Mailing List flyrotary@lancaironline.net Message #50906
From: Steve Parkins <momsblacksheep@msn.com>
Subject: RE: [FlyRotary] timing light/plug wires
Date: Tue, 13 Apr 2010 23:31:51 -0700
To: flyrotary <flyrotary@lancaironline.net>
did you say . 93 or 93. or 9.3 ?
i had a hot saw with a good looking wire pulled very hard,but it would not get hot ??. so we did as you did with the beeper thingy, now get this....no beep.
some how it was still willing to cut just as long as we didn't need volts though it. perhaps your wires have given up the ghost the same way ??  low fuel is my guess.
just did a mazda truck rollover and it ran for quite a spell upside down (what were they doing,laughing at it at the crash site?). could get it to do anything but 700-900 rpm
bad fuel pump was the fix
not a mec; but food for brunch.


steve parkins



 

To: flyrotary@lancaironline.net
From: n3773@comcast.net
Date: Tue, 13 Apr 2010 22:14:52 -0700
Subject: [FlyRotary] timing light/plug wires

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


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