Did you recently replace your spring in the FPR with the blue spring? Is that when this new problem started? It's possible that you cracked the inlet fuel line. Others have done it.

 

part 3c3z9j338aa aka 9j338

Hard to tell if this part goes all the way from the hfcm to the fuel bowl.

Makes me want to cut the quick connect line off and slip a diesel rated rubber hose over the two metal tubes. Would this work?

 

There is only one area to check, that's tank to HFCM, all the other lines have pressure. pump sucks from tank thru filter.

 

Yep--it will work just fine or you can use a brass tubing union.

 

I have great pressure and no bubbles immediately after HFCM if I take off the quick connect and test directly on the metal tube coming out of the HFCM. So I figured it must be the quick connect fitting that is allowing are to be sucked into the line.

 

How would that help me connect the metal fuel line to the metal tube coming out of the HFCM?

 

That would be a kind of permanent repair, huh?? You're better off to do it with hose and clamps but it's a lot of pressure for clamps. Would compression union have made more sense?

 

I have dug into my engine twice in the last 6 months. Once for an egr oil cooler replacement and again to track down a high pressure oil leak. Entirely possible that I tweaked the fuel supply line at some point.

 

So I probably just need to order this thing from Tousley for $93 instead of my local dealership for 212.

Is it a PITA to replace?

 

Are those metal tubes 5/16 or 1/2 inch? Sure seem like 1/2 to me.

 

Mine are 5/16 tubing. I'm thinking that both ends of one of the lines are not the same. Yours may be something different. I do know that if you cut the end off that you have to leave as much length as is physically possible to have enough room to make it work.

You might just want to look inside the tube to see if the o-ring/seal is cut or out of place. You are probably better off just ordering a new fuel line.

 

Can you replace the seal in the quick connect fitting?

 

I honestly don't know if they're available. I've never heard of it being an issue.

 

I would pressure test the fuel line.

 

OK so I did 2 things to finally get this to 50 psi.

I placed a .177 BB under the FPR spring. Quickly restarted it and didn't seem to see much difference. Then I replaced the fuel line between the HFCM and the fuel bowl that (there is still one all metal fuel line still left to the bowl) has 2 quick disconnect fittings on either end.

Some combiation of the two does seem to have worked and the psi is holding steady at 50 psi. I am now in FL. This still seems a little low for all the work I have done. About 2psi per $100 that I have spent. When I have the time I will pull the cap to the secondary fuel filter and see if the new fuel line has eliminated the bubbles. If there are still bubbles then the increase is due to the BB and not the $150 fuel line that I installed.

On our way to FL I was keeping an eye on the fuel psi and noticed it had dropped to 35. I quickly pulled over and let the car sit for a while. When I tried to start it again it was dead. Turned out the alternator wire had a bad connection and wasn't charging the batteries. So now we have another possible reason for low psi which is a bad alternator/connection.