how to remove injectors on hpdi

[skeeter7]

This is another post on my troubled outboard, 2000 150hp vmax hpdi(vz150tlry). We have now changed all 4 fuel filters, cleaned out the vst, and put new plugs in. We are still having problems. The motor still turns over, but has a really hard time starting. Even when we can get it to start it really struggles with idling and dies. Once we get it started and throw it in gear it will only get up to about 4000 rpms and has no power. The boat can't even get on plane. This is getting really frustrating now. We are still thinking it is a fuel issue and it seems that the injectors are next on the list. We are still pretty new to this motor, so how should we go about getting to and removing these injectors? Any other ideas on a diagnosis?

 

[scotakns]

Re: how to remove injectors on hpdi

Read my posts and it will give you some info you will need to look for

 

[rodbolt]

Re: how to remove injectors on hpdi

first verify does the HP sensor voltage remain in spec AND the medium pressure remain in spec AT the problem RPM and load.
gotta, must, seriously, check both together or you can chase some expensive ghosts.

 

[skeeter7]

Re: how to remove injectors on hpdi

Thanks rodbolt. So by testing them both together I should do both sensors simultaniously? Where about are these sensors located? Can I just test these sensors with a multimeter? What is the spec voltage suppose to be? It seems every rpm is my problem rpm so I guess I'll just try in neutral and work my way up. Sorry for all the questions, but I'm still new to this motor and I can't seem to to find a manual either. I appreciate your patience and help and thanks for the heads up on the sensors.

 

[skeeter7]

Re: how to remove injectors on hpdi

OK, thanks scotakns. So I just read through your threads and I have a little better idea of what I'm looking for now. My issues are a little different than yours, but I'm sure a lot of it is similar and relevant to my problems. Should the voltage on the sensors and psi on the vst be the same for my motor even though it's a 2000? Also scot, how did you end up doing with your motor? Did it end up being a filter inside the hp pump that was bad? Thanks again guys.

 

[scotakns]

Re: how to remove injectors on hpdi

I haven't tested it on the lake again yet. I will post as soon as I do.

 

[rodbolt]

Re: how to remove injectors on hpdi

quit thread bouncing, go back to the originals.
I WILL NOT chase threads.
to confusing and I aint got time for it.
last post on this thread.