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Tram
Samba Socialist
Joined: May 02, 2003
Posts: 23022
Location: Northwest of Normal
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 Posted: Mon Oct 30, 2017 9:08 pm Post subject: Re: 1976 fuel injection problem |
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| Wildthings wrote: |
| Tram wrote: |
| vw_bud wrote: |
| Oh and thanks up above for the info on the afm with the screw driver I'll give it a go and if it does work what would be the correction? |
There's a spring tension adjustment for the flap under the plastic AFM cap. You'll need to move it a click at a time till it runs the pump as it flaps when cranking. Count how many clicks so you can "get back home again" if necessary.
Then you'll need to reset your CO value but you really need an exhaust sniffer for that.
This was never an authorized repair- the authorized repair was replace your airflow meter, but all us techs were cheap!  |
He's just talking about using a pencil or wooden dowel (either is preferred over a screw driver) to open the door in the AFM, not adjusting it. |
I was responding to this:
I'll give it a go and if it does work what would be the correction?
_________________
Немає виправдання для війни! Я з Україною.
| Bryan67 wrote: |
| Just my hands. And a little lube. No tools. |
Those who can- do.
Those who can't? Subaru. |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 52739
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| Posted: Mon Oct 30, 2017 10:03 pm Post subject: Re: 1976 fuel injection problem |
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| Tram wrote: |
| Wildthings wrote: |
| Tram wrote: |
| vw_bud wrote: |
| Oh and thanks up above for the info on the afm with the screw driver I'll give it a go and if it does work what would be the correction? |
There's a spring tension adjustment for the flap under the plastic AFM cap. You'll need to move it a click at a time till it runs the pump as it flaps when cranking. Count how many clicks so you can "get back home again" if necessary.
Then you'll need to reset your CO value but you really need an exhaust sniffer for that.
This was never an authorized repair- the authorized repair was replace your airflow meter, but all us techs were cheap! |
He's just talking about using a pencil or wooden dowel (either is preferred over a screw driver) to open the door in the AFM, not adjusting it. |
I was responding to this:
I'll give it a go and if it does work what would be the correction? |
In that case the correction would be bending the one contact some so that the points that trigger the fuel pump relay will close. |
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Tram
Samba Socialist
Joined: May 02, 2003
Posts: 23022
Location: Northwest of Normal
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| Posted: Mon Oct 30, 2017 10:24 pm Post subject: Re: 1976 fuel injection problem |
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| Wildthings wrote: |
| Tram wrote: |
| Wildthings wrote: |
| Tram wrote: |
| vw_bud wrote: |
| Oh and thanks up above for the info on the afm with the screw driver I'll give it a go and if it does work what would be the correction? |
There's a spring tension adjustment for the flap under the plastic AFM cap. You'll need to move it a click at a time till it runs the pump as it flaps when cranking. Count how many clicks so you can "get back home again" if necessary.
Then you'll need to reset your CO value but you really need an exhaust sniffer for that.
This was never an authorized repair- the authorized repair was replace your airflow meter, but all us techs were cheap! |
He's just talking about using a pencil or wooden dowel (either is preferred over a screw driver) to open the door in the AFM, not adjusting it. |
I was responding to this:
I'll give it a go and if it does work what would be the correction? |
In that case the correction would be bending the one contact some so that the points that trigger the fuel pump relay will close. |
Ummm... it's not supposed to be closed all the time, just when the flap starts agitating as it's cranked.
_________________
Немає виправдання для війни! Я з Україною.
| Bryan67 wrote: |
| Just my hands. And a little lube. No tools. |
Those who can- do.
Those who can't? Subaru. |
|
| Back to top |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 52739
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| Posted: Mon Oct 30, 2017 10:32 pm Post subject: Re: 1976 fuel injection problem |
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| Tram wrote: |
| Wildthings wrote: |
| Tram wrote: |
| Wildthings wrote: |
| Tram wrote: |
| vw_bud wrote: |
| Oh and thanks up above for the info on the afm with the screw driver I'll give it a go and if it does work what would be the correction? |
There's a spring tension adjustment for the flap under the plastic AFM cap. You'll need to move it a click at a time till it runs the pump as it flaps when cranking. Count how many clicks so you can "get back home again" if necessary.
