Did 100 miles on the boat last week and it threw a fault code and starting running rough just as i was putting it back on the trailer.
The motor is a 2007 DF140 with 180 hours on it.
Dash shows code 3-2. (MAP pressure not as expected.)
Found the IAC valve was a dead short, borrowed a known good one from a friend. - Wont start.
I can sometimes get it to start by removing the IAC and controlling the air using my finger! but when its running it doesn't sound right. Almost like a missfire.
If the engine stops it wont re-start.
Compression tested - all 4 cylinders at 170.
Low pressure fuel pump tested. - ok
High pressure pump removed and stripped, no sign of any dirt anyway. Fuel pressure tested at 37 psi as per spec.
All fuel filters changed.
I have a SDS lead and software.
all readings check out. Nothing out of the ordinary. The MAP sensor is reading fine, i think the failed IAC caused the alarm code.
If i manually activate the IAC valve it just buzzes, i dont see the vale open. Is this normal? I'm wondering it the ECU may have been damaged by my old IAC which went dead short?
All 4 plugs are very black and carbonized, and wet with fuel.
Any ideas clever people?![Confused](https://www.suzukioutboardforum.com/core/images/smilies/confused.png)
I have a sponsored boat run next week in aid of Cancer Care Charity, and things don't look good.![Frown](https://www.suzukioutboardforum.com/core/images/smilies/frown.png)
Thank you.
The motor is a 2007 DF140 with 180 hours on it.
Dash shows code 3-2. (MAP pressure not as expected.)
Found the IAC valve was a dead short, borrowed a known good one from a friend. - Wont start.
I can sometimes get it to start by removing the IAC and controlling the air using my finger! but when its running it doesn't sound right. Almost like a missfire.
If the engine stops it wont re-start.
Compression tested - all 4 cylinders at 170.
Low pressure fuel pump tested. - ok
High pressure pump removed and stripped, no sign of any dirt anyway. Fuel pressure tested at 37 psi as per spec.
All fuel filters changed.
I have a SDS lead and software.
all readings check out. Nothing out of the ordinary. The MAP sensor is reading fine, i think the failed IAC caused the alarm code.
If i manually activate the IAC valve it just buzzes, i dont see the vale open. Is this normal? I'm wondering it the ECU may have been damaged by my old IAC which went dead short?
All 4 plugs are very black and carbonized, and wet with fuel.
Any ideas clever people?
![Confused](https://www.suzukioutboardforum.com/core/images/smilies/confused.png)
I have a sponsored boat run next week in aid of Cancer Care Charity, and things don't look good.
![Frown](https://www.suzukioutboardforum.com/core/images/smilies/frown.png)
Thank you.
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