We went out fishing today and I found Iwas losing power on the port engine. Boat is a 2002 Pursuit 3000with two 5.7 Captains |Choice, 400 hours. These engines have theeight bolt, two piece intake manifolds with high pressure pump, fuelrails and individual injectors for each hole.
Up to 2500 rpm both engines seem insinc and throttles stay aligned. As you move above that, the portengine needs more and more throttle to stay up with the starboardengine. It will run up to 3900 rpm but at that point the starboardengine is about half throttle and the port is close to wide open. Byitself, the port engine will only turn about 3100 rpm. So at thehigher rpm it looks that the right engine is pulling most of theload. And we had some 12 foot rollers out of the south so therereally was a load when we would climb them.
We ran for about 45 minutes at 3900 rpm(23 knots) this morning. I could not tell if the power loss was dueto a miss or fuel issues or what. It looked kind of weird with thethrottle settings so far apart. At fishing speed (1800 rpm, 7 knots)everything seemed normal and no difference was obvious between theengines. Running back at higher rpm, the same low power issue wasevident.
I want to do some troubleshootingtomorrow. Any suggestions as to the best approach will be welcome. I strikes me that fuel flow (filters) and fuel pressure are the placeto start...although it would be easier to pull plugs and look for adead cylinder due to ignition issues or a clogged injector. Or wouldit? As I say, all suggestions welcome.
Thanks!
CaboJohn
Up to 2500 rpm both engines seem insinc and throttles stay aligned. As you move above that, the portengine needs more and more throttle to stay up with the starboardengine. It will run up to 3900 rpm but at that point the starboardengine is about half throttle and the port is close to wide open. Byitself, the port engine will only turn about 3100 rpm. So at thehigher rpm it looks that the right engine is pulling most of theload. And we had some 12 foot rollers out of the south so therereally was a load when we would climb them.
We ran for about 45 minutes at 3900 rpm(23 knots) this morning. I could not tell if the power loss was dueto a miss or fuel issues or what. It looked kind of weird with thethrottle settings so far apart. At fishing speed (1800 rpm, 7 knots)everything seemed normal and no difference was obvious between theengines. Running back at higher rpm, the same low power issue wasevident.
I want to do some troubleshootingtomorrow. Any suggestions as to the best approach will be welcome. I strikes me that fuel flow (filters) and fuel pressure are the placeto start...although it would be easier to pull plugs and look for adead cylinder due to ignition issues or a clogged injector. Or wouldit? As I say, all suggestions welcome.
Thanks!
CaboJohn
