Fuel issue. Baja dies

[Heyheyitsraay]

Hello all. Ive been having a issue for a while. So here's the scenario

I get in my 66 bug and usually have to give it some gas to get it started/idle. Once the bug is warmed up I am on my way for about a 30 minute drive on the highway. Once I get off the highway into to town, I am in stop and go traffic. About 10-15 mins of traffic later my Baja will slowly die. I will push down the acceleration pedal and she won't rev. Try down shift, won't rev....now I'm on the side of the road. I sit there for approx 45min. Then the Baja will start up again and I'm on my way.

I've tried pouring gas into the carb and she'll start for a while but I'll have to be pushing the acceleration pedal constantly to keep it running.

Side note: I've driven it almost 2 hrs away at a consistant 60-65mph.
Visited family for about an hour and drove it back those same 2 hours. Stopped at the store around the corner from my house (turned car off to go in and get some beer) came back out and she turned on fine.

Thanks to any help

[Heyheyitsraay]

Also. Very sure it's not vapor lock as I have plenty of fuel in my fuel filter as well as wrapped the very little metal line with alminum foil

[Mikedrevguy]

What’s the carbs? Motor? Fuel pressure? Fuel pump?
What’s the motor specs?
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74 1303 (RevBug): plan for German Look
76 914 with 2260
79 VW Iltis
69 Bwajaja
"The wise speak because they have something to say; while the foolish speak because they have to say something." Plato

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[tripicana]

I had a bad coil act like that. It would heat up and start stumbling and slowly die, not like most electrical on/off problems. Let it sit for a while, start right up, repeat process.
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[Dale M.]

Two thoughts, vacuum in fuel tank the fuel pump can not overcome, how good is tank vent... Maybe next drive with cap loose or off will validate vent problem...

As others mention, coil, as it heats up may be failing as it gets "hot"... Heat makes a connection in side coil go high resistance, as it cools resistance drops and it will run....

Dale
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"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
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All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...

[Heyheyitsraay]

[TDCTDI]

When it dies, remove the top of the carb & check fuel level in float bowl. If empty then you need to find out if there is a restriction & where it's at. This could be due to a blockage in the tank, the fuel line, fuel filter, possibly a bad fuel pump, a binding fuel pump pushrod (This presents itself when the engine gets warm & expands causing the fuel pump pushrod spacer to bind the pushrod, after a few minutes of cooling, it releases & starts pumping fuel again.).

If the bowl is full, you might have a piece of trash that intermittently blocks the main jet. Or, you might have an electrical issue, perhaps the points or condenser.
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Everybody born before 1975 has a story, good, bad, or indifferent, about a VW.


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[Multi69s]

[Pam's buggy]

You said you recently changed the coil.
Could be the problem.
What coil did you use?

It could be a good coil and still get hot.
If it's not the right ohm range.
Do you still have the external resistor on it?
If so does the coil have a internal resistor?

[Heyheyitsraay]

[dustymojave]

Have you checked for fuel flow past the filter?
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Richard
Offroading VW based cars since 1965
Tech Inspection 1963 - 2012 SCCA/SCORE/HDRA/MORE/MDR +
Retired from building Bajas, Fiberglass Buggies and Rails in the Mojave Desert. Also Sprints & Midgets, Dry Lakes, Road Race cars. All types New and Vintage
SoCalBajas Member
Kicked Cancer's A$$...1st and 2nd round...Fight ain't over yet.

[Heyheyitsraay]

[Mal evolent]

in my experience, just replace all the vacuum hoses before you start troubleshooting.tighten connections, inspect manifold rubber - eliminate any possibility of vacuum leaks, and you may not have any trouble to shoot
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73 Beetle Baja, Ghia front brakes, Type 3 rear brakes, 2220 ( 94 X 80 ), Weber Progressive, Bosch SVDA, '97 Mustang seats

Baja Bugs for Volkswagen Virgins: Index

[DHale_510]

I have been bitten by the little rubber pigtail fuel line under the gas tank collapsing several times. It still flows enough to run slowly but not at speed. It's the simplest thing to fix too. Replace it first.
Dennis