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Mal evolent
Samba Member
Joined: March 31, 2009
Posts: 2912
Location: San Antonio, Nuevo Mexico
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 Posted: Sat May 26, 2012 9:51 am Post subject: Fuel Injection Diagrams Collection FAQ |
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To link to this thread copy and paste
| Code: |
| [url=https://www.thesamba.com/vw/forum/viewtopic.php?t=513607&start=0&postdays=0&postorder=asc&highlight=]Fuel Injection Diagrams Collection FAQ[/url] |
1978 FI System:
FI Wiring simplified:
AFM (air flow meter)
7 pin AFM
From AMSkeptics Double Relay Tutorial
Double Relay simplified
Double Relay Ignition on, engine off:
Double Relay Start:
Double Relay Run:
Double Relay Wire Colors:
Double Relay Plugs:
White wire is a bonus wire found on a 79 Calif?
The Fuel Flow
Injector Leak Down Test
______________________________________________________________________________________________________________________
--VACUUM HOSE DIAGRAMS
Vacuum Hoses 73-74 Carbureted
Vacuum Hoses 75
DVDA
SVDA
Vacuum Hoses to 76 1/2
Vacuum Hoses to 76 1/2 with EGR
Vacuum hoses 76 1/2 to 79 Federal:
Vacuum hose 75-76.5 and 79 CA models DVDA
From RATWells vacuum hose page
Vacuum Hoses 1
Vapor Hoses Overview
Vapor hoses T:
Aux Air regulator:
vapor hoses to carbon canister:
Pressure Regulator:
SVDA:
Breather and Decel valve:
ECU CONTROL UNIT BLOCK DIAGRAM:
https://www.thesamba.com/vw/forum/viewtopic.php?p=8575116#8575116
"The Bosch L-Jetronic Technical Instruction manual has a really good overview on that. You can find it as a PDF online and read pages 16 and 17 for more info, but it all boils down to this diagram and the fact that a basic injector time is calculated and then corrected by a given factor that is a combination of the engine condition read from the sensors."
http://www.cardiagnostics.be/-now/Educational_site...Manual.pdf
"The best block diagram of an L-Jetronic ECU I've found does not come from Bosch, but from a 1977 Datsun 280Z manual. It's for 6 cylinders, but the logic is exactly the same (just think 4 cylinders and engine temp instead): "
_________________
73 Beetle Baja, Ghia front brakes, Type 3 rear brakes, 2220 ( 94 X 80 ), Weber Progressive, Bosch SVDA, '97 Mustang seats
Baja Bugs for Volkswagen Virgins: Index
Last edited by Mal evolent on Mon May 28, 2012 5:56 pm; edited 1 time in total |
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Collie
Samba Member
Joined: April 03, 2006
Posts: 1285
Location: Virginia
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| Posted: Sat May 26, 2012 9:53 am Post subject: |
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Now THATS a sticky candidate right there!!  |
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Air_Cooled_Nut
Samba Member
Joined: March 27, 2004
Posts: 3068
Location: Portland, Oregon
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| Posted: Sat May 26, 2012 10:24 pm Post subject: |
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As always, AWESOME work!
_________________
Toby http://www.aircoolednut.com/
Did I mention that I'm an original Darksider?
'72 VW Squareback, 2007cc, GB 5-speed, rag top; '76 VW Riviera Penthouse Sundowner 2.0L; 2015 Audi S5 Cabby w/Stage II APR; '06 Ducati Sport Classic 1000; '14 Ducati Diavel Strada
The First Invasion |
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timo78
Samba Member
Joined: July 03, 2009
Posts: 931
Location: Overcast and Loving it
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| Posted: Sun May 27, 2012 9:06 am Post subject: |
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Nice collection, thank you for compiling these together.
_________________
 > 78Grµn Westfalia `Donkey`
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It may be bigger than you and it may be bigger than me, but it’s not bigger than you AND me; can you dig it? |
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curtis4085
Samba Member
Joined: July 22, 2011
Posts: 4806
Location: Colorado
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| Posted: Sun May 27, 2012 9:39 am Post subject: |
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Great work gathering the info. One suggestion would be to post the key as well so others can know what the letters mean.
_________________
Special Thanks to:
Headflow Masters - Vista, CA
www.headflowmasters.com |
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onion456
Samba Member
Joined: September 09, 2006
Posts: 674
Location: Houston, TX
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| Posted: Sun May 27, 2012 5:18 pm Post subject: |
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found this one in the gallery thought it was cool...
i have some stuff on my other computer too ill try n dig it up.
_________________
'76 Sage Green Westy 2.0 FI
'76 Creamsicle 7-passenger 2.0 CS FI
'85 Tan Westy |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 51427
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| Posted: Sun May 27, 2012 6:09 pm Post subject: |
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| onion456 wrote: |
| found this one in the gallery thought it was cool... |
Looks like D-jet and not L-jet.  |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 51427
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| Posted: Sun May 27, 2012 6:16 pm Post subject: |
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I find the schematic for the FI shown in the standard current track diagram to be the most helpful. Just separating out the FI part of the standard drawing would be quite helpful.
