Ok, so I have read all I can here and have started to tear my hair out in frustration 
I have a new to me 2005 Regal 2860 with twin VP 4.3 GXi-E sterndrives. Everything checked out on survey but since the boat arrived in Australia we have not been able to achieve WOT on either engine, particularly starboard. Port runs Ok and I suspect cant get to WOT due to starboard lagging behind. 'We have achieved about 21 knots and on the plane but this boat should cruise at around 26-28 and run well above 30kts at WOT.
Starboard misses slightly but otherwise starts and idles fine. We've had a VP tech check her out but so far no success. Things we've done:
All without success. The engine misfires a little (not badly) and starts easily. Oil pressure is fine, as are cylinder compressions. The starboard tach was replaced after found to be faulty during survey but now reads incorrectly (high). Weve checked the settings and it is set correctly, so have been syncing it with port which is reading correctly as determined by our technician. WOT on starboard is estimated at about 2500 to 3000 max (if we take the reading when synced with port). One other thing to note, but possibly unrelated, is that starboard never seems to reach operating temperature; it creeps up the gauge to maybe 160 but doesn't get higher and doesn't match port which reads as it should (don't have the exact temp reading with me, but its normal). The tech has connected the engine to his diagnostic computer and all is showing normal.
We're now sick of replacing parts with no return. Any ideas where we should look now? This is getting very frustrating! Thanks.
I have a new to me 2005 Regal 2860 with twin VP 4.3 GXi-E sterndrives. Everything checked out on survey but since the boat arrived in Australia we have not been able to achieve WOT on either engine, particularly starboard. Port runs Ok and I suspect cant get to WOT due to starboard lagging behind. 'We have achieved about 21 knots and on the plane but this boat should cruise at around 26-28 and run well above 30kts at WOT. Starboard misses slightly but otherwise starts and idles fine. We've had a VP tech check her out but so far no success. Things we've done:
- Removed, checked and cleaned injectors
- Checked fuel pump. Pressures OK
- Checked anti syphon valve . All OK
- Replaced fuel fiters and fuel lines
- replaced distributor cap, coil and ignition leads
- checked plug gaps
All without success. The engine misfires a little (not badly) and starts easily. Oil pressure is fine, as are cylinder compressions. The starboard tach was replaced after found to be faulty during survey but now reads incorrectly (high). Weve checked the settings and it is set correctly, so have been syncing it with port which is reading correctly as determined by our technician. WOT on starboard is estimated at about 2500 to 3000 max (if we take the reading when synced with port). One other thing to note, but possibly unrelated, is that starboard never seems to reach operating temperature; it creeps up the gauge to maybe 160 but doesn't get higher and doesn't match port which reads as it should (don't have the exact temp reading with me, but its normal). The tech has connected the engine to his diagnostic computer and all is showing normal.
We're now sick of replacing parts with no return. Any ideas where we should look now? This is getting very frustrating! Thanks.
