71 stock won't stay at idle

[mjhale]

One day I started her up and we were idling for a minute and she stalled out. I haven't been able to start it since. It will start briefly with gas then stalls.

Stock engine 1600, carburetor 34 pict 3, and distributor.
New fuel pump, plugs, starter, ignition switch, carb adjustment, points are set, timing is set, new boot on intake manifold (suspected vacuum leak) and battery is good.
I'm only getting 10.48 V to carb solenoid. Got a new one and it tested the same.
Vacuum leak?
carb rebuild?
Distributor issue?

Thanks for the advice

[busdaddy]

Were all those new parts thrown at it after the issue arose?, or was it running OK before this came up?
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[mjhale]

A little of both...now I'm checking for spark on wire from cool to distributor. Looks like a weak spark

[Danwvw]

"busdaddy" is a real awesome troubleshooter and has helped me in the past. A good troubleshooter gets all the information he can find easily first. So if you know what exactly you changed before the problem and what exactly you changed after the problem that would help a lot. Also how long did it set etc.. any different gas used, got it out and got gas for the first time in a year or two.. Did you wash the engine and put the car away wet? . etc. Otherwise we got to go back to basics. Air, Fuel, Spark!
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1960 Beetle And 1679cc DP W-100 & Dual Zeniths!

[Jody '71]

Coil's on it's way out maybe??? Being that you're only getting 10+ volts at the idle cut-off solenoid (I bet that's what the choke element is getting also) you may wanna check to see what the coil is putting out. You mentioned weak spark. All the symptoms of a weak coil. Check your battery voltage as well. It should be putting out almost 13.5- 14 volts max with the engine running, about 12.8 with the engine shut down and not running. I may have a few of the #'s wrong and I may not be right about the coil, but you might wanna check the coil anyway. What type manufacturer and how old is it???
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'66 Beetle
2011 Hyundai Elantra Touring

[mjhale]

Points are set, getting good spark from coil, spark plugs are new and gapped correctly, fuel pump functions, but she still won't start.
Engine rotates but won't start.
What do I check next?

Thanks for advice

[mjhale]

Points are set, getting good spark from coil, spark plugs are new and gapped correctly, fuel pump functions, but she still won't start.
Engine rotates but won't start.
What do I check next?

Thanks for advice

[Abscate]

2 second shot of ether into carb, and see if it kicks.

That will isolate spark from fuel problem.
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.ssS!

[bsairhead]

With a mirror, look down the throat of the carb while pumping the throttle. If the accelerator pump is working and you have gas in the bowl you will see a stream of gas. If not look at carb issue. Are you missing a nut on your fuel pump?

[busdaddy]

[mjhale]

Now I've got no fuel pumping.
I have spark from coil and from spark plug wires. Sparks good but no fuel.
Steel gas line is fine headed to tank but very loose connection, to hose into tank, that is slightly torn. Do I replace that line?
Is there possibly something wrong with vacuum advance?
Thanks for help

[busdaddy]

[mjhale]

I like bonfires but not with my bus in the middle...got it.

Do you have a good "how to" video or other reference?

At first look, I have not found how long that steel gas line is. Can I just pull it out and bend it? Will the rubber hose just pull out too? Do I just cut the fuel line, pull lines out of tank and replace them? Is there more to it?

You mentioned moving the filter there instead of between pump and carb. Why?

Thank you

[mjhale]

I'll follow this procedure

https://ben.lobaugh.net/blog/166/how-to-replace-the-fuel-line-on-a-vw-bus

[hazetguy]

Keeping all your related problems in one thread makes it easier to follow along and help diagnose.
https://www.thesamba.com/vw/forum/viewtopic.php?t=673777
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[mjhale]

So I checked the fuel pump again and it's pumping gas. Engine started and ran with a little gas pedal but then stalled at idle. Not enough gas? Tune the carb? Change the lines?

The braided rubber on the steel gas line at the fire wall is ripped and I'll replace.
The intermittent flow of gas indicates contaminants in the line?

Possible vacuum leak?

Thanks for helping

[Abscate]

Pull the carb off and see how much crap is in it, clean it out, check fuel bowl and float, accelerator pump.

Your voltage at the solenoid is way too low. It should be the same as the battery voltage with the key on.
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.ssS!

[mjhale]

I'll remove and address carb issues. Thanks

As for low voltage at solenoid....follow that line to find source if dropped voltage?

I'll check voltage at choke too.

[busdaddy]

Yes, start testing at the coil, then if it's the same low voltage suspect that new ignition switch.
_________________
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!

[Kaput]

My 34 Pict 3 Doesn't like to idle correctly unless I turn the pilot jet out 1/4 turn. I also had this problem on my old bus with the same solution.

I put loctite on mine at the quarter turn position.

May not be it but worth a shot