this kind of issue ?? Please tell me it’s ok

 

[achris]

Is it ok if I suggest my usual war cry about the mpi and this kind of issue ?? Please tell me it’s ok

:facepalm:

 

[QBhoy]

:facepalm:

Chris. Think you’ve been maybe made a little wiser to this recently, after the last time it turned out to be the case. 3 times in the one week if I remember correctly and from 3 different posts . Or are you just choosing to ignore all these diz cap fails. I could screenshot you a list of nearly a 1000 hits of it on the internet !