Hi. 1999 270 DA, 7.4L MPI. Last year, running open throttle, ran great, when slowed down, engine ran erratically (RPM not consistent), but well enough to use. Before winterizing, put in fuel stabilizer in tank which was half full, then stored. Ch...
I had a similar situation recently - 1999 270DA with 7.4L MPI with cool fuel suystem. It would run erratically at lower RPM and even stall. Long story short, at the advice of another member (Wingless), I checked, among other things, the fuel pressu...
Update #4 - turns out the fuel pressure regulator was bad - changed it and runs great now! Looks like the issue with the temp is the thermostat - changed the gauge and sender and no change. I replaced it in the spring but I guess it's getting stuck...
Update #3 - checked the sender connections, all good. Checked fuel pressure at the fuel rail - 60-75 psi at 1000 rpm. Spec says 43! Guessing fuel pressure regulator is shot, but it was idling nicely so....?Had the marina mechanic connect their dia...
Hi - update #2 - took it out for the first time today. Ran great at 3/4 OT. When slowed for no wake zone ran very erratically (just like last year but I think worse). When put in neutral it stalled. Tried to restart a couple of times but just died r...
Update - everything checked out ok except the plugs were gapped at around .020, should be .045. Rookie mistake on my part to assume pre-set was correct = lesson learned! Runs great now! Thanks again.
