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bbmdprince
Samba Member
Joined: February 20, 2018
Posts: 5
Location: Spokane
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 Posted: Tue Feb 20, 2018 2:13 pm Post subject: 73 Beetle. Replaced the carburetor... won't start |
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| 16 year old son bought a 73 Beetle. Replaced the carburetor this weekend...now the silly thing won't start? it worked before he replaced it. any tips would be appreciated!!! |
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sjbartnik
Samba Member
Joined: September 01, 2011
Posts: 5993
Location: Brooklyn
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| Posted: Tue Feb 20, 2018 2:38 pm Post subject: Re: Fuel injection to carberator |
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| bbmdprince wrote: |
| 16 year old son bought a 73 Beetle. Replaced the carburetor this weekend...now the silly thing won't start? it worked before he replaced it. any tips would be appreciated!!! |
You should probably start your own thread rather than piggybacking on this one, but my tip would be "if it ain't broke, don't fix it"
Why was he replacing the carb? What kind of carb was he replacing and what kind of carb was the replacement?
There are a lot of things he could have done that would result in a no-start. Work through the basics checklist, you need fuel, spark, and air for it to run (and compression).
The other tip: an old German Solex carb rebuilt properly is light years ahead in quality of any aftermarket Chinese-built replacement copy.
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1965 Volkswagen 1500 Variant S
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EverettB 
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Joined: April 11, 2000
Posts: 69798
Location: Phoenix Metro
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sb001
Samba Member
Joined: May 19, 2011
Posts: 10406
Location: NW Arkansas
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| Posted: Wed Feb 21, 2018 9:12 am Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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Did he forget to hook the wire from the ignition coil back up to the idle cutoff solenoid on the carb?
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1969 autostick sedan, family owned since new
1600 SP engine
Solex 30 PICT 3 carburetor
Bosch 113905205AE autostick distributor |
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Cusser
Samba Member
Joined: October 02, 2006
Posts: 31355
Location: Hot Arizona
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| Posted: Wed Feb 21, 2018 9:28 am Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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This diagram is always good.
Start by checking for voltage at coil terminal #15 with the key in the "run" position.
This was likely not involved here, but good to post anyway.
Finally - was the fuel pump removed when this was done? If so, make sure IN and OUT are correct.
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1970 VW (owned since 1972) and 1971 VW Convertible (owned since 1976), second owner of each. The '71 now has the 1835 engine, swapped from the '70. Second owner of each. 1988 Mazda B2200 truck, 1998 Frontier, 2014 Yukon, 2004 Frontier King Cab. All manual transmission except for the Yukon. http://www.thesamba.com/vw/forum/album_page.php?pic_id=335294 http://www.thesamba.com/vw/forum/album_page.php?pic_id=335297 |
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bluebus86
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Joined: September 02, 2010
Posts: 11075
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| Posted: Wed Feb 21, 2018 10:05 am Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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you replaced the carb and she wont work. What kind of carb was used as replacement? new, used, condition?
Id consider putting the original good running carb back on and see if problem corrects, if so, maybe new carb is defective, needs rebuild?
How is the fuel level in the float bowl? it must be correct inorder to work correctly.
Keep us posted, good luck, Bug On !
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bbmdprince
Samba Member
Joined: February 20, 2018
Posts: 5
Location: Spokane
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| Posted: Wed Feb 21, 2018 8:22 pm Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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Ok now it’s backfiring? Not sure how to post a video if that would help anyone to see??
Last edited by bbmdprince on Wed Feb 21, 2018 8:43 pm; edited 1 time in total |
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67rustavenger
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Joined: February 24, 2015
Posts: 9749
Location: Oregon
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| Posted: Wed Feb 21, 2018 8:36 pm Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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Post a pic of the engine!
We'll tear it apart.
The samba jury misses nothing. 
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Cheap parts are gonna disappoint you.
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bbmdprince
Samba Member
Joined: February 20, 2018
Posts: 5
Location: Spokane
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| Posted: Wed Feb 21, 2018 8:45 pm Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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| Posted engine pictures...any tips would be sooo appreciated!!!! |
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mukluk
Samba Member
Joined: October 18, 2012
Posts: 7020
Location: Clyde, TX
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| Posted: Wed Feb 21, 2018 9:13 pm Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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One immediately noticeable item is the advance and retard vacuum lines from the carb to distributor are connected backwards. The left side carb fitting should be connected to the distributor front (advance) fitting, the rear carb fitting connected to the rear (retard) distributor fitting. Keep in mind front is always toward the front of the car, rear is always toward the rear of the car.
