Timing question

30 posts · joined Feb 2003 · 16 Mar 2005, 5:23 pm

#319971

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?????

Andy Andy\'s Adventures

2,820 posts · joined Nov 2002 · 16 Mar 2005, 10:56 pm

#320328

Does sound strange. What dissy does it run? Stock VW?

68AutoBug Beetle Restorer - Experience over 138\% - YIKES --

11,654 posts · joined Aug 2002 · 16 Mar 2005, 11:03 pm

#320340

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

- Helping keep Air Cooled VWs on the road - location: SCONE in the Upper Hunter Valley - Northern NSW 320 kms NNW of SYDNEY---

Gracey Wolfsburg Wizard

511 posts · joined Feb 2003 · 17 Mar 2005, 1:01 pm

#320632

Disconnect the vacuum line when setting or checking the timing.

73t3fastback Casual Dubber

30 posts · joined Feb 2003 · 18 Mar 2005, 11:44 am

#321191

It has the stock EFI dissy running fine.

I have tried disconnecting the vacuum line but it is still the same

Octa veedub recluse

406 posts · joined Mar 2005 · 18 Mar 2005, 1:22 pm

#321278

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]

'We teach best what we most need to learn'

VW no more... sigh.... well, at least it's a cousin

73t3fastback Casual Dubber

30 posts · joined Feb 2003 · 18 Mar 2005, 4:51 pm

#321446

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?????

Octa veedub recluse

406 posts · joined Mar 2005 · 21 Mar 2005, 9:50 am

#322709

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?????

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'

VW no more... sigh.... well, at least it's a cousin

Midlife crisis Nartispuddlejumper, Bureau of Toxicity

2,282 posts · joined May 2003 · 21 Mar 2005, 10:49 am

#322723

Is the Dissy the one for that FI system? As they did change from model to model.

Marc

If you can't laugh at yourself you can't laugh at anyone else! Because life is to short not to LAUGH

73t3fastback Casual Dubber

30 posts · joined Feb 2003 · 21 Mar 2005, 8:03 pm

#323044

Looks like i'll need to pull the dissy off the old wreck then

Thanks for all you help

Kieran