question has anyone seen this idle screw backed all the way out.. could a faulty turn screw cause issues?.
or maybe a worn body near the screw.. air leaks??

also what everyone has posted is dead on as far as adjustment of this, tricky but some vans reject adjustments..

Joe

-----Original Message-----
>From: dylan friedman <insyncro@YAHOO.COM>
>Sent: Aug 21, 2007 8:39 AM
>To: vanagon@GERRY.VANAGON.COM
>Subject: Re: Rough running till warmed up
>
>I set idle by ear now.
>I agree with the range, but find each van to be a little bit different.
>My Carat would idle just below 900 and was smooth as silk.
>My 91 Syncros idle above that closer to 1000+, both just as smooth, just higher revs.
>I tried getting them all to the same rpm while they were sitting next to each other, but something would not be right in each case.
>Go with what works and the numbers are just a baseline to start from.
>
>dylan
>
>
>David Kao <dtkao0205@YAHOO.COM> wrote: I guess the way I stated it is misleading. But if you have a strong
>engine you will experience it yourself.
>
>Vanagon's idle can be set to within 900 - 1000 RPM or even faster.
>People tend to set it a little slower toward 900 rather than toward
>1000, including myself. Whenever I did that the engine would perform
>poorly. I had to go back and turn the idle adjustment screw CCW half
>a turn. It would be like give a kick to the engine and you would feel
>a significant jump in acceleration.
>
>So you are right, it is not because turning up the adjustment screw
>gives it more power. It is only to set it to what it should be. Idle
>setting has an implication to engine gas mileage. But engine performance
>will suffer if the idle was set to too low. I made the mistake all the time.
>Had to force myself to turn that screw back up a bit.
>
>David
>
>
>
>
>
>
>--- Mike S  wrote:
>
>> At 01:15 AM 8/21/2007, David Kao wrote...
>> >Try to turn the idle adjustment screw CCW half a turn to one or two
>> >turns. This should make some improvement for the idle. If the idle
>> >becomes
>> >too fast then turn it back half a turn. Usually this will improve
>> >horse power quite a bit.
>>
>> I've seen this claim a few times. Why would that be the case?
>>
>> Isn't the idle screw simply an air bypass in the throttle body? How
>> does changing the small amount of air which is allowed to bypass a
>> closed throttle plate have any significant effect on the amount of air
>> which flows when the throttle is fully open?
>>
>
>
>
>
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