Left stranded on ICW - '07 5.0 GXI Safety Lanyard circuit?

[ejnichol]

Need some advice if anyone can help. Thanks

Almost seems like safety lanyard circuit is shorted. Is there a way to eliminate that circuit for test purpose?

Below is the long story.

Down here on vacation with boat. Left out Monday to go down to Calabash about 20 mile ride.
When I started at at boat launch it was fine. Drove to boat dock to get wife about 10 min ride. Went to restart it acted like vapor lockitis and had to give a bit of throttle which hasn't happened since new fuel pump installed last spring.

19 mile ride ran great. Arrived at fork in waterway slowed check chart and proceded to enter channel to docks. Boat shut down from idle speed and never woull restart. Tried what little I had, replaced fuel filter, checked fuses all good. All it would do is turn over but not hint of ignition. After exhausting ideas and boat banging on oyster shoals we got it towed for a bit of $$$.

I thought it was a fuel supply issue either the anti-siphon vavle, bad gas or bad pump. I've ruled out all three. Suck on fuel line to pump and it's provides plenty of fuel. And gas is fresh from busy station. Smell good. For time sake got in an amazon special fuel pump and installled same no fire. Ordered a better quality pump which is enroute.

Pulled spark plug and it was clean and no hint of fuel. I grounded spark plug to engine cover bracket which is good ground. No visible spark that I could see.

Almost seems like safety lanyard circuit is shorted. Is there a way to eliminate that circuit for test purpose?

 

[ejnichol]

Possibly bad fuel pump relay. Two identical relays, Swapped them and pump fired up to pressure. Other relay appeared to be ignition so with it swapped to bad it wouldn't fire but pump pumps up.

Tested kill switch and what little i could tell its working. pushing it in causes clicking relay in engine bay.

Can't tell which it is.

 

[alldodge]

Your first time it would not start and giving it more throttle it started.

Giving it more throttle does not allow it to start this time?

 

[Scott Danforth]

the safety lanyard is usually just a break in the ignition wire. so if its not working, nothing back to the engine will work.

follow the purple wire from the key switch, it then goes thru the safety lanyard, then to the motor.

 

[ejnichol]

The throttle movement didn't do anything second time or thereafter.

The fuel pump would not cycle up to pressure at key on at break down or any attempt thereafter.

I manipulated kill switch button and that casued guages to fire up and a relay in fuse block to click.

Pretty sure its a bad relay. Going to pick one up so both relay will be good and it should run. Will see.

 

[ChooChooSnakeMan]

Sorry for your problem, I'm following this as this is great information, please post what the problem proves out to be. Thanks!

 

[ejnichol]

It was the bad fuel pump relay. $ 10 part cost me $ 1000.

But it was a good education in trouble shooting without a shop manual, multi meter or my tool assortment back home. Unplugging devices to isolate relays, pumps etcc was very helpful.

What saved me was the fact that fuse block hand five relays but used only two types. That allow me to swap around and see if dead device(pump) would wake up with a good relay. It did. Also Advance Auto 20 mins away carried relay.

Thanks for feedback. I'm repacing all my realys except for trim. Will keep a spare new for that function.

 

[ejnichol]

Glad it wasn't kill switch. Looked like I had to get behind bolster to remove that shifter.