Another thing that would be great to have would be a trouble shooting chart similar to what the Vanagon Bentley has. It takes almost no thought to use the Vanagon chart, whereas using the info in the Bay Window Bentley can be trying. |
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onion456
Samba Member
Joined: September 09, 2006
Posts: 674
Location: Houston, TX
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| Posted: Sun May 27, 2012 6:44 pm Post subject: |
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| Quote: |
onion456 wrote:
found this one in the gallery thought it was cool...
Looks like D-jet and not L-jet. |
dang, wasnt sure bout that air cleaner =)
heres a few more, probably raped from ratwells, ive found em useful.
85 - Ground
86 - Thermo time switch and ECU pin 4
86a - Starter
86b - AFM harness connector #36
86c - Terminal 15 of ignition coil (+12v)
88a - AFM harness connector #39
88b - Series resistors and ECU pin 10
88c - Aux air regulator
88d - Fuel Pump
88y - Battery +12v
88z - Battery +12v
_________________
'76 Sage Green Westy 2.0 FI
'76 Creamsicle 7-passenger 2.0 CS FI
'85 Tan Westy |
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SGKent 
Samba Member
Joined: October 30, 2007
Posts: 41194
Location: Citrus Heights CA (Near Sacramento)
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| Posted: Sun May 27, 2012 11:59 pm Post subject: |
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really nice but too bad you didn't post it in the FI sticky so everyone can find it 2 years from now.
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"Most people don't know what they're doing, and a lot of them are really good at it." - George Carlin |
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12847
Location: San Jose, California, USA
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| Posted: Mon Oct 14, 2013 8:29 pm Post subject: ECM diagram, schematic, pin out |
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78 Calif. ECU Schematic/thanks ratwell
Last edited by Tcash on Thu Jul 07, 2016 4:32 pm; edited 2 times in total |
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ser123ser
Samba Member
Joined: February 03, 2008
Posts: 148
Location: PERRIS CA
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| Posted: Thu Nov 21, 2013 8:07 pm Post subject: |
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OMG".......
I have seen a lot of this back in 2011 when I built my motor and fi system, just Ina lot of different places. Now it is all in one place.
Outstanding ".......... |
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74Pepper
Samba Member
Joined: March 26, 2007
Posts: 719
Location: Dallas, TX
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| Posted: Tue Jan 21, 2014 4:38 pm Post subject: |
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I think I just wet myself....I was hearing angels and harps flipping through these images! Converting back to FI from scrounged parts just got that much easier!
Thank you, thank you, THANK YOU! 
_________________
'66 Beetle, in restoration
'74 Ghia, in restoration
'77 Westfalia Campmobile - Dangit - rear-ended! Now has primer-butt!
Per Gary, A.K.A. "Purple dress girl") |
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russwiththebus
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Joined: September 25, 2007
Posts: 930
Location: Chattanooga, TN
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| Posted: Tue Jan 21, 2014 7:31 pm Post subject: |
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| I love it! Some I've seen, some I hadn't. Nice to have them all in one place! |
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12847
Location: San Jose, California, USA
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| Posted: Thu Mar 13, 2014 10:09 am Post subject: FI Daigrams |
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HerrMahnenschmidt
Samba Member
Joined: July 22, 2011
Posts: 94
Location: WY, NoCO, NoCA, here, there, elsewhere...
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| Posted: Fri Jun 20, 2014 8:32 am Post subject: |
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Would it be unseemly to say -- I love you all? This thread is so beautiful I have to choke back the tears...
_________________
1977 Westfalia --
- rebuilt stock-spec 2.0l FI engine; 002 tranny w/stock gearing with 215mm flywheel/clutch/pp |
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12847
Location: San Jose, California, USA
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| Posted: Sun Dec 07, 2014 3:36 pm Post subject: |
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73 Vacuum hose diagram
Last edited by Tcash on Sun Dec 21, 2014 8:51 am; edited 2 times in total |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 51427
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| Posted: Sun Dec 07, 2014 6:16 pm Post subject: |
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| Shouldn't the one hose to the charcoal canister tie into the fan shroud and not the air cleaner? |
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12847
Location: San Jose, California, USA
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| Posted: Sun Dec 21, 2014 8:52 am Post subject: |
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| Wildthings wrote: |
| Shouldn't the one hose to the charcoal canister tie into the fan shroud and not the air cleaner? |
Thanks Wildthings. I deleted the diagram.
Tcash |
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Tcash
Samba Member
Joined: July 20, 2011
Posts: 12847
Location: San Jose, California, USA
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| Posted: Sat Feb 07, 2015 11:44 am Post subject: Early EGR Temperature Switch |
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In the fuel injection section. Temperature switch Prt# 022 131 519.
Could not find a diagram with it.
I drew this one in. I would think it goes here, to not allow the EGR to operate when the engine is cold.
Tcash
Last edited by Tcash on Thu May 12, 2016 4:54 pm; edited 1 time in total |
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