Item two is a green vacuum line attached to the intake manifold under the carb doesn't appear to be attached to anything -- it's currently acting as a vacuum leak which will negatively affect the fuel mixture.
Could you clarify what was done between the first post where the car wouldn't run and the recent post where it's now backfiring?
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VW_Jimbo
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Joined: May 22, 2016
Posts: 9944
Location: Huntington Beach, CA
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| Posted: Wed Feb 21, 2018 10:25 pm Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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I would double check the order of the plug wires, then the point gap.
Then, see if it will run by just shooting little shots of carb cleaner into the carb from 10 inches away. If it will run, maybe check the fuel line from the pump is connected to the output side of the pump.
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Jimbo
There is never enough time to do it right the first time, but all the time necessary the second time!
| TDCTDI wrote: |
| Basically, a whole bunch of fuckery to achieve a look. |
| 67rustavenger wrote: |
GFY's Xevin and VW_Jimbo!  |
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bbmdprince
Samba Member
Joined: February 20, 2018
Posts: 5
Location: Spokane
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| Posted: Fri Feb 23, 2018 2:59 pm Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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| Ok, he has now made sure the distributor wires are in the correct positions, all the spark plugs are firing, all wires are connected, all hoses are connected, fuel is reaching the carburetor, and yet the car won’t run. The car tries to start when we turn the key but we only get backfirings and a puff of smoke here and there. Anything else that he could try to get it running? |
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Dark Earth
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Joined: December 22, 2015
Posts: 1054
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| Posted: Fri Feb 23, 2018 3:38 pm Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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| bbmdprince wrote: |
| Ok, he has now made sure the distributor wires are in the correct positions, all the spark plugs are firing, all wires are connected, all hoses are connected, fuel is reaching the carburetor, and yet the car won’t run. The car tries to start when we turn the key but we only get backfirings and a puff of smoke here and there. Anything else that he could try to get it running? |
It's really easy to get the wires on the distributor cap mixed up. The only real way to confirm everything is right is to turn the crankshaft pulley until the timing mark lines up, pull the valve cover and make sure the #1 cylinder valves are both closed (there should be .006" lash between both rocker arms and the valves), and make sure the rotor is pointed at the #1 plug wire. If one of the valves is "rocking" turn the crank pulley 180 degrees until the timing mark lines up and check that both valves are closed again. If all three things occur at the same time ... 1) Timing mark lines up 2) Both valves on the #1 cylinder are closed 3) The rotor is pointing at the #1 plug wire ... your #1 spark plug wire is right. Then just go around the cap to confirm the other three wires are right.
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Pruneman99
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Joined: February 22, 2012
Posts: 5013
Location: Oceanside
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| Posted: Fri Feb 23, 2018 5:06 pm Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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| mukluk wrote: |
One immediately noticeable item is the advance and retard vacuum lines from the carb to distributor are connected backwards. The left side carb fitting should be connected to the distributor front (advance) fitting, the rear carb fitting connected to the rear (retard) distributor fitting. Keep in mind front is always toward the front of the car, rear is always toward the rear of the car.
Item two is a green vacuum line attached to the intake manifold under the carb doesn't appear to be attached to anything -- it's currently acting as a vacuum leak which will negatively affect the fuel mixture.
Could you clarify what was done between the first post where the car wouldn't run and the recent post where it's now backfiring? |
Did you fix these issues? It won't run worth a crap with these problems. If this got fixed, double, and triple check your timing and firing order. |
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Dark Earth
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Joined: December 22, 2015
Posts: 1054
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| Posted: Fri Feb 23, 2018 5:45 pm Post subject: Re: 73 Beetle. Replaced the carburetor... won't start |
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| sb001 wrote: |
| Did he forget to hook the wire from the ignition coil back up to the idle cutoff solenoid on the carb? |
sb001 is talking about the electric solenoid screwed into the carburetor at the bottom left. If it doesn't have 12 volts, fuel won't flow through the carburetor.
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