Convert fuel injection to carburator

[dassage1313]

I just got a 1971 squareback and was wondering if there is a conversion(kit) to go from fuel injection to carburator. It has an electrical/fuel injection problem

[Tram]

I'd fix the injection problem. Injection is the shizzle, carbs are stone- age.... and the worst of the worst is that damned Weber Progressive that you have to cut your engine lid for.
What sort of injection problem are you having?
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Немає виправдання для війни! Я з Україною.

[Mr. Bubblehead]

If it were my vehicle, I would try to fix the fuel injection. Post your problems in here, there's lots of people who are knowledgable and can help you. But if you absolutely must convert to carbs, here's what most people use:

http://www2.cip1.com/ProductDetails.asp?ProductCode=C12%2D1084%2D20

Also, try searching the classifieds, you might find a carb setup there for less.
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OGST
Samba Member #4862

[blankmange]

[dassage1313]

I have not started to dig into the problem yet, I know that some wires are burned, along with a relay. Im not sure if the control unit(fuel injection computer) is fried or not? I will be tring to replace all fried wires and see if I get any signals coming to the motor. I will keep you all posted, thanks so much

[Russ Wolfe]

I doubt if it is the control unit. They are pretty tough. But if you need one for a '71, I have 2 here that have been tested on my '71.
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[dassage1313]

I decided to try getting the FI going on my 2/71 squareback. I cleaned up all the burnt wires and ran a few new ones. The car cranks and I get power to the distribrtor, but no power to the fuel pump. I have power to 2 small relays under the back seat close to the Large relay that has a wire going to the battery terminal. I also have power to a terminal on a 5 prong relay under the dash on the firewall. Which one is the fuel pump relay. I looked at some scamatics online and couldnt tell where the fuel pump relay was located in the car. Can someone tell me where the fuel pump relay is in the car and what the other relays are?
Also, once I find the fuel pump relay, can I jump the fuel pump relay to run the fuel pump to see if the pump is working. I havnt gotten any fuel to come out of the hose that goes to one of the fuel rails.
Thanks
Dassage

P.S. Thanks for the offer Russ Wolfe, Ill let you know if my unit is still good once I find out

[tristessa]

The relay under the dash is the fuelpump relay. One of the two under the rear seat is the main FI relay, the other is for the rear window defroster.

Take out/flip up the rear seat bottom and turn the key on. Do you hear a "click" from one of the relays? If so, good, if not you need to check things out there. Also listen for a click from the under-dash relay. If the rear (main power) one clicks and the front (fuel pump) one doesn't, check/replace the fuelpump relay.

[Air_Cooled_Nut]

If you are going to do ANY of your own work on the car you REALLY need to get a Bentley shop manual. It has the wiring diagrams for the electrical system and the fuel injection, plus trouble-shooting help, exploded diagrams, etc.
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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

[Air_Cooled_Nut]

There's a wire that comes from the brain that grounds the fuel pump relay and allows it to feed power to the fuel pump. You need to make sure every terminal on the relay has a wire attached. In the engine compartment (for my car at least) there is a single wire connector near the front left area of the engine, in front of the intake runner. One of the wires will be gray.

Here's the wiring diagram for FI (fuel injection) for a late car:
http://www.icbm.org/erkson/ttt/engine/fuel_injection/elec_diagram_late.jpg

Item 15 is the fuel pump relay. The wire I'm talking about is the one that comes off terminal 85, the gray wire. Item 20 is the single wire connector. On my car this wire connector was disconnected. I found the wire from the brain close to the single wire connector, attached them, and fixed the problem, which was power at the relay but none going to the fuel pump
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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

[wynsquezr]

I made the conversion and wish I hadn't. I couldn't find this type of resourse at the time and couldn't find anyone locally who could actually fix it ( I understand how someone felt in their thoughts on $600 tune up). Wish I hadn't have issue's w/009 timing. ? would running 3/8 or 1/2 " balance tube from manifold to manifold w/ vacuum nipple at mid point provide sufficient vacuum to run stock FI dizzy ( which I understand to be a modified 050 SVDA). Also on fuel supply to duals,I mounted damn noizy accel pump and regulator at from beam and used both the high side and return fuel line from FI set up to feed each carb from behind firewall tin,looks nice and clean and will keep lines in normal condition for hopefully returning to FI. Since I have all of my FI system in boxes is it possible to bench test components and elec off vehicle ?

[blankmange]

[dassage1313]

Hay tristessa, I do have a clicking under the dash, but none of the relays click under the back seat. I do have power going to the relays in the back. I will check out witch terminals are getting juice.

Air_Cooled_Nut, thanks for the diagram. I have a wire connected at terminal 85. I have to double check to see if I have the grey wire connected to it.

Thanks everyone for your help so far

Dassage

[wynsquezr]

[negawsklov17]

hey all, i'm in almost the exact same situation as you dassage1313, i've got a 71 with FI, but i've got really bad mpg with the gas and very little power relative to other vw's. my top speed is only like 70 something, too. So... i have planned to use my dad's old dellorto's and convert to a dual carb system; the carbs are the larger ones, 44 i think? I had plans to also cut out the small area in the hatch and fabricate little humps over them. do you all think this is a good idea? i know you will say to save the FI system, but it's just not really giving me the performance i want and i've gone through everything that could mess it up. also, i want to have the dual dellorto setup because i have some other plans to rebuild the engine and make it bigger. MY QUESTION: would the air pressure sensor (under the left side of the luggage area) have any effect on the performance as stated??

thanks, billy
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yup, i drive a porsche

[blankmange]

[wynsquezr]

[quote="negawsklov17"]hey all, i'm in almost the exact same situation as you dassage1313, i've got a 71 with FI, but i've got really bad mpg with the gas and very little power relative to other vw's. my top speed is only like 70 something, too. So... i have planned to use my dad's old dellorto's and convert to a dual carb system; the carbs are the larger ones, 44 i think? I had plans to also cut out the small area in the hatch and fabricate little humps over them. do you all think this is a good idea? i know you will say to save the FI system, but it's just not really giving me the performance i want and i've gone through everything that could mess it up. also, i want to have the dual dellorto setup because i have some other plans to rebuild the engine and make it bigger. MY QUESTION: would the air pressure sensor (under the left side of the luggage area) have any effect on the performance as stated??

thanks, billy[/quote

Look in back issues of VWtrends tech articles or I'll try and find my copy there's and article about cutting about an 1 1/2 inches from IDA manifolds and reweldin to fit 40-48 under decklid of SB anyone woth any firsthand manifold experience please comment as I have thought of doing same for future engine expansion

quickest way to more HP is more CC's

[Russ Wolfe]

[tristessa]

[negawsklov17]

yeah, that hose was definitely a bitch, but i'm small, i could get it after a while. if anyone has any info on testing this component i would be much obliged. would just putting a different, working one on my car test it? i think so b ut i don't have an extra andi don't think they're cheap
maybei could borrow from someone sometime if nobody knows how to test the sensor.

About the dellortos, i think i have these longer manifolds because they're off my dad's 2 litre buggy so he doesn't care about height. i'll definitely get the shorter air cleaners so hopefully they'll fit. thanks for the help, i hope to not have to cut my luggage area, that would suck, ruin my *perfect* interior.

lol
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yup, i drive a porsche