Date: Wed, 17 Jun 2015 09:11:09 -0700
Reply-To: PB <pbrattan@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: PB <pbrattan@GMAIL.COM>
Subject: Re: Engine hesitates upon take off
In-Reply-To: <5580A35B.8020207@turbovans.com>
Content-Type: text/plain; charset=UTF-8
My 90 Westy automatic has done the exact same thing ever since I had it.
I'd like for it to drive like without the brief hesitation after a stop,
but thankfully, it has never stalled or failed to start. Thanks to this
forum, I've been much better about taking it in for routine service than I
have with my 2002 Jeep Liberty! I'm getting an idea of what I should
discuss with my mechanic the next time I take it in for routine servicing.
Patti
On Tue, Jun 16, 2015 at 3:29 PM, SDF ( aka ;jim lahey' - Scott ) <
scottdaniel@turbovans.com> wrote:
> it would be handy to have another AFM to try.
>
> Someone mentioned dead spot on your AFM's sweeper contact area ( under
> the black cover ) .
> I'll go along with that idea.
>
> I had two cases that were clearly the AFM ..
> first one was an 84 auto trans Westy ...would just 'cut out for a
> fraction of a second at 70mph ..
> I think that was a dead spot on the AFM sweeper for sure .
>
> another one was a Syncro with 2.1 engine...
> very subtle uneven running right at 3,100 to 3,200 rpm. Some people
> wouldn't even notice it.
> I was reluctant to diagnose 'new AFM' needed as a new one was $ 500.
>
> when I found a piece of gear tooth on the trans magnetic drain plug the
> van's owner said to rebuild trans, and replace clutch and starter ,,
> so with all that .hey ..what's another 500 dollar part, right ?
>
> the new AFM fixed that subltle uneven running for sure.
>
> you should at least have a spare to experiement with.
> I would still go over those things I mentioned.
>
> here is one of my long-time diagnostic rules..
> when you 'get lost' ....start over.
>
> Start over With the Basics ...
> and keep doing that until either you find something you missed..
> or you learn something new and subtle ..
> 'eventually' you'll get it fixed with that method.
>
> lol...one engine I worked on would barely run ..just awful ...loads up,
> wouldn't wind out ..wouldn't run worth beans..
> and one by one things that were not right were found ..
> significant things ...like 8 'wrong or worn out things' in the course
> of a week working on it ..
> and yet..
> the same symptoms persisted.
>
> Also ran up against lack of money for 'test parts' like in your case a
> known-good AFM ..
> lack of parts for that model and lack of tech info too .
> I would have invested in a throttle body in that particular case buy the
> owner didn't want to.
> lol..that case is still 'pending'.
>
> as always .."it's just a blockage or leakage of fluids or electrons."
> I promise you that.
>
>
>
> On 6/16/2015 9:02 AM, Rocket J Squirrel wrote:
>
>> Thanks, Scott.
>>
>> I've been through all of these at one point or another when trying to
>> solve my van's famous "it cuts out repeatedly for a few seconds every
>> minute or so when driving up very steep grades for a long period of time
>> in very hot weather" issue.
>>
>> --
>> Jack "Rocket j Squirrel" Elliott
>> 1984 Westfalia, auto trans,
>> Bend, Ore.
>>
>> On 06/15/2015 07:15 PM, SDF ( aka ;jim lahey' - Scott ) wrote:
>>
>>> the normal thing to check or think about in a case like this is Temp
>>> Sensor II ..
>>> there are two by your thermostat ..
>>> a single contact for the gauge ..
>>> the other one ...check the resistance of that one and compare that to
>>> what Bentley says.
>>>
>>> also ..super important and I find them off all the time..
>>> idle switch not making contact at idle.
>>>
>>> you might look for tiny air leaks ..( like with spray carb cleaner or a
>>> listening hose ).
>>> I had one engine that
>>> when given throttle it would moan like air was being drawn in ..
>>> and it ran medium OK ..
>>> but it seemed very much like it was not getting the fuel injected to go
>>> with the air.
>>>
>>> on that one I found really ..at least 10 tiny air leaks at the intake
>>> runners..the plenum ..and the throttle body connection
>>> and that was it.
>>>
>>> do these 3 things and there's a fair chance you'll find some some
>>> things not exactly right.
>>>
>>> On 6/15/2015 10:23 AM, Rocket J Squirrel wrote:
>>>
>>>> I've had this same problem for years. But different: mine's a 1.9L, and
>>>> the problem occurs in cold (read freezing or below) temperatures,
>>>> with a
>>>> cold engine. I have this mile-long generally downhill street I go down
>>>> when I leave the house. It's not long enough for the engine to warm up.
>>>> At the bottom is a stoplight. Usually red, as such things go. The
>>>> street
>>>> turns uphill at this point so there I sit at the limit line with the
>>>> nose of the van pointing up a very slight grade, the engine idling, a
>>>> minute or so, then the light turns green, I press on the gas, and the
>>>> engine grumbles and barely moves the van. Sometimes the engine just
>>>> dies
>>>> and I have to restart it to proceed. Not until I've crossed the
>>>> intersection does it seem to have any power. It's an auto trans so I
>>>> don't have the luxury of revving the engine and feathering the
>>>> clutch to
>>>> get across the intersection. A bit of an inconvenience to myself and
>>>> those behind me.
>>>>
>>>> Once it warms up it's fine.
>>>>
>>>> Why does it do this? I don't know. The number of things that would need
>>>> to be disassembled and tested (or just blindly-replaced) to try to fix
>>>> the problem is daunting. I'll take the slight inconvenience.
>>>>
>>>> --
>>>> Jack "Rocket j Squirrel" Elliott
>>>> 1984 Westfalia, auto trans,
>>>> Bend, Ore.
>>>>
>>>> On 06/15/2015 07:25 AM, Rick Cooper wrote:
>>>>
>>>>> I've noticed that when accelerating from an intersection, after
>>>>> sitting at
>>>>> a red light, my 2.1 WBX will sometimes hesitate for 5 to 15 seconds.
>>>>> I'll
>>>>> start moving, but the engine has no power and giving it more gas does
>>>>> nothing. After those few seconds, the engine will start to pick up
>>>>> power
>>>>> and soon everything will be running fine.
>>>>>
>>>>> This has just start happening and is still sporadic, but it is
>>>>> becoming
>>>>> more frequent. Seems to only happen after a full stop, like at a red
>>>>> light. Would this be a clogged fuel filter or what?
>>>>>
>>>>> Thanks for any ideas. FWIW, the fuel tank and the ECU were replaced
>>>>> a few
>>>>> years ago.
>>>>>
>>>>> Rick
>>>>>
>>>>>
>>>>
>>>
>>
--
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