Anybody here familiar with MERCRUISER MPI?
 

If anybody here is familiar with late model MERCRUISER MPI/EFI, please check out my post over on THT.

http://www.thehulltruth.com/forums/t...sts=2#M1405274

Anybody here familiar with MERCRUISER MPI?
 

If anybody here is familiar with late model MERCRUISER MPI/EFI, please check out my post over on THT.

http://www.thehulltruth.com/forums/t...sts=2#M1405274

Re: Anybody here familiar with MERCRUISER MPI?
 

is it computer controled? if so you have a temp sensor bad some where or a temp sensor wire burning to ground some where when it warms up

Re: Anybody here familiar with MERCRUISER MPI?
 

is it computer controled? if so you have a temp sensor bad some where or a temp sensor wire burning to ground some where when it warms up

Re: Anybody here familiar with MERCRUISER MPI?
 

It's definately computer controlled, MERCRUISER PCM 555. It acts to me like a CTS that is out of range because it is lean all the time. But when it goes into warm engine mode and lean out for normal running it stalls. But I thought the fuel pressure was supposed to be around 45-48 on the MPI, I'm only getting 36. This would lean it out as well, but I don't have a book yet to get the specs.


ON EDIT: I just went up and restarted it after it had sat for about 2 hours, run perfect ???. Now to try and figure out the warm engine and warning light.

Re: Anybody here familiar with MERCRUISER MPI?
 

It's definately computer controlled, MERCRUISER PCM 555. It acts to me like a CTS that is out of range because it is lean all the time. But when it goes into warm engine mode and lean out for normal running it stalls. But I thought the fuel pressure was supposed to be around 45-48 on the MPI, I'm only getting 36. This would lean it out as well, but I don't have a book yet to get the specs.


ON EDIT: I just went up and restarted it after it had sat for about 2 hours, run perfect ???. Now to try and figure out the warm engine and warning light.

Re: Anybody here familiar with MERCRUISER MPI?
 

Took it in and had it scanned, came back as a MAP sensor fault. $101.65 to have it scanned and another $216.05 + tax for the sensor :o. OUCH!!!!

Re: Anybody here familiar with MERCRUISER MPI?
 

Took it in and had it scanned, came back as a MAP sensor fault. $101.65 to have it scanned and another $216.05 + tax for the sensor :o. OUCH!!!!

Re: Anybody here familiar with MERCRUISER MPI?
 

Glad you gotter fixed up right, but I;m here looking for Randleman and his V pics. >:( >:( >:( :o :o :P

Re: Anybody here familiar with MERCRUISER MPI?
 

Glad you gotter fixed up right, but I;m here looking for Randleman and his V pics. >:( >:( >:( :o :o :P

Re: Anybody here familiar with MERCRUISER MPI?
 

Well I'll find out WEDNSEDAY if this fix's it or not. Nobody keeps the MAP in stock so it has to come out of MERCURY corporate.

Re: Anybody here familiar with MERCRUISER MPI?
 

Well I'll find out WEDNSEDAY if this fix's it or not. Nobody keeps the MAP in stock so it has to come out of MERCURY corporate.

Re: Anybody here familiar with MERCRUISER MPI?
 

Let us know how you make out!!

I am blocking hammer for the rest of the night for posting to many useless posts!! ;)

Re: Anybody here familiar with MERCRUISER MPI?
 

Let us know how you make out!!

I am blocking hammer for the rest of the night for posting to many useless posts!! ;)

Re: Anybody here familiar with MERCRUISER MPI?
 

MAP sensor fixed it, runs great. But now I have to fix an overheat problem.

Re: Anybody here familiar with MERCRUISER MPI?
 

MAP sensor fixed it, runs great. But now I have to fix an overheat problem.

Re: Anybody here familiar with MERCRUISER MPI?
 

Whats with all the over heating problems?? Seems like we all have seen this latley??

Re: Anybody here familiar with MERCRUISER MPI?
 

Whats with all the over heating problems?? Seems like we all have seen this latley??

Re: Anybody here familiar with MERCRUISER MPI?
 

I think LISA put a hex on all of us for HAMMER's GOOD MORNING desktop.

Re: Anybody here familiar with MERCRUISER MPI?
 

I think LISA put a hex on all of us for HAMMER's GOOD MORNING desktop.