Caterpillar lag on accelleration
I have twin Cats 3208s 425 horses. My port engine has a lag zone while accelerating. She idles at about 650. As I accelerate to 1100 rmps she lags back to around 950. As I increase throttle, she comes up fine. I don't think the starboard does this but most of the time I have already turned on the synchronizer, so both engines lag. Last weekend I noticed the port racor vacuum gauge indicated a problem so I changed the filter. No change to the Lag. Any ideas?
P.S. I posted this earlier in the wrong place.
Aquarius 1991 Californian 55 CPMY Long Beach CA