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Tom70
Samba Member
Joined: May 28, 2013
Posts: 5
Location: Montreal, Canada
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 Posted: Fri May 16, 2014 5:16 pm Post subject: Could this cause my problem? |
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Hi
On my 70 Ghia I am getting hesitation running at 45 mph. I have rebuilt the carb (30 pict 3) and the vacuum advance seems fine. It starts and runs fine around town but out on the open road is when I have problems.
There is this "thing" which is hosed between the carb and the intake manifold. Can some one tell me what this part does.
Any suggestions to fix my dilemma will be appreciated.
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motorhead364
Samba Member
Joined: November 04, 2008
Posts: 715
Location: Amarillo Texas
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| Posted: Fri May 16, 2014 5:34 pm Post subject: |
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This is a wild guess out of the blue but if it's a vacuum actuator of some kind it could be opening at high way rpm and if the diaphragm is torn it could then start sucking air causing the stumbling.
Back out a little and take a couple picks of where it's connected to the motor.
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63 ghia coupe |
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Tom70
Samba Member
Joined: May 28, 2013
Posts: 5
Location: Montreal, Canada
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| Posted: Fri May 16, 2014 6:02 pm Post subject: |
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Here you go
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Kmolenda
Samba Member
Joined: June 18, 2013
Posts: 309
Location: Cottage Grove Mn
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| Posted: Fri May 16, 2014 6:37 pm Post subject: |
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| Not sure what it is, but the previous post is probably correct. Disconnect it and plug the port on the intake. I bet it runs much better. |
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aero3113
Samba Member
Joined: March 03, 2013
Posts: 196
Location: Setauket, NY (Long Island)
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| Posted: Fri May 16, 2014 6:53 pm Post subject: |
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| I'm not 100% but I think it is there to make adjustments with changes in elevation. |
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motorhead364
Samba Member
Joined: November 04, 2008
Posts: 715
Location: Amarillo Texas
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| Posted: Fri May 16, 2014 7:46 pm Post subject: |
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Still have no clue what that could be. Run down to the local parts store and get two vacuum port plugs. 1/8th inch I believe and take the hoses off and put the plugs on and go for a drive. Should line out.
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63 ghia coupe |
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John Moxon 
Samba Moderator
Joined: March 07, 2004
Posts: 13952
Location: Southampton U.K.
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oceanair
Samba Member
Joined: June 09, 2013
Posts: 720
Location: Victoria, BC
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| Posted: Sat May 17, 2014 7:55 am Post subject: |
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| That is for adjusting for altitude -- read it up in the orange Bentley manual. I doubt that is the problem. Where does your timing top out, what degree? Is this at 45 MPH in 3rd (high revs) or in 4th gear? |
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OLD VW NUT
Samba Member
Joined: February 23, 2011
Posts: 2776
Location: High Desert of Washington 98823
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| Posted: Sat May 17, 2014 9:01 am Post subject: |
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Get that fuel filter away from the dist wires. With a small air gap and a spark shorting across the vapor filled filter you've got a small bomb in the making! Best place for the filter is in front of the firewall tin. I.E. out of the engine compartment.
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71 Ghia Coupe - stock body - no rust! Powered by a 2110 W/Dual HPMX 44's - Rancho Pro Street Transaxle - A/C by Gilmore
Other car - 2013 VW Golf TDI |
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Era Vulgaris
Samba Member
Joined: August 22, 2012
Posts: 1677
Location: Raleigh, NC
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| Posted: Sun May 18, 2014 2:09 pm Post subject: |
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| OLD VW NUT wrote: |
| Get that fuel filter away from the dist wires. With a small air gap and a spark shorting across the vapor filled filter you've got a small bomb in the making! Best place for the filter is in front of the firewall tin. I.E. out of the engine compartment. |
I agree. Seems like almost all the type 1's I see for sale with a "newly rebuilt motor", or even some old tired cars, have a filter between the fuel pump and carb like that. I don't know where this school of thought is coming from that so many people are doing that, but it's really a bad idea.
I wasn't alive when these cars were in production, but I've had loads of people who were around when these cars were new start conversations with me about the Ghias or Beetles they had when they were young. There's an alarmingly significant percentage of them that say they lost their car because it caught fire. Just sayin!
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Currently own:
66 Karmann Ghia, L390 Gulf Blue, under construction, here: www.thesamba.com/vw/forum/viewtopic.php?t=760505&highlight=
99 Mazda MX-5 10AE, Sapphire Blue Mica, 6 speed, LSD
Previously owned:
98 Porsche Boxster, silver, 2.5L -- 67 Karmann Ghia, Black, 1500sp -- 98 BMW Z3, Atlanta Blue Metallic, 2.8L I6 -- 75 Porsche 914, Laguna Blue, 2270cc -- 72 Porsche 914, Signal Orange, 1.7 FI -- 74 Karmann Ghia, Black, 1600dp -- 74 Triumph TR6 with O.D., sapphire blue |
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Altema
Samba Member
Joined: June 20, 2010
Posts: 2904
Location: Lower Michigan
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| Posted: Sun May 18, 2014 4:26 pm Post subject: |
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The altitude adjuster is missing a component according to the picture below. If the other tests don't resolve the issue and you want to rule out the altitude adjuster, then disconnect the hose from the carb and the intake manifold and cap them. Don't bother the other hoses, just the ones for the adjuster. If the problem goes away, you found it. If not, then you'll need to look elsewhere.
The fuel filter gets put there because it's easy to get to. It looks like it belongs there, but it's about the worst possible location. Like mentioned, move the filter next to the transmission or under the fuel tank in front. Replace the fuel line with proper fuel line hose, and if you can't get the German Braid style, then clamp everything. The braided covering on the original lines works like a Chinese finger-trap, and grips tighter the harder it gets pulled on. Some people put clamps on the braided lines too, just as an extra measure of safety.
Paul
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Tom70
Samba Member
Joined: May 28, 2013
Posts: 5
Location: Montreal, Canada
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| Posted: Tue May 27, 2014 7:07 pm Post subject: |
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Thanks for all the info.
It is timed at 5° ATDC, disconected the altitude adjuster, cleaned and reset the points to .025.
Still farted around.
Finally changed the coil and voila it is running fine.
PS. Moved the fuel filter too |
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swavananda
Samba Member
Joined: February 14, 2009
Posts: 889
Location: Can o' Scruz
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| Posted: Tue May 27, 2014 7:48 pm Post subject: |
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| Tom70 wrote: |
cleaned and reset the points to .025.
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????
Points are usually set to .016 . With a dwell reading around 47* +/- a few.
And just to be sure you know , Set points before timing. |
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KGCoupe
Samba Member
Joined: July 01, 2005
Posts: 3580
Location: Putting the "ill" and "annoy" in Illinois
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| Posted: Tue May 27, 2014 8:36 pm Post subject: |
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| swavananda wrote: |
| Tom70 wrote: |
cleaned and reset the points to .025.
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????
Points are usually set to .016 . With a dwell reading around 47* +/- a few.
And just to be sure you know , Set points before timing. |
... or if you're doing it old school on the side of the road, points can be set by using a matchbook cover as a feeler gauge.  |
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Woreign
Samba Member
Joined: June 04, 2006
Posts: 2841
Location: Crestview FL
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| Posted: Tue May 27, 2014 8:56 pm Post subject: |
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As the car changes altitude, this device compensates for the changes in air pressure and volume to deliver the same mixture to the engine. Therefore, logic dictates that if keep the engine static and adjust the device, the car should change altitude on its own to compensate! It's a Vehicular Levitation Module (VLM)! Who knew our cars could fly?!  |
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