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rproskey Samba Member
Joined: August 05, 2009 Posts: 36
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Posted: Wed Aug 12, 2009 9:53 am Post subject: '83 Vanagon Air-cooled cranks but does not fire up- |
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Hello-
I have read a lot of the archives about this problem but I still cannot get my van started.
I changed the fuel pump and filter. There is gas in the fuel rail. I have spark coming out of the spark plug wires. There is gas in the tank. My AFM switch is working properly. I cannot find the Cold Start Valve... anyone know where it is located or have a pic? the double relays appear to be working properly. I have voltage at the fuel pump when I turn the key on and when the engine cranks.
Please help!
Thanks-
Ray |
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mightyart Samba Member
Joined: March 24, 2004 Posts: 6188 Location: Portland, Oregon
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rproskey Samba Member
Joined: August 05, 2009 Posts: 36
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Posted: Wed Aug 12, 2009 10:42 am Post subject: |
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Great reply! That answered a lot of my questions. I noticed that my Temp Sensor is broken off and not connected. Could this be the issue why mine won't start?
Thanks. I will be back!!! |
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Randy in Maine Samba Member
Joined: August 03, 2003 Posts: 34890 Location: The Beach
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Posted: Wed Aug 12, 2009 11:54 am Post subject: |
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Yes it could. You need to resolve that issue first. |
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rproskey Samba Member
Joined: August 05, 2009 Posts: 36
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Posted: Wed Aug 12, 2009 4:53 pm Post subject: |
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OK. That was the problem with it not starting up! Now it starts but it quickly dies out (3-4 seconds). I need to change the spark plugs and wires, hopefully that will help.
Any idea what could keep it from running?
Thanks for the help so far! |
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Randy in Maine Samba Member
Joined: August 03, 2003 Posts: 34890 Location: The Beach
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Posted: Wed Aug 12, 2009 6:53 pm Post subject: |
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Here is how it works.
When the key is in the "start" position, the fuel pump runs off the starter via the double realy. After the engine starts, the fuel pump is run off the little microswitch inside the AFM unit (via the little flap in there) nd the other sie of the double relay.
Start by cleaning and tightening the connections at the starter and the connections at the double relay. While youare doign that, aslo do the battery connections and the chassis ground strap.
Make sure the little flap inside the AFM is free to "swing".
Here is how the double relay works and how to test it.
http://itinerant-air-cooled.com/viewtopic.php?t=54...highlight= |
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rproskey Samba Member
Joined: August 05, 2009 Posts: 36
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Posted: Wed Aug 12, 2009 7:01 pm Post subject: |
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What makes the flap in the AFM "swing"? I know it is air flow, but is it air being sucked into the engine?
I need to do my ground straps also. The tranny/frame strap is in bad condition. Where is the strap from the engine to the frame? |
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rproskey Samba Member
Joined: August 05, 2009 Posts: 36
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Posted: Thu Aug 13, 2009 9:14 am Post subject: |
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Where is the ground strap located that connects the engine to the frame? Is it accesible from the engine bay or from below? I cannot seem to find one. I found the tranny/frame strap underneath... but no engine strap.
Thanks you!
Ray
Or, if possible, a picture of where it is! Thanks! |
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rproskey Samba Member
Joined: August 05, 2009 Posts: 36
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Posted: Thu Aug 13, 2009 1:49 pm Post subject: |
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OK. Here is the problem I found.
The engine will start but it will not stay running. I opened the AFM to watch the flapper move. From what I understand, the flapper must move (fluctuate) to keep the contact closed for the fuel pump to run. My flapper is not moving while the engine is trying to run. I can hold the throttle open and then the flapper will begin to move, but as soon as I let off, the flapper will stop moving and open the circuit to the fuel pump.
Question: Why won't the flapper in the AFM suck enough air to move without me manually moving the throttle?
Thanks people!!!
PS. The flapper moves freely. |
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Randy in Maine Samba Member
Joined: August 03, 2003 Posts: 34890 Location: The Beach
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rproskey Samba Member
Joined: August 05, 2009 Posts: 36
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Posted: Thu Aug 13, 2009 6:02 pm Post subject: |
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The double relay is working. The flap in the AFM is not moving. I'm trying to figure out why no air is being pulled across the flap.
Thanks for the article on the relays Randy! That's going in my Vanagon binder!
OH! Where can I get vacuum hoses? A few of mine are shot and so are the 90degree boots. |
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reluctantartist Samba Member
Joined: August 13, 2006 Posts: 1927 Location: Bloomington, IN
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Posted: Thu Aug 13, 2009 8:31 pm Post subject: |
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The usual places for the rubber stuff....Bus Depot, Go Westy, CIP1, Bus Boys...a few others I can;t recall off hand. You can get the hoses at your local flaps, but make sure you bring the old one with you. If your vacuum hoses are really bad that may be a big part of your current trouble. _________________ 1982 Westy, 1974 412 Variant... Yes, Aircooled's are great! Oh and I do have modern computer controlled vehicles too, but I just don't care about them. |
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rproskey Samba Member
Joined: August 05, 2009 Posts: 36
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Posted: Fri Aug 14, 2009 9:30 am Post subject: |
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By the way... what is a flaps store? Is it an acronym for something? |
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shadetreemech Samba Member
Joined: October 05, 2005 Posts: 777 Location: Claremont, CA
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Posted: Fri Aug 14, 2009 9:34 am Post subject: |
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Friendly Local Auto Parts Store
_________________ '84 GL 1.9
'01 Volvo V70 T5
'88 Westy - "MZDRTHY" |
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mightyart Samba Member
Joined: March 24, 2004 Posts: 6188 Location: Portland, Oregon
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rproskey Samba Member
Joined: August 05, 2009 Posts: 36
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Posted: Fri Aug 14, 2009 1:08 pm Post subject: |
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HAH! That is a good one! Friendly??? Kidding! |
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