| [ Total Views: 556 | Total Replies: 9 | Thread Id: 36345 ] |
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 73t3fastback
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| posted on March 16th, 2005 at 05:23 PM |
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Timing question
Ok, here's the situation
I have a '73 fastback, with a '71 EFI and a motor code that starts with U instead of X!!!!
My father and I have tried setting the timing as per various type 3 handbook but the car sounds rough and has no performance. There is a blue line on
the fan housing that if you line the timing up with that line, it runs beautifully (about 20 degrees advanced). The vacuum advance is working!!!!
Could someone explain this strange timing?????
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Andy
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| posted on March 16th, 2005 at 10:56 PM |
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Does sound strange. What dissy does it run? Stock VW?
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68AutoBug
A.k.a.: Lee Noonan
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| posted on March 16th, 2005 at 11:03 PM |
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Its been a long time since I owned a type 3 and then it had a carby...
I'll see what I can find out....
Lee
- [size=4]Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY--- [/size]
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Gracey
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| posted on March 17th, 2005 at 01:01 PM |
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Disconnect the vacuum line when setting or checking the timing.
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73t3fastback
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| posted on March 18th, 2005 at 11:44 AM |
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It has the stock EFI dissy running fine.
I have tried disconnecting the vacuum line but it is still the same
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Octa
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| posted on March 18th, 2005 at 01:22 PM |
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Are you sure it's a 71 motor? If it's a 72 the timming procedure is different. Does it have two vacumm lines coming off the dizzy? The bentley
has the procedure to time 72-73 engines, one step is to disconnect both lines. Also, this page has timming information with respect to your engine
number http://www.hallvw.clara.co.uk/type3ign.htm
I hope this helps.
EDIT: BTW, from what I can tell engine numbers beginning with X were only for Callifornia.
[Edited on 18-3-2005 by Octa]
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73t3fastback
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| posted on March 18th, 2005 at 04:51 PM |
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At the moment I'm not sure what type of motor is in it, but I do know it is a type 3 motor and the EFI came off a 71. There is only one vacuum hose
on it. But the timing marks don't match up. If the timing marks line up the engine runs rough but when the timing is about 20 degrees to the left it
is fine?????
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Octa
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| posted on March 21st, 2005 at 09:50 AM |
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| Quote: | O... There is
only one vacuum hose on it. But the timing marks don't match up. If the timing marks line up the engine runs rough but when the timing is about 20
degrees to the left it is fine?????
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If there is one vacuum hose then it should be 71 and under. Have you adjusted your valves prior to doing the timming?
'We teach best what we most need to learn'
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Midlife crisis
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| posted on March 21st, 2005 at 10:49 AM |
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Is the Dissy the one for that FI system? As they did change from model to model.
Marc
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73t3fastback
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| posted on March 21st, 2005 at 08:03 PM |
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Looks like i'll need to pull the dissy off the old wreck then
Thanks for all you help
Kieran
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