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drewjamiesonjr
Samba Member
Joined: February 06, 2017
Posts: 16
Location: St. Thomas, ON (South of London, ON)
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 Posted: Mon Oct 16, 2017 7:37 pm Post subject: Need Help - Fuel Line Components Identification |
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I have a 1978 FI Microbus. I'm in the process of troubleshooting an engine stall after about 2 minutes of run time.
As part of that, I am going to change the fuel filter. When I went underneath to check out the fuel filter, I noticed what may be a fuel related line that is not connected to anything. It is visible in the picture sitting just above the filter. Who knows what that line is and where it should go?
You can see the origin of the unknown and unconnected line in the picture below. It seems to exit the fuel tank right next to the line that runs into the filter.
There is also another line that runs from the tank and I believe enters the engine bay. I'm assuming that is some sort of overflow line? Can anyone confirm that for me?
And finally, and unconnected, if you look at the following picture (which actually ended up upside down), I need to identify two things. First, is the hole that appears just slightly right of centre in the picture. What the hell is that?
And second, there is some sort of spring with potentially some sort of ground wire connected to it (and not grounded). Anyone know what that is?
As always, any help is appreciated.
Drew |
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BayCreamPuff
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Joined: August 10, 2015
Posts: 769
Location: Oakland, CA
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| Posted: Mon Oct 16, 2017 8:17 pm Post subject: Re: Need Help - Fuel Line Components Identification |
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| drewjamiesonjr wrote: |
| When I went underneath to check out the fuel filter, I noticed what may be a fuel related line that is not connected to anything. It is visible in the picture sitting just above the filter. Who knows what that line is and where it should go? |
This is your original metal fuel line that ran from the tank to the filter. It most likely sprung a leak due to all that rust on it and someone ran a rubber fuel line in its place.
| drewjamiesonjr wrote: |
| There is also another line that runs from the tank and I believe enters the engine bay. I'm assuming that is some sort of overflow line? Can anyone confirm that for me? |
This is your fuel return line. It connects to the fuel pressure regulator on the other side of the tin in the engine compartment.
| drewjamiesonjr wrote: |
| And second, there is some sort of spring with potentially some sort of ground wire connected to it (and not grounded). Anyone know what that is? |
The spring and cable are for your engine cooling flaps. The cable connects to the thermostat mounted to the side of the block that opens up once the engine is warm allowing cool air to flow over the heads and oil cooler.
You should replace all of those fuel lines and clamps (including the rusty metal lines)
_________________
Cream Puff
'79 CA Stock FI Deluxe Campmobile
Earl Grey
'87 GoWesty 2.2 Westfalia
Marsha Mellow
'00 Eurovan VR6 Full Camper |
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Wildthings
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Joined: March 13, 2005
Posts: 50338
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| Posted: Mon Oct 16, 2017 9:47 pm Post subject: Re: Need Help - Fuel Line Components Identification |
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| You are missing at least one of the little flat retainers for the flap operating rod. i Suspect there are several other piece of the thermostat system that will be missing as well. People don't understand (or care about) the thermostat system, but if you are driving in cooler weather a working thermostat will make a big difference in gas mileage and in engine life. |
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Tcash
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Joined: July 20, 2011
Posts: 12844
Location: San Jose, California, USA
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Wildthings
Samba Member
Joined: March 13, 2005
Posts: 50338
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| Posted: Tue Oct 17, 2017 10:20 am Post subject: Re: Need Help - Fuel Line Components Identification |
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I personally hate the way VW ran fuel line over top of the starter, especially metal fuel line. When you replace the rubber fuel hoses, I would get rid of any and all of the metal line that VW used where possible. If the manifold that deliver fuel to the injectors are as rusty as the stuff in your pictures, you should find clean rust free replacements. A GASOLINE FIRE WILL RUIN YOUR DAY. Adding a spring loaded check valve to your fuel return line is a good idea as well, you don't want fuel backflowing through the return in case of a fire.
This is a picture of the check valve I installed on the return line of my 83 1/2 Vanagon, one installed on a Bay would be similar.
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