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Date:         Sat, 18 May 2002 20:24:01 -0400
Reply-To:     jhlauterbach <jhlauterbach@MSN.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         jhlauterbach <jhlauterbach@MSN.COM>
Subject:      Re: Rough Idle on 84 Vanagon 1.9L - Help
Comments: To: Gtciolfi@AOL.COM

Have you changed out the distributor cap, rotor, and high tension wires? Are the seals around oil filler tube and dipstick okay? When you put a timing light on and have the idle stabilizer bypassed, where are you and what RPM is it running?

John Lauterbach Macon, GA '84 7-passenger

----- Original Message ----- From: "George Ciolfi" <Gtciolfi@AOL.COM> To: <vanagon@GERRY.VANAGON.COM> Sent: Saturday, May 18, 2002 7:43 PM Subject: Rough Idle on 84 Vanagon 1.9L - Help

> Hi, > > New to this list.. Hope someone can help. I've got a rough Idle problem > with my 84 vanagon. I have replaced/checked/swapped out with spare parts the > following items with no change in idle quality: Rebuilt injectors, new fuel > pressure regulator, new air flow meter, new coil, control unit (swapped with > junk yard one - no change). I checked all of the voltages/resistances at the > connector for the ECU they look ok. I sanded all of the eyelets for the > grounds in the wiring harness. I checked for vacuum leaks by wiggling hoses > and also spraying ether at all aconnections to look for increase in idle. > > I have not set the co after replacing the engine (from Boston Engine) but a > slow turning of the air adjustment screw all throught the range doesn't > smooth it out. > > Here's the part I'm wondering about - When I try to time the thing, the > timing bounces constantly varying around an average of 5 deg, and sometimes > jumps a bit more. I did have the idle stabilizer plugs connected together. > I am wondering if it could be the hall control unit. My understanding is > that this and the idle stabilizer are the only things that set timing, based > on engine speed as measured by the hall effect wheel in the distributor (well > there is also vac advance and retard, now that I think about it I should > check stability of timing with these disconected). > > Any thoughts? What should I do to diagnose this stuff. > > Any help is much appreciated. > > George >


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