Spark plug wires question

Konstantin Bogach konstantin.bogach at morganstanley.com
Fri Dec 26 12:45:14 EST 2003


Phil, forgive me my ignorance.  I never saw a plug cap apart from a wire so
for me it is one piece.
Can I take them apart and connect back without special equipment?  Do you
ever take a wire apart to measure resistance of a wire and a plug cap?
Do you ever replace them separately?

Thank you.

Konstantin.

Phil Payne wrote:

> > To my surprise I discovered that my two 200tq have different resistance
> > of spark plug wires.  Both Bosch with loom, but one has ~6200 Ohm and
> > another ~5000 Ohm.  The spec per Bentley is 5 KOhm.  The car with ~6
> > KOhm wires has good spark.  Spark tester measures 20 KV on coil wire and
> > 10-14 KV next to spark plug.  The car with right (5 KOhm) wires has low
> > KV on the coil wire (coil or power stage is a suspect) so I can not
> > compare KVs measured next to plugs on two cars.
>
> My understanding is:
>
> Distributor cap - 1kOhm
> Wire - 0kOhm
> Plug cap - 5kOhm
>
> --
>   Phil Payne
>   http://www.isham-research.com
>   +44 7785 302 803



More information about the quattro mailing list