Then you'll need to reset your CO value but you really need an exhaust sniffer for that.
This was never an authorized repair- the authorized repair was replace your airflow meter, but all us techs were cheap! |
He's just talking about using a pencil or wooden dowel (either is preferred over a screw driver) to open the door in the AFM, not adjusting it. |
I was responding to this:
I'll give it a go and if it does work what would be the correction? |
In that case the correction would be bending the one contact some so that the points that trigger the fuel pump relay will close. |
Ummm... it's not supposed to be closed all the time, just when the flap starts agitating as it's cranked. |
Didn't say or imply that they would be closed all the time. Where are you coming up with this? |
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Tram
Samba Socialist
Joined: May 02, 2003
Posts: 23022
Location: Northwest of Normal
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| Posted: Mon Oct 30, 2017 11:35 pm Post subject: Re: 1976 fuel injection problem |
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| Wildthings wrote: |
| Tram wrote: |
| Wildthings wrote: |
| Tram wrote: |
| Wildthings wrote: |
| Tram wrote: |
| vw_bud wrote: |
| Oh and thanks up above for the info on the afm with the screw driver I'll give it a go and if it does work what would be the correction? |
There's a spring tension adjustment for the flap under the plastic AFM cap. You'll need to move it a click at a time till it runs the pump as it flaps when cranking. Count how many clicks so you can "get back home again" if necessary.
Then you'll need to reset your CO value but you really need an exhaust sniffer for that.
This was never an authorized repair- the authorized repair was replace your airflow meter, but all us techs were cheap! |
He's just talking about using a pencil or wooden dowel (either is preferred over a screw driver) to open the door in the AFM, not adjusting it. |
I was responding to this:
I'll give it a go and if it does work what would be the correction? |
In that case the correction would be bending the one contact some so that the points that trigger the fuel pump relay will close. |
Ummm... it's not supposed to be closed all the time, just when the flap starts agitating as it's cranked. |
Didn't say or imply that they would be closed all the time. Where are you coming up with this? |
Bending it to make contact sounded kinda permanent to me. Never mind. Carry on.
_________________
Немає виправдання для війни! Я з Україною.
| Bryan67 wrote: |
| Just my hands. And a little lube. No tools. |
Those who can- do.
Those who can't? Subaru. |
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vw_bud
Samba Member
Joined: March 23, 2008
Posts: 272
Location: Bradford, PA
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| Posted: Thu Nov 02, 2017 6:26 pm Post subject: Re: 1976 fuel injection problem |
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| Ok so I tried bending the contact slightly...noticed an ".030" on the gear tooth didn't adjust it though but watched it switch on and off when cranking still no response from fuel pump. Does anyone have a pic of the prong set up on the fuel pump relay? But if I poured fuel into the intake boot and crank it does start and run nice til it runs out so fuel,spark, compression , timing is good |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 52739
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| Posted: Thu Nov 02, 2017 7:28 pm Post subject: Re: 1976 fuel injection problem |
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Does the double relay click when you turn the key to the "run" position?
The black wire with the inline fuse in it, needs to be hooked up to the #15 side of the coil for the Fuel Injection half of the Double Relay to close. |
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vw_bud
Samba Member
Joined: March 23, 2008
Posts: 272
Location: Bradford, PA
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| Posted: Thu Nov 02, 2017 11:49 pm Post subject: Re: 1976 fuel injection problem |
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| The relay is up front of vehicle next to turn signal relay? Because I turn the key and nothing no click but at ignition coil app wires are present. Unless you mean inline fuse under steering column |
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poptop tom
Samba Member
Joined: July 27, 2004
Posts: 1607
Location: The Hoosier State
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 52739
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| Posted: Fri Nov 03, 2017 6:42 am Post subject: Re: 1976 fuel injection problem |
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| vw_bud wrote: |
| The relay is up front of vehicle next to turn signal relay? Because I turn the key and nothing no click but at ignition coil app wires are present. Unless you mean inline fuse under steering column |
The double relay contains two relays, 1. the fuel injection relay and 2. the fuel pump relay. If the fuel injection relay isn't closing you are going anywhere, the relay is triggered by the black wire that attaches to the #15 side of the coil. The relay also needs a good ground connection.
