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Date:         Tue, 3 Oct 2006 10:52:13 -0400
Reply-To:     John Lauterbach <lauterba@BELLSOUTH.NET>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         John Lauterbach <lauterba@BELLSOUTH.NET>
Subject:      Re: Surging 1.9 Vanagon
Comments: To: Tim Demarest <tim.demarest@POBOX.COM>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
              reply-type=response

Tim, I have rebuilt throttle body for my '84 with automatic transmission but I am hesitant about installing it as I live alone and remember how I almost didn't get the original one back one when I installed a Boston Bob long block. How can job be done working alone and not mess things up?

John ----- Original Message ----- From: "Tim Demarest" <tim.demarest@POBOX.COM> To: <vanagon@GERRY.VANAGON.COM> Sent: Tuesday, October 03, 2006 10:28 AM Subject: Re: Surging 1.9 Vanagon

> Lyle, > > DON'T ADJUST THE THROTTLE SWITCH YET!!!... do yourself a favor and remove > the throttle body, and clean it out thoroughly with carburetor cleaner. On > my '85, gunk inside the throttle body was preventing the throttle valve > from closing all the way, so the idle switch was never getting tripped. I > foolishly adjusted the switch without cleaning the throttle body first, > and > had to re-adjust it after the cleaning. > > If you have an '85, then there is a single throttle switch, and it is > mounted under a plate on the throttle body (you'll find it if you follow > my > advice and clean the throttle out). There is a test / adjustment procedure > in the Bentley, you just have to search a bit for this special single-year > throttle switch section. It's only a page or two, and it took me several > trips into the book to find it... until I did, I was as baffled as you are > by the pictures showing obvious, visible switches. Only adjust the switch > if it fails the test procedure *after* cleaning. > > Also, it sounds like you've been spending a lot of time on this machine, > so > I assume you've already cleaned the engine ground stud on the left head, > inspected and cleaned all the connections that go to it, made sure you > have > a good solid ground from the head to the firewall, and inspected all your > vacuum lines and replaced any that are cracked, loose or collapsed. This > routine maintenance (needed by any old vehicle) is cheap, easy, and > necessary before you swap any active parts in the FI system! Bad > electrical > connections and/or weak vacuum will make perfectly good sensors return > false results to the ECU. > > Tim > > At 09:31 PM 10/2/2006 -0700, Resiolute wrote: >>Greg, I don't have those switches on my engine...I see them both in the >>Bentley, but none are on my engine.. it's buck naked right there...just >>the >>idle screw on the throttle..? Lyle >>----- Original Message ----- >>From: "Greg Potts" <greg@POTTSFAMILY.CA> >>To: "Resiolute" <resiolute@copper.net> >>Sent: Monday, October 02, 2006 7:24 PM >>Subject: Re: Surging 1.9 Vanagon >> >> >>> >>>Hi Lyle, >>> >>>Apparently the throttle position sensor switch was made with a plastic >>>sensor that butts up against a steel adjusting screw, After a while the >>>plastic part wears down and the assembly needs to be pulled apart and >>>adjusted to compensate for the wear. >>> >>>At least that's how I recall Frank explaining it to me. >>>Here's what van-cafe has to say about it: >>>T >>>hrottle switch and idle control components - The throttle switch must be >>>both in working order and adjusted correctly. With the engine not >>>running >>>and key turned off, you manually operate the throttle arm back at the >>>engine and see if you hear a click just as you move the throttle on and >>>off the idle or relaxed position. If not, then you should attempt to >>>adjust it. The throttle switch