2005 200 HPDI No Spark #5 Cylinder

Just finished the 500 hour service and wet tested the boat today before a run to the islands next week. Noticed the starboard engine running rough at idle.

Started pulling plug wires at idle and found #2, #3, and #5 not sparking. I know 2 & 3 dont run at idle but 5 should. Swapped the plug out, still nothing. Pulled an ignition coil off the prt engine swapped it with the #5 coil on the starbboard engine, still nothing. I'm stumped now and need this thing running before Thursday!!!

Here's what I did for the service:

New batteries
plugs
Cleaned O2 sensors
lower unit oil
water pumps
all fuel filters
cleaned oil tanks and replaced filters
Sprayed down all electronics


Any ideas wjat this could be? I checked all electrical connections and found everything to be in order.

Just finished the 500 hour service and wet tested the boat today before a run to the islands next week. Noticed the starboard engine running rough at idle.

Started pulling plug wires at idle and found #2, #3, and #5 not sparking. I know 2 & 3 dont run at idle but 5 should. Swapped the plug out, still nothing. Pulled an ignition coil off the prt engine swapped it with the #5 coil on the starbboard engine, still nothing. I'm stumped now and need this thing running before Thursday!!!

Here's what I did for the service:

New batteries
plugs
Cleaned O2 sensors
lower unit oil
water pumps
all fuel filters
cleaned oil tanks and replaced filters
Sprayed down all electronics


Any ideas wjat this could be? I checked all electrical connections and found everything to be in order.

it could be the injectordriver box. has the engine been underwater ?
there is a small hole under the connector to the driverbox pull it off an see if any water is there - if so the small wires could be damaged.
look at the pic. cut open injectordriver box
tommy

Engine has never been underwater. I will check to see if there is any water in there tho.

it could be the injectordriver box. has the engine been underwater ?
there is a small hole under the connector to the driverbox pull it off an see if any water is there - if so the small wires could be damaged.
look at the pic. cut open injectordriver box
tommy

Where on the engine is that box? How big of a box is it?

[boats.net]

That engine will cut 2 or more cylinders at idle, put it in gear to see if fires when in gear.

But the port engine is only cutting two cylinders at idle. Stb engine is missing three.

[boats.net]

I have had them cut four cylinders but that is usually due to a fautly shift switch, The ECU controls it and it may be due to high idle or TPS setting off.

Checked all connections and everything seemed good. Fired it up today and it works fine, firing on 4 at idle, all six in gear. Only thing I can think is maybe my "light" mist spray on the powerheads got something wet?

[boats.net]

If does it again check the shift switch.

Will do thanks!