Mercury 200 EFI, sporadic fuel delivery issue on bumps

[bbarthelt]

Hi all,


I have a 1996 Merc 200 EFI, SerialOG361511. It's on a 1996 Charger 295TF with an 8" jack plate.


In the last 2 hours of my last tournament of the season, I had the following symptom when running. The water was mostly almost perfectly smooth, but at speed, any time the boat hit any wave, or if the boat chined, the motor seemed to lose fuel delivery. It was acting as if I was pulling off the throttle for a second with each bump. As soon as the boat settled the RPMs shot back up. Does this sound familiar to anyone? Thanks in advance for your help.

[brushsjigs]

How much fuel was in the tank?

[EuropeanAM]

Also could be electrical, such as the cannon-plug connector (disconnect, clean male pins, spread male pins EVER so slightly with an exacto knife, then reconnect and LATCH into its locking device to prevent loosening or vibration).

[bbarthelt]

How much fuel was in the tank?

Plenty of gas, > 1/2 tank.

[bbarthelt]

Also could be electrical, such as the cannon-plug connector (disconnect, clean male pins, spread male pins EVER so slightly with an exacto knife, then reconnect and LATCH into its locking device to prevent loosening or vibration).

Thanks for the suggestion, I'll definitely check this out. Any other obvious electrical connections that you can think of that might cause that behavior?

[leonreno]

Maybe a failing fuel driver in the ECU?

[bbarthelt]

After reading your replies and doing more research, I'm more and more convinced the ECU has issues. There are other symptoms I won't bore you with. Thanks all to replied, it was very helpful.