Volvo Penta engine problem

John41

So I need some input on what might be going on with my Volvo penta 5.7 engines. I have the 342 fiesta vee. Both engines are giving me a problem starting up. Sometimes I have to give it some throttle to get it started. A couple of times my starboard engine would just die . It happened while I was driving the boat and it happened a few times when I was idling. Yesterday when I started to head into my marina my port engine was losing power and the rpm’s were at 5,000. My starboard engine was at 3000. I wasn’t overheating. I changed my fuel/water separator and I still have the same problem. I replaced all my batteries last year but they seem to giving me a problem again with staying charged. Might be my charger but I don’t think that’s what causing the engines to die out while I’m driving. 

aero3113

The starting and stalling issue sounds like the IAC valves need to be replaced.

[Deleted User]

Good advice from aero3113 about the IAC. If that doesn't help you should look at the fuel pressure regulator, pre-2010 regulators have a filter that clogs and should be replaced with an "E-clip." The clogging is caused by paint that V-P in their wisdom applied to the INSIDE of the high and low pressure fuel pumps. Ethanol takes it off and dumps it into the fuel rather effectively. I've recommended him before, Troy at www.mancavemechanic.com is a priceless resource. His YouTube videos show how to cure all fuel woes with your V-P engine and he'll save you money. Good luck.

Andy

John41

What does IAC valve stand for? Lol... 

skennelly

Idle air control valve.

Aqua_Aura

Does Volvo use IAC valves? How is the condition of the fuel? 

[Deleted User]

Volvo-Penta uses IAC valves on their GM small block sourced engines. It's an AC-Delco part if I remember correctly, easy and cheap to find. Replacing mine solved a stalling problem.

Andy

[Deleted User]

Here's Troy's latest video on fuel injector removal and cleaning. 

https://youtu.be/xvx0RRkTfBo

Andy