Date: Tue, 5 Oct 1999 21:27:02 EDT
Reply-To: kenneth d lewis <kdlewis@JUNO.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: kenneth d lewis <kdlewis@JUNO.COM>
Subject: Re: Can't adjust idle (was High RPM miss)
Gary;
I am going to theorize on the problem of not being able to adjust
the idle with the idle adjust screw. The way I would approach this
problem is to think of high idle as if you are holding the gas pedal down
slightly i.e. the throttle butterfly is partly open. Is it? Have you
performed the idle stop adjustment as per Bentley? I _ALWAYS_ do this
when I have any kind of suspected FI problem.
Okay, so the butterfly is fine. Next check the idle position
switch as per Bentley. I can not stress enough how important it is to
follow the Bentley procedure to the letter.
Next I would check the case integrity for air leaks. Any opening
will allow large volumes of air to be sucked through the case by the
crankcase ventilation system. I corresponded with a fellow on a similar
problem. We finally zeroed in on the small doughnut seal at the base of
the dipstick!
Another problem is missing doughnut seals at the base of the fuel
injectors. Let me know what you find.
Drive Safely & Good Luck
Ken Lewis<Kernersville,NC>86 VW crewcab;60 T-5 Coupe
On Tue, 5 Oct 1999 02:47:50 -0500 Gary Basey <gbasey@LINK2000.NET>
writes:
>This is a multi-part message in MIME format.
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>A couple of weeks ago I posted a message to both this list and the
>type =
>2 list
>about my poor '80 vanagon. I've been trying to diagnose a high RPM =
>misfire for
>about three months. Everything that you have suggested has made the
>van
>run better (lots better!) but the high RPM miss is still there. It
>only =
>occurs when I
>accelerate quickly (floor it). If I go smoothly the engine doesn't =
>misfire till around
>55-60 mph when I have the accelerator is all the way down.
>
>Any suggestions? (I have replaced coil, plugs, wires, distributer,
>cap, =
>rotor, fixed vacuum leaks and cleaned the AFM)
>
>I have been trying to adjust the idle to the proper setting so that I
>=
>can set the timing
>properly (I replaced the distributor as the other one was wore out).
>=
>Which leads me to my next problem.
>
>Turning the idle adjusting screw makes no difference in idle speed. I
>=
>have searched the archives and tried everything. =20
>
>1. Does anyone have a suggestion of what the cause might be? This is
>a =
>2.0 liter air-cooled with California emissions (i.e. electronic =
>ignition, O2 sensor, cat., etc.).
>
>2. Do you think that my high RPM misfire could be the result of this
>=
>problem? I was thinking that since I couldn't set the Idle correctly
>=
>the timing might not be correct.
>
>
>Any help would be greatly appreciated!!!!
>
>Thanks for all your help.
>
>Gary
>
>'80 westy=20
>
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><!DOCTYPE HTML PUBLIC "-//W3C//DTD W3 HTML//EN">
><HTML>
><HEAD>
>
><META content=3Dtext/html;charset=3Diso-8859-1 =
>http-equiv=3DContent-Type>
><META content=3D'"MSHTML 4.72.3110.7"' name=3DGENERATOR>
></HEAD>
><BODY bgColor=3D#ffffff>
><DIV><FONT color=3D#000000 size=3D2>A couple of weeks ago I posted a =
>message to both=20
>this list and the type 2 list</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2>about my poor '80 vanagon. =
>I've been=20
>trying to diagnose a high RPM misfire for</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2>about three months.
>Everything =
>that you=20
>have suggested has made the van</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2>run better (lots better!) but the
>=
>high RPM miss=20
>is still there. It only occurs when I</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2></FONT><FONT size=3D2>accelerate =
>quickly (floor=20
>it). If I go smoothly the engine doesn't misfire till =
>around</FONT></DIV>
><DIV><FONT size=3D2>55-60 mph when I have the accelerator is all
>=
>the way=20
>down.</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
><DIV><FONT size=3D2>Any suggestions? (I have replaced coil,
>plugs, =
>wires,=20
>distributer, cap, rotor, fixed vacuum leaks and cleaned the =
>AFM)</FONT></DIV>
><DIV> </DIV>
><DIV><FONT color=3D#000000 size=3D2>I have been trying to adjust the =
>idle to the=20
>proper setting so that I can set the timing</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2>properly (I replaced the
>distributor =
>as the=20
>other one was wore out). Which leads me to my next =
>problem.</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
><DIV><FONT color=3D#000000 size=3D2>Turning the idle adjusting screw =
>makes no=20
>difference in idle speed. I have searched the archives and
>tried=20
>everything. </FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
><DIV><FONT color=3D#000000 size=3D2>1. Does anyone have a =
>suggestion of what=20
>the cause might be? This is a 2.0 liter air-cooled with
>California =
>
>emissions (i.e. electronic ignition, O2 sensor, cat., =
>etc.).</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
><DIV><FONT color=3D#000000 size=3D2>2. Do you think that my high
>=
>RPM misfire=20
>could be the result of this problem? I was thinking that since I
>=
>couldn't=20
>set the Idle correctly the timing might not be correct.</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
><DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
><DIV><FONT color=3D#000000 size=3D2>Any help would be greatly=20
>appreciated!!!!</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
><DIV><FONT color=3D#000000 size=3D2>Thanks for all your =
>help.</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
><DIV><FONT color=3D#000000 size=3D2>Gary</FONT></DIV>
><DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
><DIV><FONT color=3D#000000 size=3D2>'80 westy =
></FONT></DIV></BODY></HTML>
>
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