must be adjusted correctly so that the >>>idle stabilizer computer (situated behind the passenger side tail light >>>housing) and idle control valve kick into action when you are in idle >>>mode. If the throttle switch is adjusted correctly and the idle either >>>hangs up at high rpms or the vehicle is prone to stalling, then one of >>>those two components is likely at fault. (Please review Bentley manual >>>procedures on testing these two components). While you are here it's >>>also >>>wise to check the throttle body itself. When you grab the shaft you >>>should be able to rotate it but should not witness significant movement >>>if you try to rock it back and forth. >>> >>>Good Luck, >>> >>>Greg >>> >>>On 2-Oct-06, at 11:26 PM, Resiolute wrote: >>> >>>>Greg, What kind of repair, please explain if possible..? >>>>Lyle >>>>----- Original Message ----- From: "Greg Potts" <greg@POTTSFAMILY.CA> >>>>To: "Resiolute" <resiolute@copper.net> >>>>Sent: Monday, October 02, 2006 1:42 PM >>>>Subject: Re: Surging 1.9 Vanagon >>>> >>>> >>>>> >>>>>Hi Lyle, >>>>> >>>>>Same thing happened with my Dad's 85 sunroof the week I had it at >>>>>Buses Of The Corn. Frank Condelli was there and he was able to make >>>>>it >>>>>better by adjusting the screws on the throttle body. That adjustment >>>>>made if better for a week or so but then the problem came back (which >>>>>he warned me about) ... it looks like the throttle body will have to >>>>>be removed and repaired. >>>>> >>>>></Greg> >>>>> >>>>> >>>>>On 2-Oct-06, at 3:18 PM, Resiolute wrote: >>>>> >>>>>>Greg, It's at idle...when it does it. I'm buying another new ground >>>>>>strap this afternoon, I had them order it for me. I think most if >>>>>>not all is ground related. >>>>>>Lyle Lathem >>>>>>1985 Vanagon GL >>>>>>----- Original Message ----- From: "Greg Potts" <greg@POTTSFAMILY.CA> >>>>>>To: <vanagon@GERRY.VANAGON.COM> >>>>>>Sent: Monday, October 02, 2006 5:37 AM >>>>>>Subject: Re: Surging 1.9 Vanagon >>>>>> >>>>>> >>>>>>> >>>>>>>Hi Lyle, >>>>>>> >>>>>>>Does the surging occur at idle or partial throttle? >>>>>>> >>>>>>>If at Idle it's a problem with the idle stabilizer circuit. Possibly >>>>>>>a mechanical adjustment is required, or it might be a loose or >>>>>>>broken >>>>>>>wire. >>>>>>> >>>>>>>If at partial throttle, it's "Vanagon Syndrome", a fault inside the >>>>>>>AFM. This can be remedied by replacing the AFM or by installing a >>>>>>>patch, see www.vanagon.com for more info. >>>>>>> >>>>>>> >>>>>>>Happy Trails, >>>>>>> >>>>>>>Greg Potts >>>>>>>1973/74/75/77/79 Westfakia "Bob the Tomato" >>>>>>>www.pottsfamily.ca/westfakia >>>>>>>www.busesofthecorn.com >>>>>>> >>>>>>> >>>>>>> >>>>>>> >>>>>>>On 2-Oct-06, at 7:42 AM, Resiolute wrote: >>>>>>> >>>>>>>>One thing I forgot to mention on our 1.9 engine, as I said we are >>>>>>>>having >>>>>>>>problems, with injectors not fireing on the left bank. We also >>>>>>>>once the >>>>>>>>engine is warm, and after being on the road for awhile, is a >>>>>>>>surging engine. >>>>>>>>It idles down, then reves up, idles down and rev's up.. over and >>>>>>>>over...? >>>>>>>>Any ideas on that problem..? >>>>>>>>Thanks in Advance..! >>>>>>>>Lyle Lathem >>>>>>>>1985 Vanagon GL. >>>>>>> >>>>>>> >>>>>>>-- >>>>>>>No virus found in this incoming message. >>>>>>>Checked by AVG Free Edition. >>>>>>>Version: 7.1.405 / Virus Database: 268.12.10/459 - Release Date: >>>>>>>9/29/2006 >>>>> >>>>> >>>>> >>>>>-- >>>>>No virus found in this incoming message. >>>>>Checked by AVG Free Edition. >>>>>Version: 7.1.405 / Virus Database: 268.12.10/459 - Release Date: >>>>>9/29/2006 >>> >>> >>> >>>-- >>>No virus found in this incoming message. >>>Checked by AVG Free Edition. >>>Version: 7.1.405 / Virus Database: 268.12.10/459 - Release Date: >>>9/29/2006 >>> >


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