Author |
Message |
blatzer Samba Member

Joined: June 27, 2007 Posts: 428 Location: ATX
|
Posted: Sun May 11, 2025 11:06 am Post subject: Bus will not start |
|
|
-2 liter, hydro valve, fuel injected- '78 campmobile
it has spark and fuel flow, and the valves and timing are within spec... _________________ '70 Beetle- Quincy
'78 Campmobile- Kirby |
|
Back to top |
|
 |
busdaddy Samba Member

Joined: February 12, 2004 Posts: 52592 Location: Surrey B.C. Canada, but thinking of Ukraine
|
Posted: Sun May 11, 2025 11:14 am Post subject: Re: Bus will not start |
|
|
Did this come on suddenly?, done any maintenance recently? _________________ Rust NEVER sleeps and stock never goes out of style.
Please don't PM technical questions, ask your problem in public so everyone can play along. If you think it's too stupid post it here
Stop dead photo links! Post your photos to The Samba Gallery!
Слава Україні! |
|
Back to top |
|
 |
timvw7476 Samba Member
Joined: June 03, 2013 Posts: 2463 Location: seattle
|
Posted: Sun May 11, 2025 12:07 pm Post subject: Re: Bus will not start |
|
|
If those things you mention are all perfect.... your plug wires are in the wrong spots in the distributor or the fuel is too old... |
|
Back to top |
|
 |
blatzer Samba Member

Joined: June 27, 2007 Posts: 428 Location: ATX
|
Posted: Sun May 11, 2025 12:45 pm Post subject: Re: Bus will not start |
|
|
i was trying to install a pertronix, could not resolve the wire issue so i put the points back in and it's been silent since
itls getting spark, you can smell gasoline when cranking and not starting _________________ '70 Beetle- Quincy
'78 Campmobile- Kirby |
|
Back to top |
|
 |
SGKent  Samba Member

Joined: October 30, 2007 Posts: 42140 Location: at the beach
|
Posted: Sun May 11, 2025 2:13 pm Post subject: Re: Bus will not start |
|
|
blatzer wrote: |
i was trying to install a pertronix, could not resolve the wire issue so i put the points back in and it's been silent since
itls getting spark, you can smell gasoline when cranking and not starting |
Did you change the wire pattern when you put either distributor in? Normally one would rotate the engine to top dead center on the #1 compression stroke, and then make sure the rotor is pointing to number 1. The crankshaft has two top dead centers on each firing so make sure you are on the correct one. Is the distributor seated properly? If not it may not be keeping time. _________________ "Most people don't know what they're doing, and a lot of them are really good at it." - George Carlin |
|
Back to top |
|
 |
blatzer Samba Member

Joined: June 27, 2007 Posts: 428 Location: ATX
|
Posted: Sun May 11, 2025 7:01 pm Post subject: Re: Bus will not start |
|
|
is the ecu involved in this non-start event _________________ '70 Beetle- Quincy
'78 Campmobile- Kirby |
|
Back to top |
|
 |
airschooled Air-Schooled

Joined: April 04, 2012 Posts: 13419 Location: West Coast, USA
|
Posted: Sun May 11, 2025 8:42 pm Post subject: Re: Bus will not start |
|
|
blatzer wrote: |
is the ecu involved in this non-start event |
No. You can smell gas? Spark issue.
If you set your engine to TDC on the fan pulley, and have a helper/camera watch the valve adjusters on cylinder #3, rotate the engine a little back and forth around TDC, going a little more every few tries. If the rockers move, you’re at firing position for cylinder #1. If the rockers don’t move, you’re at firing position for #3.
Aftermarket electronic ignition: teaching us to adjust points since 1979. _________________ One-on-one tech help for your vintage Volkswagen:
www.airschooled.com
https://www.patreon.com/airschooled |
|
Back to top |
|
 |
SGKent  Samba Member

Joined: October 30, 2007 Posts: 42140 Location: at the beach
|
Posted: Sun May 11, 2025 10:10 pm Post subject: Re: Bus will not start |
|
|
fuel to air
Spark
Compression.
One of your jobs is to figure out which of the above is missing. Use your timing light to check for spark. Use your nose to tell you if there is fuel present or you can use some Berryman's B12 if you want to spray something flammable in it that won't lift a head, and you can turn it over by hand to feel for compression. _________________ "Most people don't know what they're doing, and a lot of them are really good at it." - George Carlin |
|
Back to top |
|
 |
frankvw Samba Member
Joined: October 25, 2012 Posts: 26 Location: Holland, the Netherlands
|
Posted: Mon May 12, 2025 7:05 am Post subject: Re: Bus will not start |
|
|
hi, I assume the starter does turn around based on the info I read.
in that case...Maybe try to disconnect the CHT sensor wire and ground it, and try again.
Could be a CHT sensor gone bad.... but just a wild guess, but easy to check |
|
Back to top |
|
 |
Xevin  Samba Member
Joined: January 08, 2014 Posts: 8484
|
Posted: Mon May 12, 2025 7:39 am Post subject: Re: Bus will not start |
|
|
frankvw wrote: |
hi, I assume the starter does turn around based on the info I read.
in that case...Maybe try to disconnect the CHT sensor wire and ground it, and try again.
Could be a CHT sensor gone bad.... but just a wild guess, but easy to check |
To the OP. You would probably call this the Temperature Sensor ll , TS2, or similar in the states. (Bentley) _________________ Keep on Busin'
67rustavenger wrote: |
GFY's Xevin and VW_Jimbo! |
Clatter wrote: |
Damn that Xevin...  |
skills@eurocarsplus wrote: |
I respect Xevin and he's a turd |
SGKent wrote: |
My God! Xevin and I 100% agree |
|
|
Back to top |
|
 |
Wildthings Samba Member

