[T2] Engine intermittently turns off while coming to a stop

[Richard F Coombs]

That booster is a PITA to change, & also not cheap (AMHIK) but the price you pay for having power brakes.

As a quick check, pump the brake pedal while you're sitting at idle. If the idle breaks up while your brake pedal is depressed, or there is anything but a tiny drop in idle speed, the booster or the lines to it are leaking vacuum. Also, to check for proper function of a booster, start the engine with the brake pedal depressed. As vacuum builds in the booster, the pedal should drop a bit, & then hold at that lower level for at least 60 sec. without fading. This last test is also a check to see if your brake hydraulics are leaking. Check for brake fluid leaks, including the rear cylinders, before you condemn a booster because of fade.

If the booster is working, I would look to the carburetor next. Float needle valve or float level issues, or rich/lean mixture issues at idle. I recently had this exact problem when I was trying to see how far I could turn in the idle air screw on a 34-Pict 3. Apparently, I screwed it in too far (lean). A half turn out solved the problem.  

Richard Coombs

'71 hippie Bus "Putt-Putt"
'71 homebrew camper "Sugar Magnolia" 
my71vwbusputt-putt at blogspot.com



-----Original Message-----
From: type2 [mailto:type2-bounces at type2.com] On Behalf Of accessys at smart.net
Sent: Wednesday, September 03, 2014 9:33 AM
To: Max Bronsema
Cc: Type 2 List
Subject: Re: [T2] Engine intermittently turns off while coming to a stop




On Tue, 2 Sep 2014, Max Bronsema wrote:

> Date: Tue, 2 Sep 2014 20:21:38 -0700
> From: Max Bronsema <max.bronsema at gmail.com>
> To: Joseph Delecki <jdelecki at msn.com>, Type 2 List <type2 at type2.com>
> Subject: Re: [T2] Engine intermittently turns off while coming to a 
> stop
> 
> Bob and Joseph,
>
> Thanks for the quick replies. It does not seem to cut out while 
> shifting about the gears with the clutch depressed. I do apply the 
> brakes to stop,
> :) so maybe it is the brake booster diaphragm. Is the diaphragm easy 
> to check or is it basically put a new one in and see if that fixes the problem?
>
> Thank you all,
>
> Max
>
>
>>
> _______________________________________________
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> type2 at type2.com
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