engine stalls, what can cause that?

patrickgc Casual Dubber

29 posts · joined Jun 2011 · 12 Jul 2011, 7:21 am

#851348

Hi there,

I have a 1971 Type 3 and for some reason my engine stall when it runs on idle. It does it whether it is cold or hot and the confusing (for me) thing is that up to recently it was running just fine. I did refill with premium unleaded and added lead replacement (just got the car recently so that was my first refill). Could it be due to the petrol/lead replacement?

Volkswagen - Das Auto

Sides Veteran Volks Folk

2,220 posts · joined May 2007 · 12 Jul 2011, 8:06 am

#851355

Does it stop instantly it comes back to idle... or just sort of idle slower and slower until it stops ???

First one unlikely to be bad fuel... more like something electrical... maybe the condenser or cut-off jet disconnected.

Second one could be bad fuel, or possibly just the idle speed set too slow.

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patrickgc Casual Dubber

29 posts · joined Jun 2011 · 12 Jul 2011, 9:53 am

#851368

Thanks Sides,

It doesn't start as well as it did two weeks ago, it kind of runs but when you take the foot off the accelerator it slowly stalls. I started her up yesterday and she kind of doesn't run as smooth and again once I took the foot off the accelerator she got slower and slower and eventually stalled.

How is your EFI going?

Volkswagen - Das Auto

BiX Veteran Volks Folk

2,499 posts · joined Sep 2002 · 12 Jul 2011, 11:46 am

#851379

I would try draining the replacing the fuel. I had similar problems on another vehicle and it ended up being a bad batch of fuel (premium).

I have no sympathy for my car, only the wallet that pays for it!
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greedy53 Bishop of Volkswagenism

3,062 posts · joined Mar 2006 · 12 Jul 2011, 5:52 pm

#851399

you have either bad fuel or blocked filters and maybe anew set of points and condenser im leaning towards fuel there are usually 1 inline filter check along the fuel line for it and there is a filter in the fuel tank
a quick check is to take the fuel line of the pump an it should run freely.mind you a set of points and condenser wont hurt and it could be that the points have closed up

good luck

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Turbo66 Casual Dubber

41 posts · joined Jan 2010 · 12 Jul 2011, 9:33 pm

#851468

clean your idle jets and ports

stagvee40 Commited Dubber

68 posts · joined Jan 2011 · 13 Jul 2011, 6:09 pm

#851586

most likely to be off fuel or perhaps you have a fuel blockage, dosent sound very electrical although i agree new points and condenser wouldnt hurt..............check the timing

grant.

patrickgc Casual Dubber

29 posts · joined Jun 2011 · 21 Jul 2011, 3:14 pm

#852906

I decided to take the bubble to the local petrol station this weekend and she ran beautifully. I then took her for longer drive the following day and again there were no dramas. Is it possible that whatever made he stalling earlier was burned through....?

I am also considering just running ULP rather than adding lead replacement. Quite a few people seem to work that way, did anyone have problems doing that?

Volkswagen - Das Auto