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luckyth13teen
Samba Member
Joined: September 08, 2013
Posts: 62
Location: Burlington VT
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 Posted: Wed May 27, 2015 1:18 pm Post subject: engine dies out after warmup [Solved] |
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looking for some direction on where to go next on this,
1970 beetle, 43pic 3 carb
car turns on fine runs very well [higher idling than I would consider normal, but not outside the realm of reasonable]. Runs like this until it warms up. Then promptly dies...
So far I have done complete checkup [timing,valve gaps, and oil].
re built the carb.
I know there is a small leak [1-2 drips a night] from driver side valve cover cap, looks like the seal is a little worn. have not replaced yet.
When the car is running and i'm pulling from spot to spot in the garage it feels like the power is low, requires pumping the gas more than I would normally expect for releasing clutch into first.
post stall the carb has plenty of fuel in the float area [so likely not the pump]
when the car is cool and running and I manually move the throttle I get a good fuel spray so i'm thinking it isn't a blockage in the carb.
the only thing I can think that I haven't checked into is the spark [coil, cap, cables and plugs] yet.
I feel like i'm missing something simple....
Thoughts/directions/tests?
Thanks all!
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Last edited by luckyth13teen on Tue Jun 02, 2015 3:13 pm; edited 1 time in total |
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Randy in Maine
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Joined: August 03, 2003
Posts: 34890
Location: The Beach
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| Posted: Wed May 27, 2015 1:48 pm Post subject: |
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| Is this a dual port engine? What distributor do you have on there and how do you have it timed? |
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luckyth13teen
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Joined: September 08, 2013
Posts: 62
Location: Burlington VT
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| Posted: Wed May 27, 2015 2:07 pm Post subject: |
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| Randy in Maine wrote: |
| Is this a dual port engine? What distributor do you have on there and how do you have it timed? |
yes a dual port, I don't remember brand, but not a vacuum [doesn't have the diaphragm on the side] I timed it static to 7-10 [not a degreed pulley].
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theblake
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Joined: May 27, 2014
Posts: 30
Location: Honolulu, Hawaii
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| Posted: Wed May 27, 2015 4:06 pm Post subject: |
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| Did you set the idle air screw correctly? Make sure the choke is fully open when you set it. |
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luckyth13teen
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Joined: September 08, 2013
Posts: 62
Location: Burlington VT
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| Posted: Thu May 28, 2015 4:31 am Post subject: |
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| theblake wrote: |
| Did you set the idle air screw correctly? Make sure the choke is fully open when you set it. |
I set the adjustment screws on the carb to the default starting positions [2.25 turns out from full in] as dictated by how to keep your vw alive.
It hasn't idled long enough post first start to adjust it beyond that initial setting. should.
It seems odd to me that this could cause that my symptoms. I can try adjusting the idle air screw tonight though.
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jderianSF
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Joined: June 24, 2013
Posts: 35
Location: San Francisco
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| Posted: Thu May 28, 2015 6:23 am Post subject: Re: engine dies out after warmup |
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| luckyth13teen wrote: |
looking for some direction on where to go next on this,
1970 beetle, 43pic 3 carb
*snip*
the only thing I can think that I haven't checked into is the spark [coil, cap, cables and plugs] yet.
I feel like i'm missing something simple....
Thoughts/directions/tests?
Thanks all! |
Do this. Check the plugs etc.. How old are they?
It might not cure the reason for the stalling, but it'll probably improve. Plus it will eliminate this as a cause.
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Jason |
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Bob Brugge
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Joined: April 09, 2015
Posts: 721
Location: Missoula, MT
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| Posted: Thu May 28, 2015 7:26 am Post subject: |
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| I would agree that it might be the carb. I would disconnect the choke and see how it does. Another thought might be a big fat vacuum leak that presents it self as the parts get warm. |
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luckyth13teen
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Joined: September 08, 2013
Posts: 62
Location: Burlington VT
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| Posted: Thu May 28, 2015 7:32 am Post subject: |
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| Bob Brugge wrote: |
| I would agree that it might be the carb. I would disconnect the choke and see how it does. Another thought might be a big fat vacuum leak that presents it self as the parts get warm. |
referring to the electric choke? or keeping the butterfly open manually?
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theblake
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Joined: May 27, 2014
Posts: 30
Location: Honolulu, Hawaii
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| Posted: Fri May 29, 2015 1:20 pm Post subject: |
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Don't disconnect the wire from the electric choke unless you ground it securely on something else. If the wire just hangs there when the ignition is on, it'll get super hot or spark on something.
Does it run with the choke fully open?
Also, like Bob said, check for a vacuum leak. |
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mukluk
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Joined: October 18, 2012
Posts: 7028
Location: Clyde, TX
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| Posted: Sat May 30, 2015 12:18 pm Post subject: |
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| theblake wrote: |
| Don't disconnect the wire from the electric choke unless you ground it securely on something else. If the wire just hangs there when the ignition is on, it'll get super hot or spark on something. |
Grounding the wire for the choke is a sure way to get the wire hot and melt, possibly causing a fire or damage to your wiring harness. If you find it neccessary to disconnect the choke element wire and cannot remove that section of wire entirely, you need to cover the end of the wire thoroughly with a good insulator to ensure it doesn't ground to anything.
