Mercruiser ECM replacement?

[Ferrarakias]

12 is ECM checks good
21 is TPS voltage high, so signal lead shorted to power
42 is IC grounded and or bypass open to ground

alldodge,
So is there a problem with both the Throttle Position Sensor and the Idle Air Control valve?
Regards

 

[alldodge]

If you find the screen is clogged just toss it. No need for a screen that has larger holes then the filter

If you have a compressor and hand adjustable Reg. Use rubber tip and connect to base of cool fuel Reg. Adjust air pressure up slowly and it should open at 30 psi

 

[alldodge]

alldodge,
So is there a problem with both the Throttle Position Sensor and the Idle Air Control valve?
Regards

With those codes, it says the tps voltage is to high, so there may be an issue with it or supply voltage is getting to signal wire

The other deals with the dizzy module

 

[Ferrarakias]

Some how I didn't get notified of the post Thursday

Pumps good but can't say the same for the Reg. The pump should be capable of producing 60 psi and with the gauge going to 55 it does.

The Reg should keep fuel pressure at 30 which its not doing that. It does bleed down, but it should never get above 30 in the first place. Remove the Reg and see if the screen under it is clogged

alldodge,
Attached a gauge to measure fuel pressure while engine was running.
Please check the attached video...
Already ordered a new fuel pressure regulator (by the way the one found in the fuel cooler is made in Japan by kei hin).
It is the proper thing to do, right?
Kostas

 

[alldodge]

No vid

 

[Ferrarakias]

No vid

Fixed!

 

[alldodge]

The Reg is shot for sure, jumping between 2.8 and 4.4 Bar (40 to 65 psi)

 

[Ferrarakias]

The Reg is shot for sure, jumping between 2.8 and 4.4 Bar (40 to 65 psi)

alldodge,
Regulator replaced, pressure now steady at 30psi...
Just like you said it would be.
Next task: test ride!

 

[ROY WILLIAMS]

alldodge,
Regulator replaced, pressure now steady at 30psi...
Just like you said it would be.
Next task: test ride!

replaced the gas reg and the pressure is correct and the needle is stable ...
now run it the water and test the gasoline pressure !

 

[Ferrarakias]

Well thanks to all of you and especially alldodge problem is solved!

Boat idles great and accelerates super fast!

I really can't thank you enough, appreciate all your help and knowledge.

Regards,
Kostas