2G ignition problem

[Martin Müller]

Hi I have a problem with my GST. The vacuum is alright. But when I go in pressure occasionally misses the ignition of one cylinder. Just discard gear and re-classify and goes back to normal. Thank you for any help.

 

[GSXgreen]

How new are your plug wires?

Are you using the wire separator holders?

 

[TSi-Rocket]

If the plugs and wires are not new I would replace the wires with ngk wires and plugs. Rock auto has the ngk wires for 30$ and plugs are around 2$ each.