bkautzman
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Type: 76 transporter
Name: Clyde
Posts: 6
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« on: November 18, 2007, 05:21:41 PM » |
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Hi, I am new to this forum and am glad I found it. I am not new to VW buses, I have owned 5 and currently have three. My question is; I have brought a '76 bus back to life after being dormant for many years. This bus has fuel injection which I know very little about. My bus will start and run but will not idle down. It stays in the hyper idle all the time. The 1600 was easy to tinker with but I could use some direction with this newer engine. Thanks
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Wizzard
Grand Poobah
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Location: Fresno , CA
Type: '71 Deluxe
Name: The Magic Bus
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Cruisin' in the Magic Bus
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« Reply #1 on: November 18, 2007, 07:54:02 PM » |
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I'm not able to answer your question . However I certainly wish to  you to LMB . Best regards,  |
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People are like flowers , and I want to thank you for letting me walk thru your garden .
...... Lord Buckley
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bus71
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« Reply #2 on: November 18, 2007, 10:31:59 PM » |
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"Fixing old crap since 1965"
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BeetleWarrior
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« Reply #3 on: November 19, 2007, 03:45:28 AM » |
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to LMB bkautzman, Have you checked your vacuum hose connections and throttle valve positioner yet?
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Terry '73 Std Bug '73 Westy '91 T4R • Support Vehicle (AKA Daily Driver) TexasAirCoolers.Com • Texas Coalition of Buses |
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Dj:Eep
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Location: In a bus, Oregonia USA
Type: '71 GhettoDeluxe, '79 FosterSunRoof
Name: Navin & Franklin
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I think I brained my damage.
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« Reply #4 on: November 19, 2007, 08:05:25 AM » |
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Is the AFM hooked up?
I had this problem on a '77 I was working on for a friend. AFM hooked up=nothing. AFM unhooked=3000rpm idle.
Turned out to be the brake booster hose. It had come off, hidden by the Cold Start valve connection. What was happening was, with the AFM disconnected, it was getting "Full load" (wide open throttle) signal to the FI, and using the big vacuum leak as the "intake." Boom a very rich 3000prm.
Check all vacuum connections carefully, twice. Then start testing electrical things per the manual.
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DjEep goes "bump" in the night. :eeps_club:
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bkautzman
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Type: 76 transporter
Name: Clyde
Posts: 6
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« Reply #5 on: November 19, 2007, 10:47:13 AM » |
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Thanks for the , it is much appreciated. I looked at my brake booster hose and it appears to be connected and still sturdy. I am replacing hoses one by one, they are pretty old. Could my aux air reg or decel valve be bad? |
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bullirider
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Type: Eurovan MV, Year 1993
Name: Bulli
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« Reply #6 on: November 19, 2007, 11:11:17 AM » |
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Sorry, i can't help you. So I say to the Forum. Best regards from South Germany  Garry |
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I am member with T4 forum and Busbekloppte.de |
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Dj:Eep
LMB Resident DJ/WiseAss
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LoveMyBus SuperSecret Agent
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Location: In a bus, Oregonia USA
Type: '71 GhettoDeluxe, '79 FosterSunRoof
Name: Navin & Franklin
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I think I brained my damage.
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« Reply #7 on: November 19, 2007, 03:23:19 PM » |
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They could be. Definitely sounds like a vacuum leak. I'm can't remember how to check 'em off the top of my head, but I'll look into it for ya.
Does it backfire when it is doing this?
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DjEep goes "bump" in the night. :eeps_club:
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bkautzman
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Type: 76 transporter
Name: Clyde
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« Reply #8 on: November 19, 2007, 05:42:55 PM » |
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Back fire...yes. I appreciate your time. The gas mileage is off the charts bad...
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Dj:Eep
LMB Resident DJ/WiseAss
Global Moderator
LoveMyBus SuperSecret Agent
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Location: In a bus, Oregonia USA
Type: '71 GhettoDeluxe, '79 FosterSunRoof
Name: Navin & Franklin
Posts: 2384
I think I brained my damage.
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« Reply #9 on: November 20, 2007, 10:13:02 PM » |
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The thing about FI is that the fuel and intake systems are almost entirely separate, so you have to think: How is it getting air, and why is it getting fuel.
Simple things first:
New condenser and points, precisely gapped, or good electronic points replacement? FI really likes a clean dwell, it is what times the injector pulses.
Valves and rings? Gonna need a nice, clean vacuum signal (once all the holes are plugged) to control everything, so be sure that .006 is perfect, and compression is good.
Timing? What kind of distributor is on there? Is the vac pot functioning? Got a steady Spark?
Did you double check all the connections on the harness? AFM? the resistors and double relay? head temp sensor?
Also, got some pics of the engine?
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DjEep goes "bump" in the night. :eeps_club:
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bkautzman
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Type: 76 transporter
Name: Clyde
Posts: 6
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« Reply #10 on: November 25, 2007, 07:06:37 AM » |
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Been pretty busy with the holidays and all. I will do like you said and run it all down. I have all the books and manuals to draw wisdom from on my journey. I will keep you posted and will posts pictures as they come available. I sure enjoy being behind the wheel of a bus again. Thanks again.  Happy motoring.  |
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Dj:Eep
LMB Resident DJ/WiseAss
Global Moderator
LoveMyBus SuperSecret Agent
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Location: In a bus, Oregonia USA
Type: '71 GhettoDeluxe, '79 FosterSunRoof
Name: Navin & Franklin
Posts: 2384
I think I brained my damage.
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« Reply #11 on: November 25, 2007, 08:45:50 AM » |
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DjEep goes "bump" in the night. :eeps_club:
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bus71
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« Reply #12 on: November 26, 2007, 12:40:49 PM » |
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Sometimes temp sensor #2 loosens up or goes bad. It is located near #3 cyl. Make sure all wiring is snug and clean, especialy grounds.  |
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"Fixing old crap since 1965"
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bkautzman
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Type: 76 transporter
Name: Clyde
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« Reply #13 on: November 28, 2007, 03:54:57 AM » |
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I'll look into that....thanks. Nothing like bringing to life an old bus. I love the smell of gas/grease in the morning.
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