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1960 Ragtop w/Semaphores "Inga" |
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sjbartnik
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Joined: September 01, 2011
Posts: 5998
Location: Brooklyn
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| Posted: Sat May 30, 2015 12:24 pm Post subject: |
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| theblake wrote: |
| Don't disconnect the wire from the electric choke unless you ground it securely on something else. |
This is terrible and dangerous advice. The wire to the choke is an un-fused hot wire. If you ground it, you create a direct short. This will shut down the ignition system (because the power comes from the hot side of the coil) and will also burn the insulation off the wire real fast - and may catch other things on fire in the process. So, don't do this.
If you want to disconnect the choke, disconnect it from the coil. That way the wire is not a hot wire left powered dangling around in a compartment full of potential ground points.
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1965 Volkswagen 1500 Variant S
2000 Kawasaki W650 |
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mukluk
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Joined: October 18, 2012
Posts: 7028
Location: Clyde, TX
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| Posted: Sat May 30, 2015 12:34 pm Post subject: |
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To the OP: an engine that runs when cold with the choke closed which then dies after warming up and the choke opens is a classic example of a blocked idle circuit. When you turn the ignition to the ON position prior to starting it, can you hear the shutoff solenoid on the left side of the carb click? You may need to go back to the engine and alternately disconnect and connect the wire to the solenoid with the ignition ON in order to hear it. If the solenoid is working, try unscrewing the idle jet no more than a quarter turn to see if that enables the car to idle (it's the brass-coloured piece that looks like a bolt on the right side of the carb under the choke element). If unscrewing the idle jet slightly allows it to idle, the jet is plugged. If that doesn't do the trick, remove the idle jet and blow the idle passage out with a can of carb cleaner -- you should see the cleaner spray out into the throat of the carb -- then reinstall the idle jet and give it another go.
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1960 Ragtop w/Semaphores "Inga" |
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luckyth13teen
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Joined: September 08, 2013
Posts: 62
Location: Burlington VT
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| Posted: Tue Jun 02, 2015 11:49 am Post subject: |
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| mukluk wrote: |
| To the OP: an engine that runs when cold with the choke closed which then dies after warming up and the choke opens is a classic example of a blocked idle circuit. .... |
just to verify is this the valve?
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luckyth13teen
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Joined: September 08, 2013
Posts: 62
Location: Burlington VT
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| Posted: Tue Jun 02, 2015 3:12 pm Post subject: |
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| mukluk wrote: |
| To the OP: an engine that runs when cold with the choke closed which then dies after warming up and the choke opens is a classic example of a blocked idle circuit.. |
You sir!
There is little to no way I can express my gratitude for this simple piece of knowledge.
Slug bug now runs, and I couldn't be more excited and grateful.
If you are ever in the Burlington VT area, I will happily supply a 6pack of your choice.
Hell if you PM me a paypal account I'll send you the beer money today.
dude you fucking rock.
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Ratbug13
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Joined: August 24, 2014
Posts: 18
Location: Dunbarton, Nh, USA
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| Posted: Tue Jun 02, 2015 4:35 pm Post subject: |
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i have nothing useful to add to this. just thought you might appreciate it by your user name 
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mukluk
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Joined: October 18, 2012
Posts: 7028
Location: Clyde, TX
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| Posted: Tue Jun 02, 2015 11:16 pm Post subject: |
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Glad you got it fixed. So was it the shutoff solenoid or a plugged idle jet?
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1960 Ragtop w/Semaphores "Inga" |
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djack47
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Joined: October 21, 2010
Posts: 52
Location: Poteau OK
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| Posted: Wed Jun 03, 2015 12:02 am Post subject: How did you fix it ? Clean out like a jet? |
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| luckyth13teen wrote: |
| mukluk wrote: |
| To the OP: an engine that runs when cold with the choke closed which then dies after warming up and the choke opens is a classic example of a blocked idle circuit.. |
You sir!
There is little to no way I can express my gratitude for this simple piece of knowledge.
Slug bug now runs, and I couldn't be more excited and grateful.
If you are ever in the Burlington VT area, I will happily supply a 6pack of your choice.
Hell if you PM me a paypal account I'll send you the beer money today.
dude you fucking rock. |
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luckyth13teen
Samba Member
Joined: September 08, 2013
Posts: 62
Location: Burlington VT
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| Posted: Wed Jun 03, 2015 4:24 am Post subject: |
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| mukluk wrote: |
| Glad you got it fixed. So was it the shutoff solenoid or a plugged idle jet? |
Idle jet!
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eashc
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Joined: April 10, 2012
Posts: 340
Location: Ventura County
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| Posted: Wed Jun 03, 2015 7:03 am Post subject: |
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| luckyth13teen wrote: |
| mukluk wrote: |
| Glad you got it fixed. So was it the shutoff solenoid or a plugged idle jet? |
Idle jet! |
Cool, it runs
Just a word of caution, don't over tighten that idle jet and strip the threads. actually don't over tighten any carb screws. Once had a striped idle jet, always had to mess with it to keep it idling. |
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luckyth13teen
Samba Member
Joined: September 08, 2013
Posts: 62
Location: Burlington VT
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| Posted: Wed Jun 03, 2015 7:27 am Post subject: |
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| eashc wrote: |
| luckyth13teen wrote: |
| mukluk wrote: |
| Glad you got it fixed. So was it the shutoff solenoid or a plugged idle jet? |
Idle jet! |
Cool, it runs
Just a word of caution, don't over tighten that idle jet and strip the threads. actually don't over tighten any carb screws. Once had a striped idle jet, always had to mess with it to keep it idling. |
i've learned this the hard way on a car forever ago [i think it was the air mixture controlling valve] 300$ later.....
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