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Home » Public Forums » GMCnet » [GMCnet] Reviving the Cad 500  () 1 Vote
Re: [GMCnet] Reviving the Cad 500 [message #163015 is a reply to message #162949] Wed, 14 March 2012 21:29 Go to previous messageGo to previous message
Ken Henderson is currently offline  Ken Henderson   United States
Messages: 8726
Registered: March 2004
Location: Americus, GA
Karma:
Senior Member
Well, I flunked crank-er'-up still again.

I got sort of a late start, but it didn't take long to find out why
the engine wouldn't start: the IGN 10A CB for the EFI was tripping a
couple of seconds after turning the key on -- WUD was very helpful in
discovering that. After trying everything else, I found that the VSS
was shorting the IGN. With it disconnected, the engine still wouldn't
fire. The fuel spray looked a little strange to me, so I added more
gas to the tanks with no improvement. A spark indicator showed
suspiciously weak spark. After too much trying, it finally fired off
and ran for a couple of minutes, then died again. After too much more
trying, it fired off and ran badly for a minute or so before
backfiring and dying again.

After that, it never ran again. During the first short run, I'd begun
to try to set the timing by light. I got it running smoother, but
didn't get it locked down before the engine died. After the second
run I decided to try to at least get the timing closer by light-timing
while cranking. The timing light would only flash intermittently.
After a careful static re-time, I tried again to use the light -- no
flashee.

By the time I reached the conclusion Burton & others have been jumping
up & down trying to tell me, it was too late for me to go get a new
module. Only after I drug my exhausted butt to the shower and supper
did I remember that the Olds in the shop has a 7-pin module in it.
Tomorrow.

I'm getting too old for this foolishness. I just want it to RUN, not
teach me Murphy's Law. :-)

Ken H.
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Ken Henderson
Americus, GA
www.gmcwipersetc.com
Large Wiring Diagrams
76 X-Birchaven
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