2001 175 Ficht Error Code #51

[Mward4400]

2001
FICHT
175 hp

Here is the problem:

The last outing of the year last fall I was about 8 miles from the boat landing, once on plane I cranked up the motor to WOT, that's about 5600 rpm, I wanted to just run it hard the last time out for several minutes.

As I approached the landing I backed off on the throttle, when I did the motor killed and the "Check Engine" light came on, several attempts to restart were unsuccessfully

The next day I hooked up the laptop/OMC software and powered up the ignition, the check engine light still came on the dash gauge.

With the software running a "hard Fault of # 51 came up telling me that # 1 injector had a problem.

I touched # 1 injector and it was fairly warm to the touch, the others were cold.

While still under power I disconnected # 1 injector at the injector, I herd a distinct click as the connector was removed from the injector.

I shut off the power from the ignition reconnected the connector on # 1 injector and re powered with the ignition switch, when I rechecked faults on the software the fault had gone from a "Hard Fault" to an "intermittent fault" dash light out also.

I have not ran the motor since that day, however I believe that this problem will reoccur.

I sent the EMM to DFI technologies to be tested, It was returned with the note that no problems were found.

I was told by DFI that the injectors are powered all the time that to complete the circuit the EEM grounds the wire from the injector to "Fire" it.

There are two wires going to each injector, one is from a common power supply the other is to the EEM which grounds it each time the injector is called upon to fire.

If the injector has a mechanical bind and hangs open how does the EMM know that there is a fault there if the electrical part of it is working fine.

I have asked OMC/BRP tech's that "Under what kind of condition would the EMM hard fault an injector?" too much voltage? not enough voltage? a dead short? an open circuit ?

I was told by OMC/BRP that a dealer needs to look at it REAL close......... Give me a break!!

OMC/BRP was informed that I know almost as much if not more than the dealers do, and when pinned down he didn't know the answer of "Under what kind of condition would the EMM hard fault an injector?

It's either going to be in the EMM or Injector, New EMM is about $1900.00 used about $1200. Injector is $599.00 new and $250.00 rebuilt.

The EMM was tested by DFI and the problem could not be reproduced, but I am not comfortable with any answer yet.

Any help? or direction to head?

Thanks,

Mark
Eden Prairie, MN

[SEAHORSE]

IF the injector was warm and you heard a click when disconnecting it, there was either a short in the ground wire between the injector and the EMM or the EMM had an intermittent problem.

One injector fault will not stop a motor but if it is drawing too much current or staying on too long, the rest of the 40 volt system would suffer.

An open circuit gives an injector fault, a dead shorted one would blow a fuse.

[Mward4400]

Hi SEAHORSE,

I inspected the wire between the EMM and injector, however I can sure look again. The thing that bothers me is that the boat sat for almost 24 hours and still had the "Hard fault" in the injector or EMM even with the power off, I know that the EMM has power going to it all the time but either the injector was hung open or there was 40 volts on it all night.

Could it be a short to ground in the injector?

Right now if I follow the flow chart in the EMM and injector I am still leaning towards an EMM fault even though DFI found no problem.

I just hate these intermittent problems.

Mark