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honky
Samba Member
Joined: August 10, 2006
Posts: 149
Location: Connecticut, USA
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 Posted: Sat Oct 21, 2006 8:46 am Post subject: charging issue |
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1974 THing 1600dp with Generator
Well I thought this was behind me but no. Put new brushes in the generator and a new battery. Voltage meter shows battery is charging and the test of the generator shows it is putting out well, but now I am getting a intermitant dull red light and the car hesitates taking off. Would think maybe the VR but could this be a bad ground or a short somewhere or ? |
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bucko
Samba Member
Joined: December 09, 2004
Posts: 2617
Location: Coppell, Texas
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| Posted: Sat Oct 21, 2006 5:18 pm Post subject: |
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Is it a "sealed" voltage regulator? If it has a screw holding the cover on (not "sealed"), remove the cover and use some emory cloth to clean up the contacts. Then try it again.
It does point to the Regulator (dull light). However, does the light go out when the engine revs up past idle? |
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honky
Samba Member
Joined: August 10, 2006
Posts: 149
Location: Connecticut, USA
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| Posted: Sun Oct 22, 2006 7:41 am Post subject: charging issue |
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| Thanks, I will try cleaning up the VR. If the generator light is on then it stays on no matter what. at other times it is gone completely. Seems to go away when the headlights are off. what about the coil, I know I can test for a good color spark at the center wire but what about after it has been running for awhile. |
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markie61
Samba Member
Joined: April 11, 2005
Posts: 583
Location: Northern Virginia
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| Posted: Sun Oct 22, 2006 8:41 am Post subject: |
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Fan belt slipping?
Recrimp/replace connections?
Mark
_________________
Whut is that-there Thang!?
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Chicks dig my Thing - so what if it's little and yellow...!? |
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honky
Samba Member
Joined: August 10, 2006
Posts: 149
Location: Connecticut, USA
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| Posted: Sun Oct 22, 2006 9:40 am Post subject: Connecticut buses to Washington 9.24 ? |
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| no fan belt is good. I had emmered all the ground and push on connections on the Vr and coil, carb generator. Will take the VR cover off today and clean up the points. I checked for short at the battery this am with my voltage meter between the ground post on the battery and the ground strap.. got nothng there but I wonder if this should be done with an amp meter to catch a small leak short. |
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honky
Samba Member
Joined: August 10, 2006
Posts: 149
Location: Connecticut, USA
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| Posted: Tue Oct 24, 2006 5:33 am Post subject: charging issue |
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| Well I think I found the problem, two wires coming to VR were worn through and leaning against the fan shroud causing a slight short. Since I fixed that the red light has gone away. Now if I could just get rid of the hesitation off idle things would be perfect. |
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markie61
Samba Member
Joined: April 11, 2005
Posts: 583
Location: Northern Virginia
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| Posted: Tue Oct 24, 2006 8:33 am Post subject: Re: charging issue |
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| honky wrote: |
| Now if I could just get rid of the hesitation off idle things would be perfect. |
If you have 34PICT3 carb + 009 disty = good luck!
Do a search on this and you will find GOBS of info about their incompatibility.
Mark
_________________
Whut is that-there Thang!?
------------------------------
Chicks dig my Thing - so what if it's little and yellow...!? |
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Ian Epperson
Samba Member
Joined: January 12, 2005
Posts: 2262
Location: Alameda, CA
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| Posted: Tue Oct 24, 2006 10:09 am Post subject: Re: charging issue |
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| markie61 wrote: |
| honky wrote: |
| Now if I could just get rid of the hesitation off idle things would be perfect. |
If you have 34PICT3 carb + 009 disty = good luck!
Do a search on this and you will find GOBS of info about their incompatibility.
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The best writeup I've seen is here:
http://www.aircooled.net/gnrlsite/resource/articles/distributor.htm
| Quote: |
| Early VW engines (pre-71') had no problem, but the smog engines when equipped with the 009/010 distributors had a pronounced and annoying "flat spot". A "flat spot" is a hesitation just off idle, and can range from being almost unnoticeable to getting broad-sided or rear-ended by approaching cars! |
| Quote: |
| Enter the SVDA distributor. A production VW distributor with the 009 advance curve (close enough), and a vacuum advance unit! Believe it or not, there is an additional advantage to the vacuum advance (on engines that have the proper vacuum port; 34 PICT series carbs), and that is the gain of 4 mpg improvement over the 009/010 distributor! Same performance, plus 4 mpg improved mileage, and NO FLAT SPOT. |
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honky
Samba Member
Joined: August 10, 2006
Posts: 149
Location: Connecticut, USA
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| Posted: Tue Oct 24, 2006 4:14 pm Post subject: carb issue |
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No actually I have the 34 pict4 and converted the existing dual vacuum( one advance, one retard) to SVDA by putting a new single vacuum pot on it . Didnt change anything. Still have the hesitation off idle and between gears. This is a list of some of the things I have done to try and solve the problem to no avail
new carb, Pertronix ignition, new gaskets and seals on the intake manifold, convert distributor to SVDA and cleaned and lubricated the existing dist so there is no doubt the centrifical is working fine, Checked and rechecked several times for vacuum leaks by spraying the motor down with starter fluid so now you could eat off it, retuned carb several times at different idle settings, timed to 30 degrees advance, checked fuel pump output(its good) new plugs, wires, dissy cap. What the FU am I missing here. Oh yea did not do a compression test yet Maybe the heads are leaking ? I am running out of things to check and recheck. Got any ideas out there ? |
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honky
Samba Member
Joined: August 10, 2006
Posts: 149
Location: Connecticut, USA
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| Posted: Tue Oct 24, 2006 4:31 pm Post subject: HEsssssssitation |
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One more observation. I notice now that it is getting colder when the car is running on choke that the hesitation dissipears. That tells me it it running lean. If I dont have a vacuum leak why would it run lean off idle ?
Is is a small leak that is not noticable with a leak test ? |
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Ian Epperson
Samba Member
Joined: January 12, 2005
Posts: 2262
Location: Alameda, CA
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| Posted: Tue Oct 24, 2006 6:57 pm Post subject: Re: carb issue |
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| honky wrote: |
| No actually I have the 34 pict4 and converted the existing dual vacuum( one advance, one retard) to SVDA by putting a new single vacuum pot on it . |
I didn't think that was possible. As I understand it, the SVDA uses vacume and centrifigal force to make the advance curve. If you were to remove the vacume port, it behaves identically to an 009.
A vacume-only advance (dual or single) would have a different curve.
| honky wrote: |
| when the car is running on choke that the hesitation dissipears |
When the choke is closed, there's a higher vacume (right?) which pulls stronger on the vacume-only advance. Do you have some way to adjust how sensative the advance is? Can you make it respond to less vacume? |
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honky
Samba Member
Joined: August 10, 2006
Posts: 149
Location: Connecticut, USA
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| Posted: Tue Oct 24, 2006 7:44 pm Post subject: hesitation |
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| reread my post, I converted to a single vacuum advance (off idle) and a centrifical advance. The distributor which is OG was dual vacuum and single centrifical advance. I just eliminated the second advance which was a retard advance . I would think eliminating one vacuum port off the carb would only help. At any rate the hesitation is still there as it was before changing. So I don't think the actions of the distributor are the problem. I am going to try messing with the accelerator pump some more. already tried pushing it up a notch so it sqirts asap. How about a weak spring in the assembly ? I am beginning to think this is a problem with this model carb. see alot of bitching about it on Samba. I am open to any ideas. The car is no fun to drive like this. |
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