2. Wait for the engine to cool completely before removing the spark plugs.
3. In order to provide access to the candles, unscrew the three screws that secure the cover installed on top of the throttle body. Note that the front screw is longer than the other two. Release all hoses and wires from the latches on the underside of the cover, then remove the cover.
4. If there is no factory marking on the spark plug wires, mark the wires yourself with adhesive tape in accordance with the numbering of the cylinders (the first is considered closest to the timing belt). Be careful not to damage the wire insulation.
5. The tips of the explosive spark plug wires are equipped with metal heat shields. Carefully remove the tips from the shank of the candles (to avoid damage to the contact terminal, pull only on the tip, and in no case on the wire itself).
6. Before turning out the candles, remove small debris and dirt from the candle niches - use a small brush, or blow the niches with compressed air (you can use a regular bicycle pump).
7. Using a special key equipped with an elastic insert, turn out the spark plugs. To avoid damaging the threads, be careful not to twist the spark plugs when turning them out.
8. The external condition of the candles can give a lot of useful information about the degree of engine wear. If the working end of the spark plug is shiny and free from plaque and deposits, then the air-fuel mixture is too lean in the combustion chambers, or the spark plug has an excessively high glow number (heat removal from the electrodes in a hot candle is less intense than in a cold one).
9. If the working end of the plug and the inner center insulator are covered with a thick layer of sooty deposits, then the mixture is too rich. The black color of the working part of the candle, combined with traces of oil, indicates internal engine wear, or also excessive enrichment of the mixture.
10. A golden or greyish-brown coloration of the working part of the spark plug is evidence of the correct layout of the air-fuel mixture and the good internal condition of the engine.
11. Skoda engines in question use multi-electrode spark plugs (see accompanying illustration). Interelectrode gaps on such candles are set at the factory and are not subject to adjustment.
12. Further description of the procedure is given in SectionReplacing Spark Plugs - 1.3L Models, dedicated to 1.3 liter models.
13. In conclusion, having connected the wires to the BB candles, reinstall the throttle body cover, firmly tightening the screws of its fastening.