Date: Thu, 17 Dec 2009 17:57:27 -0800
Reply-To: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott Daniel - Turbovans <scottdaniel@TURBOVANS.COM>
Subject: Re: It's doing it again . . . additional symptom
Content-Type: text/plain; format=flowed; charset="utf-8"; reply-type=original
I'm a little skeptical about this 'needs a new throttle body' idea.
First, I'd check that the throttle switch is closing at idle.
there are two styles fitted to 1.9 waterboxer engines.............
the early type with the two switches mounted right on top,
and the later type with a single switch on the bottom of the throttle body.
I am finding many of the 'switch underneath' ones not able to reach
adjustment, or rusted and stuck in one position, which is a problem.
also .........WHEN the throttle switch makes contact is important.
I had a case of my own van where it would not drive smoothly at very low
rpm, not that I lug it around, but it should not buck, and operate smoothly
at low throttle openings.
Adjusting the idle switch so it is just closed very close to zero throttle
fixed that bucking thing.
And sometimes it can be tricky to make sure it *always* makes contact at
idle, every last time ........
and breaks contact pretty close to zero throttle as you open the throttle.
if you have say, 5 to 10 % throttle opening before the switch tells the ecu
that it's not at idle anymore, that will confuse things for sure.
I'd check that. - idle switch adjustment.
And lube the throttle shaft bushings, and everything that moves on it.
Ignition timing also comes to mind. That can't be too advanced at idle.
Scott
www.turbovans.com
----- Original Message -----
From: "john" <jhlauterbach@BELLSOUTH.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, December 16, 2009 5:07 PM
Subject: Re: It's doing it again . . . additional symptom
> Mike. you need a new throttle body. After engine is warmed up, ECU
> doesn't like high idle speeds, so it kills the fuel. Idle speed drops,
> and fuel starts again. If throttle body is worn, throttle plate cannot
> close and you get high idle.
>
> John
> '84 7-passenger
>
> On Wed, 2009-12-16 at 11:38 -0800, Rocket J Squirrel wrote:
>> While I'm waiting for the engine to do that no power thing again (see
>> below) so I can try the WD-40 in the dizzie to see if that helps, the van
>> did something interesting while I was at the bank's drive up window.
>>
>> Thar I was, minding my own business while the nice lady was processing my
>> deposit when I noticed that the engine was idling high (1.9L, AT,
>> transmission in Park, engine warm). So I tapped the gas pedal to see if
>> anything needed unsticking, and the rpms dropped to about 1000, then
>> climbed to about 1800, then dropped to 1000, climbed back to 1800, and
>> did
>> this over and over. The period was about 2 seconds. The O2 meter thing
>> showed full rich when the engine was speeding up, full lean when it
>> dropped back to lower rpm. Tapping the gas pedal did not correct this,
>> the
>> first or second time, but on the third try, the engine dropped back into
>> normal idle with the O2 gauge swinging lazily from end to end. When
>> driving, the O2 gauge showed normal, rapid, swings.
>>
>> --
>> Mike "Rocket J Squirrel" Elliott
>> 84 Westfalia: Mellow Yellow ("The Electrical Banana")
>> 74 Westrailia: (Ladybug Trailer company, San Juan Capistrano, Calif.)
>> Bend, OR
>> KG6RCR
>>
>>
>> > On Dec 15, 2009, at 5:40 PM, Rocket J Squirrel wrote:
>> >
>> >> I had to run some errands today. Unlike last week, when it was well
>> >> below
>> >> freezing, and the van ran just fine, we've been experiencing some
>> >> above-freezing temperatures, and today it was raining. So I'd have to
>> >> say
>> >> that it's somewhat humid (like, 90%) today, but not particularly cold
>> >> (mid
>> >> 30's [F]).
>> >>
>> >> On more than one occasion the engine ran like poo-poo after being
>> >> started.
>> >> Was gutless; and pressing on the gas pedal didn't do anything useful.
>> >> I
>> >> mean, the engine kind of sped up a bit, but let's just say that
>> >> someone
>> >> honked at me in irritation 'cause it took me so long to cross the
>> >> street.
>> >>
>> >> But after a few moments, the engine got with the program and gave no
>> >> trouble for the rest of the trip . . . until I parked the van, went
>> >> into
>> >> some store to find something pretty for Mrs Squirrel, came back out,
>> >> started the van and the whole gutless thing started over again.
>> >>
>> >> There's something fishy going on.
>> >>
>> >> --
>> >> Mike "Rocket J Squirrel" Elliott
>> >> 84 Westfalia: Mellow Yellow ("The Electrical Banana")
>> >> 74 Westrailia: (Ladybug Trailer company, San Juan Capistrano, Calif.)
>> >> Bend, OR
>> >> KG6RCR
>> >
>> >
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