Put your fingers on the double relay and have your significant other turn the ignition switch on and off. |
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vw_bud
Samba Member
Joined: March 23, 2008
Posts: 272
Location: Bradford, PA
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| Posted: Fri Nov 03, 2017 7:44 am Post subject: Re: 1976 fuel injection problem |
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| Ok I removed pump hooked it to a battery and it works well..the only down side now I'm waiting for the battery from the bus to be charged...I located the relay and in case it's bad I have a 78 bus waiting for an engine build that got swapped to carb with a relay still bolted to the firewall lol |
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tommu 
Samba Member
Joined: November 15, 2011
Posts: 665
Location: L.A.
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 52739
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| Posted: Fri Nov 03, 2017 1:29 pm Post subject: Re: 1976 fuel injection problem |
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| tommu wrote: |
I would avoid any adjustments in the AFM at least until it's running. Even when it's running fix everything else before looking into the AFM.
Good luck! |
2X, the AFM doesn't tend to go out of tune. I never once popped the lid on the AFM on my '91 Vanagon over the 240K mile life of the WBXer engine and nor on my '87 Syncro in just under 300K. Very dependable item if one keeps their grubby paws away from it. |
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vw_bud
Samba Member
Joined: March 23, 2008
Posts: 272
Location: Bradford, PA
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| Posted: Fri Nov 10, 2017 1:30 pm Post subject: Re: 1976 fuel injection problem |
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| It runs you guys are awesome...now he has a leak at the number 4 injector from the little bit of hose to the fuel rail is that easily replaced or is it attached to the injector? |
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 52739
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| Posted: Fri Nov 10, 2017 2:26 pm Post subject: Re: 1976 fuel injection problem |
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| vw_bud wrote: |
| It runs you guys are awesome...now he has a leak at the number 4 injector from the little bit of hose to the fuel rail is that easily replaced or is it attached to the injector? |
The hoses need to be replace occasionally with FI rated hose (30r9 or equivalent) if it doesn't say something like "Suitable For Fuel Injection" on it then don't run it. The hose usually has to be cut off the injectors and the collar removed. You need to come up with the proper fuel injection clamps instead of standard hardware store screw clamps. If the rest of the hoses are still original you need to replace them too, even if they look good still the original hoses are an engine fire waiting to happen. |
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vw_bud
Samba Member
Joined: March 23, 2008
Posts: 272
Location: Bradford, PA
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| Posted: Thu Nov 16, 2017 5:48 am Post subject: Re: 1976 fuel injection problem |
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| Ok went to local vw shop luckily I'm cool with the owner he gave me three injectors for $10 to try and showed me how to "fix" them by talking the metal collar off and fitting a suitable hose and it's good to go and I have spares lol but it runs great with the og injector but after warm up gets kinda rough idle...after all that bad fuel is still mixed with the new I'm thinking stp treatment then a tune up points,plugs etc. But it does stay running and very good throttle response |
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tommu
Samba Member
Joined: November 15, 2011
Posts: 665
Location: L.A.
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| Posted: Fri Nov 17, 2017 1:30 pm Post subject: Re: 1976 fuel injection problem |
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Vacuum leaks are very common. I could only eradicate all of mine by testing with a smoke tester. Doing it by sight is guessing and using carb cleaner wasn’t very effective for me. Don’t forget to check the brake booster!
How do the plugs look after a good drive?
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vw_bud
Samba Member
Joined: March 23, 2008
Posts: 272
Location: Bradford, PA
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| Posted: Wed Nov 22, 2017 3:07 am Post subject: Re: 1976 fuel injection problem |
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| Ok after a nice warm up I took it for a ride did fine didn't miss a beat I can see why people like the fi set up he just needs more fuel now lol |
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