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Re: [GMCnet] Reviving the Cad 500 [message #163311 is a reply to message #163309] Sat, 17 March 2012 20:15 Go to previous messageGo to previous message
ljdavick is currently offline  ljdavick   United States
Messages: 3548
Registered: March 2007
Location: Fremont, CA
Karma:
Senior Member
Ken,

I'll bet I speak for others when I say how much I enjoy your posts. The way you clearly convey your thought process and discoveries leads us all along with you. Like a great mystery novel we know the hero will win in the end, though some chapters may leave us wondering...

I'm guessing the private correspondence between you and Stick must be publish worthy. We're lucky to have so many really good writers here, but even luckier still to have all us others who are so willing to share! Some people's writing is a mystery, but we usually know what our friend Jim means ;-)

Thanks for sharing.

Larry Davick
Sent from my iPad

On Mar 17, 2012, at 5:40 PM, Ken Henderson <hend4800@bellsouth.net> wrote:

> Ken,
>
> You've warmed the cockles of my heart (whatever the heck that means!).
> Now I don't feel nearly as bad about my week with all it's
> defugalties.
>
> Today went a little better:
>
> I tackled the shorted VSS. Turns out, I'd had to work on it once
> before. There are 3 leads (+12VDC, Gnd, Output) coming out of a small
> molded plastic housing which contains the Hall Effect sensor and
> whatever other circuitry. Those wires have VERY heat sensitive
> insulation and are of larger than necessary gauge. When I worked on
> it before, the length of the accessible wires was left at about 5/16".
> There is no residual insulation on any one of the 3 wires -- just one
> glob through which the wires run. I was able to spread the wires 120*
> apart and solder new long leads to them without creating a new short
> -- at least for now. Then I covered the whole mess with Shoe Goop
> (Yes, that's what I said -- it's good stuff for lots of things and
> sets up fast). Then put a couple of layers of shrink tube over each
> wire, extending down into the Goop. Finally, several layers of shrink
> tube over all 3 wires and the exposed portion of the housing. MAYBE
> it will hold up down there under the exhaust manifold. Or maybe I'll
> soon re-install a short speedometer cable to position the VSS in a
> cooler area.
>
> For the first time, I disassembled the whole VSS. Its housing
> consists of two shells sealed with a gasket and held together with 4
> machine screws. In one half is a wheel containing magnets oriented
> perpendicular to the above mentioned sealed module. As one pole of a
> magnet passes the Hall Effect sensor, the output line is Set. When a
> pole of the opposite polarity passes, the output line is Reset. So,
> the establishment of the "2-pulse" or "4-pulse" or other rating is
> determined by the number of magnets in the molded magnet wheel -- sort
> of like the Pertronix ignition modules. It's easy to test -- don't
> need the 'scope or rotary driver I've used in the past: Just supply
> power and monitor the output with an analog meter -- or possibly a
> test lamp or LED.
>
> Another good event today: I installed the E8094 fuel pump. 17psi max
> vs the 125 psi max E8228. I'd expected to have to touch up the
> regulator setting. Nope. It runs just fine as-is. During a
> subsequent test drive, I even did a full-throttle hill climb which
> called for 96% injector duty cycle -- no sign of any starvation. I'm
> happy.
>
> We'll be making a 200 mile test run tomorrow for Jerry Holloway's
> birthday party. If all goes well, we'll head for Shawnee on Tuesday
> AM.
>
> Ken H.
>
>
> On Sat, Mar 17, 2012 at 7:46 PM, Ken Burton wrote:
>>
>>
>> It is always something extra going wrong.
>>
>> I went out today to replace the engine battery in my airplane and take a flight of about 100 miles. It should ave been a 15 minute job. I immediately got stuck working on two chain saws for a friend who showed up unannounced which put me a several hours behind schedule.
> ...
>> So, Do not feel bad Ken. Nothing ever goes right for me either.
>> --
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Larry Davick
A Mystery Machine
1976(ish) Palm Beach
Fremont, Ca
Howell EFI + EBL + Electronic Dizzy
 
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