I have a Silverton 410SB with 8.2's. I had mechanic change fuel filters (cylinder and pancakes) on each engine a couple of months ago. Seemed to start easier and throttle response was better for first day, but returned quickly to acting the same. Still no high end rpms. 3400 and 3200 ish is all I can get at full throttle. Mech asked if I have had a tune up recently, and I haven't in 2 years. Always use Startron or Seafoam additive. I am trying to run as much fuel out before changing filters again (@ $500 a whack) service charge. Wish I could find someone to pump out my remaining 1/4 tank and start with an empty one.
Had mech out for test drive yesterday. Both sides run smooth at 2000 rpm. When pushed up, only getting about 3000 port, 3200 stbd, with rough running, cycling down about 500 rpm, then back up, and even sputtering (popping sound) in stbd.
Had computer hooked up while running, and monitor showed nothing abnormal (temps, manif press, etc.). No codes either. Mechanic said sounds like possibly fuel injectors, cross-firing, maybe even timing prob. Gonna start there first. Then, go for plugs, compression, etc.
Again, at end of season last year with lots of gas run through, fuel additives, sta-bil for winter, filters, etc. and to no avail, looking elsewhere from just a fuel prob. Suspect ethanol, though. Wanna fix, but as with everyone, don't wanna chase this around for a long time with big bills! Something just not right though....
Had mech out for test drive yesterday. Both sides run smooth at 2000 rpm. When pushed up, only getting about 3000 port, 3200 stbd, with rough running, cycling down about 500 rpm, then back up, and even sputtering (popping sound) in stbd.
Had computer hooked up while running, and monitor showed nothing abnormal (temps, manif press, etc.). No codes either. Mechanic said sounds like possibly fuel injectors, cross-firing, maybe even timing prob. Gonna start there first. Then, go for plugs, compression, etc.
Again, at end of season last year with lots of gas run through, fuel additives, sta-bil for winter, filters, etc. and to no avail, looking elsewhere from just a fuel prob. Suspect ethanol, though. Wanna fix, but as with everyone, don't wanna chase this around for a long time with big bills! Something just not right though....