[s-cars] Bad Coilpack? Coilpack wiring test?

[Nathan Belo]

Car has been missing, so I swap out plugs & coil lead connectors for new
ones to no avail.  So I swap out POS & do the pull the electrical connection
to the injector test to find out #4 cyl. is not firing.  I've replaced POS
twice already & it appears I bought an extra one that I don't need now. I
pull the plugs & all of them have carbon deposits except #4 which is shiny
brand new.  I talked to SJM & he said normally he sees failed coils under
high boost, so I test for spark by grounding the spark plugs onto the valve
cover like SJM said.  Sure enough no spark to #4.  Bad Coil?  Is there a way
to test if there's a wiring problem?

I had this problem last year about this time & it mysteriously fixed itself.

How hard is it to re-wire a new coilpack?  I can see that the wires go to
the plastic plug on the firewall.

I have 169K miles.

-- 
'01 Ducati 750 Monster Dark, like the owner & I ride naked!
'92 Audi //S4 IA III+ w/95.5 S2 (CGR) 6-spd Pearl/Ecru
Nathan Belo
Associate Broker (Residential, Commercial, & Business Opportunities) &
Notary Public
Skyline Properties, Inc.
9709 3rd Ave NE, Suite #500
Seattle, WA  98115
206.686.8989 Accessline Voice/Fax

"Brake later & open the throttle before normal"- Valentino Rossi