04 sportster LE DI dies when throttling down

[jjbauer81]

My boat will start fine, it will idle, and it will throttle up fine, but as soon as I back the throttle down to less than 2000 rpms, it dies. Even if I throttle up quickly before it dies, it does not keep it from dying. When I try to start it again, it will fire up and die and repeat this a few times before it starts back up again. And then the process starts over. It'll throttle up fine, but as soon as I throttle down, it dies. I put brand new plugs in it and it didn't help. I even drained the fuel tank and put in brand new gas, and it didn't help. Any ideas?

 

[Bills86e]

Symptoms of air leaking into fuel suction side of carb. Look at Separator filter bowl
square O-ring seal. Bills86e

 

[jjbauer81]

It's not a carb engine, it's fuel injected.

 

[Bills86e]

Ahhh BOAT. Yer in ski section. Check fuel pressure. Could be sock is clogged.

 

[jjbauer81]

oops, my bad! Should I repost in boats?

 

[jjbauer81]

I don't understand what you mean by the sock being clogged?

 

[Bills86e]

The fuel pump has a filter (sock) on the bottom that can clog, preventing fuel flow.
Your system should be tested for 59lbs psi.

 

[jjbauer81]

After doing some research I found something about needing the tps reset. Is it that a possibility?