VP 5.7 EFI Start problem - low idle

[winbasic]

Hi,
I've got a 2003 VP engine (SN 4012077084) which is having a starting issue. When I turn the ignition to On, I wait until I hear the fuel pump prime and then an alarm beep sounds which I'm assuming means it's ready to start. I wait a few seconds and then attempt to start the engine but it just winds over. Sometimes when I do this, you hear a cough but it won't start. If I push the throttle forward a little and then attempt to start, it starts with no problems. No delay, no coughing. I'd say it was a low idle problem but the thing is when it's started and I push the throttle back to idle, it'll happily idle - no rough idling and no cut outs.

I'm not sure if it's a related problem but the engine seems to take about 10 to 15 minutes of running before I can get to cruising speed without it sounding like it's missing. Plugs aren't that old and are clean - several tanks of fuel have been put through it and the fuel is fresh so I'm not sure where to look from here. I've searched through the forums here but I can't find anything on EFI engines related to this.

Kind Regards,

David.

 

[maxxman04]

Re: VP 5.7 EFI Start problem - low idle

i would check the fuel filter(s) and water seperator. or just replace them anyway, as they don't cost much.

 

[winbasic]

Re: VP 5.7 EFI Start problem - low idle

Maybe I'm missing something but I can only find a fuel filter on the boat - I can't find a fuel/water separator. When I enquired I was told that this model of engine doesn't have the fuel/water separator built into the filter and that later models did. Does this sound right?

 

[Don S]

Re: VP 5.7 EFI Start problem - low idle

The filter installed on the engine under the pumps IS a water seperating fuel filter. Small, but it is.
Most installers install a primary water seperating fuel filter with the filters that are the size of an oil filter. This keeps the chance of getting water to the EFI system to a minimum.
In case you haven't got them, here are links to the OEM manuals for your engine and drive.


Engine manual = http://www.4shared.com/account/file/74506321/9da18d5d/7743372_Engine_Manual_50-57.html

EFI Diagnostics = http://www.4shared.com/account/file/74506321/9da18d5d/7743372_Engine_Manual_50-57.html
Corroections to this manual = http://www.4shared.com/account/file/83596358/baabed6d/7742218_Manual_Corrections.html

Outdrive Manual = http://www.4shared.com/file/50982625/e2bdb42c/SX_DP-S_Service_Manual.html

You can also go to the link below and download the maintenance schedule and owners manual.
http://www.volvo.com/volvopenta/glo...ice/publication_search/publication_search.htm
After all that, now let them tell you that you don't have a water seperating fuel filter.

 

[winbasic]

Re: VP 5.7 EFI Start problem - low idle

Thanks Don - I've got most of those manuals from you previously and the info on the fuel filter is invaluable! Back to the shop I go. Now I'll change the filter anyway but does the original problem sound filter related or should I be grabbing something else whilst at the Volvo Penta shop?

Being EFI, is this something that if I plugged a diagnostics tool into the computer, I would find out the results?

 

[epic mariner]

Re: VP 5.7 EFI Start problem - low idle

Don S, first, thanks for those links. When I click on the "download now" button, all I get is a screen saying "Oops, this link appears to be broken" for both the Diagnostic Manual and the Corrections. Any ideas? I would very much appreciate downloading those files. Thanks.