FI info

grethi · Posted: Mon Apr 18, 2005 7:59 pm Post subject: FI info

Is there a better diagram of the 68-69 FI system than in the Bentley manual? Today I finally took the plunge to convert my carbs back to FI. Shocked

I've had the parts since the start of the year. Since I finally had 2 days off together, I figured I'd do the swap. Or at least get it started.

Right now, my two biggest problems are that I don't have any idea about the wiring connected to the pump (a part that's almost bypassed in Bentley Mad

) and the vacuum lines Mad

.
There aren't any proper diagrams of the top of the engine, at least not from what I've seen.

My fuel pump is being run through a 4-way flasher, and I don't know where the wire go on it. ANd the vacuum lines are anyone's guess, based on the info I'm working with.

And Martin: If I don't get any answers here, I will be calling you in the morning.
_________________
My mind not only wanders, sometimes it leaves completely.

'69 square

Russ Wolfe · Posted: Mon Apr 18, 2005 8:13 pm Post subject:

I have the factory fuel manual, here, but it would be a lot of scanning. What do you need exactly. Vacuum diagrams, and wiring??
_________________
Society is like stew. If you don't keep it stirred up, you end up with a lot of scum on the top!--Edward Abbey

Gary: OK. Ima poop.

grethi · Posted: Tue Apr 19, 2005 5:19 am Post subject:

At this point, anything would be helpful; even accurate second hand oral descriptions.
_________________
My mind not only wanders, sometimes it leaves completely.

'69 square

lowsquare · Posted: Tue Apr 19, 2005 7:12 am Post subject:

I'm needing to redo all my fuel lines as well... I know it was mentioned I'd need about 20' of line, what size diameter? Thanks... Wink

_________________
PRAISE THE LOWERED.
1973 THING

lowsquare · Posted: Tue Apr 19, 2005 7:16 am Post subject:

Sorry...I ment to post the above to the fuel leak issue...
_________________
PRAISE THE LOWERED.
1973 THING

Mr. Bubblehead · Posted: Tue Apr 19, 2005 7:40 am Post subject:

20 feet of 7mm or 7.5mm German FI fuel line is recommended, if that's not available locally 5/16" FI fuel line will work.
_________________
OGST
Samba Member #4862

SquareTone · Posted: Tue Apr 19, 2005 9:06 am Post subject:

I actually found the wiring diagrams for the early FI very helpful. The trick is that you have to look at more than one diagram. Part of it is in the engine diagram, part is in the chassis diagram, and part is in the fuel system section.

This picture helped me see where the hoses really go:

Image may have been reduced in size. Click image to view fullscreen.

lapuwali · Samba Member Joined: February 08, 2005 Posts: 38

Knowing how each bit in the FI works helps a lot in routing hoses and wires.

For the vac hoses: one goes to the MPS, which hangs on the left side of the engine bay; another goes to the distributor; another goes to the WOT pressure sensor, which hangs under the intake manifold on the right side. Those are all small hoses. One large hose from under the throttle body should go to the AAR, which sits on top of the engine near the distributor. The other nipple on the AAR has a large hose that goes to the air cleaner.

The fuel hoses should route from the feed line in the tunnel (left side) to the left side fuel rail, around to the right side fuel rail, to the pressure regulator (right side, in front of and below the intake manifold), and to the return line in the tunnel (right side). At the fuel pump end, they go from the tank to the filter to the inlet on the pump (labelled). From the outlet of the pump to the feed line. From the tank to the Y. From the Y to the return line in the tunnel. From the Y to the other pump outlet.

If you have a cold start valve, you'll need more hose there, but I don't have one, and have never seen one, so I can't help there.
_________________
'71 914
'69 Squareback
'67 912

josh · Posted: Tue Apr 19, 2005 11:07 am Post subject:

For some reason the recent editions of the Bentley have the wrong wiring schematic for the 68-69. The old manuals with full color schematics are correct. Keep an eye out for one. They're nice. I use my old Bentley for electrical and my new one for greasy stuff.

Russ Wolfe · Posted: Tue Apr 19, 2005 1:35 pm Post subject:

I am in the process of putting the Factory FI manual up on my web site. I need to rescan some of the pages, and finish uploading them. My computer started acting up, and I had to stop for a bit to fix it. Ya gotta love Windoze XP memory hog.
I should have the rest of it tonight.
http://classicvw.org/gallery/Fuel-Injection-Manual
_________________
Society is like stew. If you don't keep it stirred up, you end up with a lot of scum on the top!--Edward Abbey

Gary: OK. Ima poop.

Russ Wolfe · Posted: Tue Apr 19, 2005 2:51 pm Post subject:

Well, there are about 60 some pages of the factory FI manual up. There is still more to go, but that is enough for now. Most of the important stuff is there, with wiring diagrams, plumbing diagrams, etc.
I hope this helps.
Let me know if you find any more bad ones, and I will try and correct them. I fixed a few that I spotted right away. I had to replace the memory in my Windoze computer.
_________________
Society is like stew. If you don't keep it stirred up, you end up with a lot of scum on the top!--Edward Abbey

Gary: OK. Ima poop.


Hello! Log in or Register \| Help \| Donate \| Buy Shirts	See all banner ads \| Advertise on TheSamba.com

	Forum Index -> Type 3	All times are Mountain Standard Time/Pacific Daylight Savings Time
Page 1 of 1