MountainTurbo

So just wanted to say thanks to everyone that has helped me in my struggle to get my rebuild started.

After many problems that turned out to be not the "big one", we finally figured it out.

I was having a weird problem with fuel pressure, I was seeing 60psi in the line, 80 when the car was running. After lots of dead ends (replacing FPR, checking vacuum to the FPR, verifying the return line wasn't clogged etc.), we finally figured out the problem.


For some reason, the FPD was barely letting any fuel by. I have no idea how it was blocking fuel flow, but it was. Once that was fixed, the car started right up and I was able to drive it around the neighborhood! So now I just need to finalize all the wiring, route it etc. and put on some break-in miles.

Anyway, thanks so much to Hailers, reted, and everyone else who's tried to help me track down my problems, it finally paid off!

pinkfloyd

Hailers is a great guy, if it where not for him I would not have started my car today for the first time, although it does not idle/ or run yet.

Its great to hear you got your car running, i remember reading some of your posts.

SonicRaT

iTrader: (6)

Pfft, nice of you to forget me! I replied in the thread too, hailers just beat me by two minutes though!

NOPR

congratulations!

MountainTurbo

lol

It wasn't done intentionally! I was pretty worn out last night, so I could only remember a couple of screen names!


Thanks to SonicRat too! hehe

SonicRaT

iTrader: (6)

Haha, yeah, it became pretty weird when you said there was 60psi at the rail, especially at idle, so it was either bad FPR or something was plugged, glad it worked out though!

MountainTurbo

Me too!

I can't figure out how in the heck the pulsation-dampener was blocking the flow though! Weird.

RETed

Is it confirmed the FPR was bad?
Can you cut it open to see what was wrong?
Do you know what was wrong with it?


-Ted

MountainTurbo

It wasn't the FPR, it was the fuel pulsation dampener

I have no idea why it did what it did, but that's a good idea, I'll see if I can pull it off and cut it open tonight to figure out what the crap caused it!

That was one of the reasons this problem had me running in circles. I replaced the FPR, same issue remained. Tested vacuum source for fpr, it was good. Swapped my walbro out for my stock pump, issue remained. Checked pressure on return line, no pressure (as it should be). Pulled return line off, blew through it, got bubbles in the tank so it wasn't blocked.

Finally pulled both rails off and tried blowing into the feed line on the primary rail. Nothing, or next to nothing came through. Couldn't see any clogs or anything, but once I put on a different primary rail, the car fired right up.

Sooo, I guess what was happening is somehow the FPD was blocking fuel flow. I have NO idea how, since looking into the feed line it didn't look like it was blocked. When the car was building soo much pressure in the line, some fuel was getting through into the rail. Basically enough to start the car, but not enough flow to keep the car running. What a relief to get that figured out!

RETed

Yeah, carefully cut the "cap" off, and then you can pull it apart...
My favorite method is to grind the crimped flange off with a big file.
Yeah, it takes a while, but you don't end up damaging the rubber diaphram inside.

Else, if you got a bench grinder, carefully grind down the crimp flange.

Take pics!


-Ted

SirCygnus

iTrader: (1)

or just throw it away and get banjo bolt.

MountainTurbo

I just went with an S5 fuel rail instead

That's a good idea, I think I'll just take the dremel to that flange and see what happened.

RETed

Yeah, that metal is not very hard.
It's very ductile, and even a large hand file will cut through it in a few minutes...


-Ted