N-body help needed

[Shannen Durphey]

Doug Mansfield wrote:
> 
> I am working on a 92 GM Pontiac Grand Am with the 3.3L V-6 (auto).  It has
> developed a miss.  I found and replaced a bad ignition coil and plug wires,
> but the problem continues.
> 
> This is a DIS? system.  Three coils (wasted spark).  I replaced one coil
> after finding the secondary windings were open.  But cylinder #4 (from that
> replaced coil) still has a miss.  I scanned the web and noticed rough idle
> and ignition misses seem to be common with this car.  Where should I go
> from here?  There has never been an engine light (no stored codes).
> 
> With this being a common problem, I though this is the place to ask.
> 
> Thanks for any help.
> 
> Doug
> mansfield at cns.ohiou.edu

Use an old spark plug opened up to .1" gap to test for spark at each
coil wire.  If all cylinders have spark, try unplugging one injector
at a time then reconnecting to locate cylinder.  Remove the plug for
that cylinder.  If it's dry, likely not getting fuel (but could be
intake valve staying closed).  If wet, could be bad plug or mechanical
problem.
Shannen