2014 3.0 mpi want go over 2500 rpm’s we have Cleaned all injectors replaced distributor and idles fine just will not go over 2500 like it’s on a rev.

Mike2121

Cadet
Joined
Jun 29, 2022
Messages
6
2014 3.0 mpi want go over 2500 rpm’s we have Cleaned all injectors replaced distributor and idles fine just will not go over 2500 like it’s on a rev
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Are you testing on the water (driving along) or on flushers (in neutral)?
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
43,175
Need more info, what's the serial number?
Is this a new to you boat?
If it is what pitch prop does it have?
 

Mike2121

Cadet
Joined
Jun 29, 2022
Messages
6
Need more info, what's the serial number?
Is this a new to you boat?
If it is what pitch prop does it have?
This is a new to me boat. The problem is definitely due to limp mode but we have checked everything. The laptop is showing no codes
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
43,175
Laptop, so I'll assume using Diacom software. Its not in limp mode because the would show up.

Did the boat ever run better?
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
Does the laptop show that the engine is in gear?
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
The ECUs are connected to an 'in-gear' switch, and if the engine isn't in gear, the ecu will limit the engine speed, to around 2,500/3,000rpm... So you need to check that in the software, make sure the ECU is seeing that switch.

Chris...
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
43,175
Being it never run good the drive or prop may have been swapped out with one with to much pitch or higher ratio
 

achris

More fish than mountain goat
Joined
May 19, 2004
Messages
27,468
2014 3.0 mpi want go over 2500 rpm’s we have Cleaned all injectors replaced distributor and idles fine just will not go over 2500 like it’s on a rev
Being it never run good the drive or prop may have been swapped out with one with to much pitch or higher ratio
Mike, can you give us the engine and drive serial number, and the pitch of the prop? Also a bit of a description of the boat (length, weight ect.) With that info we could start digging into this.

Chris....
 

Mike2121

Cadet
Joined
Jun 29, 2022
Messages
6
The ECUs are connected to an 'in-gear' switch, and if the engine isn't in gear, the ecu will limit the engine speed, to around 2,500/3,000rpm... So you need to check that in the software, make sure the ECU is seeing that switch.

Chris...
There are two switches on top is that one of them.
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
43,175
yes
Disconnect the in-gear switch and see if it stops
Gear and Shift Switches.jpg
 

alldodge

Moderator
Staff member
Joined
Mar 8, 2009
Messages
43,175
Use the Diacom and record as the motor runs, then post it
 

Scott Danforth

Grumpy Vintage Moderator still playing with boats
Staff member
Joined
Jul 23, 2011
Messages
51,141
Fair play. Just thought these were an exception to the usual mpi rule. Never seen one in person. Seem to buck the trend and don’t have anymore power
Because EFI doesn't add power.
 

QBhoy

Fleet Admiral
Joined
Mar 10, 2016
Messages
8,348
Because EFI doesn't add power.
Haha. I’m not biting again on this. But was just referring to the general rule on mpi motors generally having more power over the carb from factory fitted installations of the same era. That’s all. I get your point though.
 
Top