Joined: March 13, 2005 Posts: 52128
|
Posted: Mon May 12, 2025 8:50 am Post subject: Re: Bus will not start |
|
|
Check for spark at the plugs and not just at the coil wire. |
|
Back to top |
|
 |
blatzer Samba Member

Joined: June 27, 2007 Posts: 428 Location: ATX
|
Posted: Wed May 14, 2025 9:04 am Post subject: Re: Bus will not start |
|
|
the bus was running, now it's not- nothing was changed except the points... _________________ '70 Beetle- Quincy
'78 Campmobile- Kirby |
|
Back to top |
|
 |
SGKent  Samba Member

Joined: October 30, 2007 Posts: 42140 Location: at the beach
|
Posted: Wed May 14, 2025 10:16 am Post subject: Re: Bus will not start |
|
|
if you took the distributor out check
that it is fully seated
that the points are gapped right. I prefer to use a dwell meter because it will test them too
That the rotor is on and in the slot.
That the cap is on properly
That the wires are in the correct order with #1 being in the correct spot when the engine is on TDC of the #1 compression stroke
That the wires to the distributor are on the correct terminals
When all this is done check to see if you have spark at a spark plug, I use my timing light for that.
If you changed the coil when you added the electronic ignition, make sure you have the correct coil in it for point. _________________ "Most people don't know what they're doing, and a lot of them are really good at it." - George Carlin |
|
Back to top |
|
 |
airschooled Air-Schooled

Joined: April 04, 2012 Posts: 13419 Location: West Coast, USA
|
Posted: Wed May 14, 2025 10:52 am Post subject: Re: Bus will not start |
|
|
Points need to open, the right amount, at the right time, with a good condenser.
Everything else is details.
Do the points fully open and close with engine rotation? How much is their max gap? .018" is great for new points, but a business card is 100% usable in a pinch. Any time you touch points, the timing needs checking, and almost always needs adjusting. Static timing anywhere between 10°btdc and TDC will get the engine started.
Gotta have the condenser connected to the negative coil terminal.
Robbie _________________ One-on-one tech help for your vintage Volkswagen:
www.airschooled.com
https://www.patreon.com/airschooled |
|
Back to top |
|
 |
blatzer Samba Member

Joined: June 27, 2007 Posts: 428 Location: ATX
|
Posted: Sat May 24, 2025 11:45 am Post subject: Re: Bus will not start |
|
|
Quote: |
if you took the distributor out check
that it is fully seated
|
bingo! _________________ '70 Beetle- Quincy
'78 Campmobile- Kirby |
|
Back to top |
|
 |
Wildthings Samba Member

Joined: March 13, 2005 Posts: 52128
|
Posted: Sat May 24, 2025 1:27 pm Post subject: Re: Bus will not start |
|
|
blatzer wrote: |
the bus was running, now it's not- nothing was changed except the points... |
Did you take the distributor out to change the points? If so did you remove the wires from the cap?
For reference, I always remove the distributor to when dealing with the points, and I always just set the distributor cap aside before removing the dizzy with the plug wire still attached. To do other wise gives you a lot more ways to mess something up. The VW boxer distributor is about as easy to pull and replace as any out there and is a skill every owner needs to learn. Without looking at it, I would suspect that John Muir's Idiot Book would be a good reference for dealing with the distributor as it assumes its readers are novices. |
|
Back to top |
|
 |
SGKent  Samba Member

Joined: October 30, 2007 Posts: 42140 Location: at the beach
|
Posted: Sat May 24, 2025 1:35 pm Post subject: Re: Bus will not start |
|
|
I think his post was that he fixed it by seating it better.
blatzer wrote: |
Quote: |
if you took the distributor out check
that it is fully seated
|
bingo! |
_________________ "Most people don't know what they're doing, and a lot of them are really good at it." - George Carlin |
|
Back to top |
|
 |
|