Anybody here familiar with MERCRUISER MPI?

[THEFERMANATOR]

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

http://www.thehulltruth.com/forums/thread-view.asp?tid=136500&posts=2#M1405274

[THEFERMANATOR]

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

http://www.thehulltruth.com/forums/thread-view.asp?tid=136500&posts=2#M1405274

[Skools Out]

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

[Skools Out]

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

[THEFERMANATOR]

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.

[THEFERMANATOR]

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.

[THEFERMANATOR]

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!!!!

[THEFERMANATOR]

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!!!!

[msbhammer]

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

[msbhammer]

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

[THEFERMANATOR]

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.

[THEFERMANATOR]

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.

[macojoe]

Let us know how you make out!!

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

[macojoe]

Let us know how you make out!!

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

[THEFERMANATOR]

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

[THEFERMANATOR]

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

[macojoe]

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

[macojoe]

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

[THEFERMANATOR]

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

[THEFERMANATOR]

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