X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from qmta12.emeryville.ca.mail.comcast.net ([76.96.27.227] verified) by logan.com (CommuniGate Pro SMTP 5.3.5) with ESMTP id 4220849 for flyrotary@lancaironline.net; Wed, 14 Apr 2010 01:15:33 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.27.227; envelope-from=n3773@comcast.net Received: from omta22.emeryville.ca.mail.comcast.net ([76.96.30.89]) by qmta12.emeryville.ca.mail.comcast.net with comcast id 5H6X1e0021vN32cACHEz91; Wed, 14 Apr 2010 05:14:59 +0000 Received: from rv8 ([71.237.248.186]) by omta22.emeryville.ca.mail.comcast.net with comcast id 5HKz1e00L422aQ78iHL0X4; Wed, 14 Apr 2010 05:20:00 +0000 Message-ID: <1B5C7F933EED45EF9EF20BED078B1E82@rv8> Reply-To: "kevin lane" From: "kevin lane" To: "flyrotary" Subject: timing light/plug wires Date: Tue, 13 Apr 2010 22:14:52 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000E_01CADB56.BDA8FF00" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5843 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5579 This is a multi-part message in MIME format. ------=_NextPart_000_000E_01CADB56.BDA8FF00 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable today I pulled all the plugs and my DIS system apart. the engine runs = rough/starts hard and the timing light only flashed on some wires[yes, I = had the clip in the right direction]. however, I was able to get a = spark [visually with plugs removed] on all the plugs[using all 3 = ignitions systems I have for lead/trailing plugs], even tho' the timing = light didn't flash all the time. I tried switching wires and some wires = will trigger the timing light,some won't, even tho' the plugs were = firing. my DIS pick-ups were easily triggered by passing a screwdriver blade = past them. the spec'd .08" gap seems ridiculous when .125" is more than = sufficient. testing continuity of the wires was odd. volt meter would beep once, = then stop, whereas holding the probes together creates a constant = beeping. perhaps a high resistance wire does this? since I built the DIS ignition, and my engine won't go past 1500rpm, I = first suspected the ignition has problems. however, the pick-ups all = seem to work, I put new plugs in, I visually saw them sparking. perhaps = it is a fuel pressure issue, since I still haven't installed a fuel pump = and have, like, .93 psi to the carb. maybe the timing light doesn't = work with these plug wires [blue silicon, spiral wound - originally used = with Jeff rose elect ignition on my Lycoming] and is confusing me [altho = it seems like it should work or not work, why would some wires trigger = it and some not?] any ideas? should I buy new wires and start over? KevinLane Carpentry www.KevinLaneCarpentry.com ------=_NextPart_000_000E_01CADB56.BDA8FF00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

today I pulled all the plugs and my = DIS system=20 apart. the engine runs rough/starts hard and the timing light = only=20 flashed on some wires[yes, I had the clip in the right direction]. = however, I was able to get a spark [visually with plugs removed] on all = the=20 plugs[using all 3 ignitions systems I have for lead/trailing plugs], = even tho'=20 the timing light didn't flash all the time. I tried switching = wires and=20 some wires will trigger the timing light,some won't, even tho' the plugs = were=20 firing.

my DIS pick-ups were easily triggered = by passing=20 a screwdriver blade past them. the spec'd .08" gap seems = ridiculous when=20 .125" is more than sufficient.

testing continuity of the wires was = odd. =20 volt meter would beep once, then stop, whereas holding the probes = together=20 creates a constant beeping. perhaps a high resistance wire does=20 this?

since I built the DIS ignition, and my = engine=20 won't go past 1500rpm, I first suspected the ignition has = problems. =20 however, the pick-ups all seem to work, I put new plugs in, I visually = saw them=20 sparking. perhaps it is a fuel pressure issue, since I still = haven't=20 installed a fuel pump and have, like, .93 psi to the carb. maybe = the=20 timing light doesn't work with these plug wires [blue silicon, spiral = wound -=20 originally used with Jeff rose elect ignition on my Lycoming] and is = confusing=20 me [altho it seems like it should work or not work, why would some wires = trigger=20 it and some not?] any ideas? should I buy new wires = and start=20 over?

KevinLane Carpentry
www.KevinLaneCarpentry.com=

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