DT150 starting issue

[dspar00a]

My 2000 DT150 is giving me issues. Took it out a couple weeks ago and it started fine always in the first crank took off down the lake just fine. Stop and fish for a while, then decide to go to next spot. Start up the motor head up to the front to troll out of some brush before taking off and my motor dies. Acted like it idled down too low and died. Since then will not start back up. I have replaced bulb and fuel lines, checked spark which is fine and checked the filter. No luck this far. Hoping someone else can give me some insight. It really didn't seem like anything other than it just died. I can't see where it's turned into such a big issue.

 

[99yam40]

Re: DT150 starting issue

should be an injected motor,
need to monitor fuel pressures to make sure in spec
and then test injectors to make sure they are getting signals to open and make sure they operate/flow fuel

 

[dspar00a]

Re: DT150 starting issue

I am still trying to diagnose this problem. So far nothing has been successful. I read on another post where you should hear the fuel pump prime when the key is in the on position for a few seconds? If this is true I am not getting that. I only hear a click coming from a black box under the starter then nothing. Once I turn the key over and start cranking it cranks but never any kind of prime or something from the fuel pump.

please help if anyone has any ideas.

Thanks

 

[limitout]

Re: DT150 starting issue

sounds like your fuel pump died (most likely) or got jammed (very unlikely)

you should have something called a "fuel vapor separator" which is your fuel reservoir for the fuel pump.

on my motor I had to remove the intake manifold to take it off and check the fuel pump.

a fuel pump (if you need one) for mine (df40) ran $300 and I was told most fuel pumps are a common shared part used on most all motors so prices don't vary much.

if you are lucky it could just be a stuck float needle but you should hear the fuel pump whirring if its working.

 

[dspar00a]

Re: DT150 starting issue

Do you think the high pressure pump has just failed? Or could maybe be the diaphragms in the low pressure pumps or something?

 

[lakensea]

Re: DT150 starting issue

If you do not hear the high pressure pump come on for 5 seconds when you turn the key to "ON", then you have one of three possible issues. First is a bad high pressure pump (unlikely, and it is NOT in the vapor separator tank on your engine - it is external on the port side of the engine). Second, and least likely is a break in the harness between the ECU and the pump. Lastly, most likely and unfortunately the most expensive is a blown high pressure pump circuit in the ECU generally caused by a bad fuel injection voltage regulator, which is generally caused by poor battery connections.

You need a factory service manual to properly test the system.

 

[dspar00a]

Re: DT150 starting issue

Just to be sure I understand which parts are what I am going to post a few pictures. The black box that I am pointing at is where the click is coming from but thats all im getting.

This should be the electronic fuel injection computer right?


Then the high pressure pump down on the bottom in the canister..


Then vapor separator system..

 

[limitout]

Re: DT150 starting issue

Do you think the high pressure pump has just failed? Or could maybe be the diaphragms in the low pressure pumps or something?

very possible, it is just an electric pump so yes it can just fail out of the blue, the low pressure pump is usually mechanical in nature so it is not going to cause your pump not to run, this is your main problem, why isn't the pump running. no pump running means no gas to the engine so no need to look any further until you diagnose why the pump isn't pumping. check voltage to it and if it is getting voltage then it should run if it is not bad.

the clicking is the relays working as they should to send power to things so they might not be sending power to the pump. like I said start at the pump checking for power and then work backwards from there until you find where the power is not getting through and why.

most failures are from simple failures so don't overthink or overcomplicate the troubleshooting process until you check the basics like power supplies first.

at least with your system everything is easier to get to and work on.

 

[dspar00a]

Re: DT150 starting issue

Thank you. I appreciate the help. I'm gonna get a voltage meter and see what I can find.

 

[dspar00a]

Re: DT150 starting issue

Issue was resolved. Had to replace hi pressure fuel pump. Thanks for everyone's help