TheSamba.com :: View topic - My Beetle stalls after running it for a mile or so..

Thu Jul 05, 2012 10:08 am

My bettle stalls after running it for a mile or so, it feels like it looses power then it stalls. It stops for a minute or so then it starts but runs for short distance, it feels like a gas issue to me but dont for sure. The gas pump it fairly new no more than 1200 miles on it. I do niticed that it ussing more gas than usual. Some one suggested vapor lock if it is this replacing the fuel pump will this fix the problem?

Thu Jul 05, 2012 10:17 am

Tell us some more about the car. What year what engine what mods?

Have you started in the gas tank to see if its clean? Checked the sock screen on the pick up? Changed any inline filter you may have?

Thu Jul 05, 2012 4:32 pm

Its 64 bettle, with a 12volt convertion. I replace the fuel pump and filter, but still has some hesitation when i acelarate the car, I havent mess with carburator or the distributor. I did noticed oil leaking from the rear axle boot. And it left quite some oil on the floor, could that be related with stalling and hesitation? I had a full overhaul on the engine last year but I feel they a crapy work on it.

Thu Jul 05, 2012 4:56 pm

check the fuel pump rod .... mine was acting like that . it was the rod sticking after it got warm . i took some sand paper and made it smoother . problem solved . also make sure the fuel pump flange is centered and not pushing agest the rob .. .. also make sure you have the correct size rod ...

Thu Jul 05, 2012 5:04 pm

I took the rod out when i change the pump and its not even all the way. Does it has to be smooth?

Fri Jul 06, 2012 2:25 pm

Sounds to me like it runs when the choke is on, but once the choke is "warmed" up it stalls from running lean. Maybe there is some junk in the carb blocking a fuel jet so it won't run once it leans out. You stop (it stalls) , the choke resets, then the whole thing stars over again. good luck T :?

Fri Jul 06, 2012 2:30 pm

Quote: I do niticed that it ussing more gas than usual

Is the gas leaking into the crankcase from a broken diaphram on the pump?
we had a new pump last a week before it started leaking

Wed Jul 11, 2012 6:16 pm

Hi guys, im back sorry for taking so long. I change the fuel pump, the push rod and check that the push rod runs freeely even when it gets too hot. I change the fuel filter too, but it keeps hesitating, i mean i run in the freeway for about 5 miles and it started to kind of stopping. I dont think is vapor lock anymore, please help....

Wed Jul 11, 2012 7:41 pm

has it ever ran right?

Wed Jul 11, 2012 7:43 pm

Is the fuel cap vented? Is it clear?

Wed Jul 11, 2012 8:31 pm

Yes everything was until a couple of weeks ago it left me stranded, at first it feel like a fuel problem, but cant think of anything else. What do you mean about the fuel cap vented?

Thu Jul 12, 2012 6:44 am

Matsumateo wrote: Yes everything was until a couple of weeks ago it left me stranded, at first it feel like a fuel problem, but cant think of anything else. What do you mean about the fuel cap vented?

If the fuel tank isn't vented, then pumping fuel creates a vacuum in the fuel tank, so very tough to pump any fuel to the carb.

I had this happen on mine back in 1984. Burp the fuel tank cap, and see if that makes any difference. You should be able to drive many miles if that's the culprit; I burped mine every other day until I found a clogged vent hose and cleaned that.

I'd also get a can of aerosol starting fluid and carry that, so you can use that to isolate whether it truly is a fuel-related issue next time it stalls out. If spraying that into the carb or air cleaner helps it run (even briefly), then it's fuel related.

Thu Jul 12, 2012 7:24 am

Quote: I do niticed that it ussing more gas than usual....

And, since you mention it, I gather that you noticed both things at the same time?

If so, find out where the excess fuel is going, and you will probably find your problem.

Does the oil, especially the oil the car is dribbling, smell like gas? If so, stop driving the car until you get it fixed. Walk around back while the engine is running and look for leaks. Look under the car after it has been parked for a while. Use your nose. If you find any leaks, don't drive the car until you get them fixed.

There could be lots of things wrong with your car, but these two could kill your car, and one of them could kill you, so check them first, as in before you drive again.

After you've ruled out the dangerous stuff, check your fuel pressure. If it checks out ok, have somebody drive behind you in for as long as practical while you go up and down through the gears, and have them look for excess unburned fuel, visable as "black smoke" coming out your tail pipes. If the problem is the choke, you will likely find it this way.

Check the plugs. We usually expect to see a "rich running" condition as a dark black buildup. (This same stuff, incidentally, is probably building up in the rest of the combustion chamber, and the heat risers, if so equipped. Do not want.)

To sum up; if your car really is using more gas than it should, either the fuel is being leaked, or something has gone wrong with the fuel system so that it is providing too much fuel for the air/fuel mix, and we usually expect to at least occasionally see some black smoke or evidence of carbon build-up in such a case.

If, however, this was a mistaken observation (it happens) and the car is not using more fuel than normal, the problem is likely garbage in the tank or a blocked vent. Generally speaking, though, we would not expect those things to cause the engine to use more gasoline than normal (except perhaps for a moderate increase coming from actuating the acclerator pump while feathering the pedal in an attempt to stave off the stalling).

Good hunting; keep us posted.

Thu Jul 12, 2012 7:39 am

borrow a good coil from a friend if you have one and try that..........my car did a similar thing before and that was problem. I'd also change out the condenser

Thu Jul 12, 2012 9:29 am

Have you tuned it up? Adjusted valves, checked TIMING?
You may have to take a good look at the distributor to check the vacuum can is good and there's no corrosion. It seems to me it could be a timing or tuneup issue.

Thu Jul 12, 2012 7:41 pm

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Thu Jul 12, 2012 7:56 pm

hi guys i checked the oil and its doesn't smell like gas. Also checked for a gas line leaking and can't seem to find any leak. The carburetor its new so is the fuel pump, also checked the spark plugs and there's no oil or dark built up on them. Let me tell you that the engine has a full overhaul also a new carburetor, electronic distributor, new alternator. its been running fine until now...

Thu Jul 12, 2012 8:07 pm

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Thu Jul 12, 2012 8:09 pm

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Thu Jul 12, 2012 8:10 pm

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