Ms6 fuel rail pressure loss past 5000rpm

[Enki]

Corksport, local hardware store.

 

[Rogi]

another update, i did swap the x-ring with an old one. here are the datalogs, it is definitely hpfp related, not sure if i maybe installed the parts wrong when rebuilding the pump or what. am going to take it all apart tomorrow and re do it. @Enki do you have a good write up on the rebuild procedure by chance? i followed corksport how to video for reference last time

 

[Rogi]

Corksport, local hardware store.

i will check at local hardware store, the reys kit i purchased through graveyard, am going to contact them on monday aswell, hopefully they can work with me on a new one.

 

[Enki]

Corksport has you do too much. Focus on the internals and spill valve, clean them with napththa, lubricate and prime with redline injector cleaner. I think theres another thread around here somewheres that covers most of this.

 

[Rogi]

Corksport has you do too much. Focus on the internals and spill valve, clean them with napththa, lubricate and prime with redline injector cleaner. I think theres another thread around here somewheres that covers most of this.

noted, i will take the hpfp apart tomorrow and double check my work. i saw the thread about the rebuild but noticed that the orientation of the pieces for the damper is different than what corksport mentioned on their video. from the forum it shows :
Washer with Lip "lip goes away from pump'
Washer
Pancake
Spring


but on the corksport video it is
Washer with Lip "lip goes away from pump'
Pancake
washer
Spring

any insight on which is the correct order?

 

[Enki]

Doesn't matter, that's not a moving part and doesn't need to be removed, pretty much ever.

 

[Rogi]

Doesn't matter, that's not a moving part and doesn't need to be removed, pretty much ever.

okay yea i did too much then when rebuilding the pump the first time. i took everything apart like the corksport video showed. i know you said earlier on this thread that you had an issue before with the internals not retracting via spring force fast enough for a full stroke. what was the cause in your instance?

 

[Enki]

Piston was sticking forward. I can't remember if it was an issue with the internals themselves or something else, but I've probably seen most of the issues that you can have with the HPFP.

Also, don't forget to put that spring puck back in if you take it out; pretty sure if you leave it out your fuel system will get damaged.