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760 coil testing 700 1984

uid 18083's pic
posted by  lucid on  Wed Feb 2 09:53 CST 2005
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last visit: Fri Oct 24 12:31 CST 2014
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*edit* I also have power at the negative terminal when cranking, which would indicate that the power stage is ok, correct?!?

• No—the power stage is supposed to ground the coil negative side every time a spark is required. If that neg terminal stays at the + voltage (coming thru from the + terminal), the power stage is not working.
Did you check the ground connections on the intake manifold that Chrissij mentioned? And take the PS plug off and on a couple of times to maybe clean the contacts?

Having power at the + and - coil terminals, but no spark, indicates a bad coil, right?

• Again no—as explained above. I think you might test the coil by using a jumper wire with one end grounded, then momentarily touch the other end to the coil negative (with no onther wire connected there) and you should get a spark when the jumper wire is removed.




--
Bruce Young
'93 940-NA (current) — 240s (one V8) — 140s — 122s — since '63.






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New 760 turbo won't start...Save it from the junkyard! [700]
posted by  mikeb23ft  on Tue Feb 1 10:02 CST 2005 >


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