stephan777 Posted November 21, 2015 Share Posted November 21, 2015 My car isn't working good. I have a missfire above the 1 bar of boost. New 8mm magenecor cables(2000km old)New ignition rotor(2000km old) Spark plugs(iridium's 7) are 10.000km old I changed for a test run 4 iridium 6 spark plugs and the car drives alot better. I gonna buy some new spark plugs. Which one should i buy? Iridiium 7 or iridium 8 spark plugs? My setup is: Fully forged engine with a td04l turbo on 1.3 bar of boost. Quote Link to post Share on other sites
AdamB Posted November 21, 2015 Share Posted November 21, 2015 Check the distributor cap itself. Quote Link to post Share on other sites
stephan777 Posted November 21, 2015 Author Share Posted November 21, 2015 The distributor cap and the rotor are 2000km old Quote Link to post Share on other sites
5e colin Posted November 21, 2015 Share Posted November 21, 2015 (edited) buy some copper heat 7 plugs ngk bkr7e grade 6 is to low for a bar , make sure there gapped right set them to 0.8mm dont waste your money on iridiums/platinums Edited November 21, 2015 by 5e colin Quote Link to post Share on other sites
AdamB Posted November 21, 2015 Share Posted November 21, 2015 What's the spark plug gap? Grade 6 will be fine for 1 bar boost, no issue. But he's running 1.3 bar, I assume it's on a programmable ecu? Heat range 7 will be best. Quote Link to post Share on other sites
GP82 Posted November 22, 2015 Share Posted November 22, 2015 Also worth checking the coil pack and king lead. Quote Link to post Share on other sites
stephan777 Posted November 23, 2015 Author Share Posted November 23, 2015 King lead is also 2000km old. But i find the problem. The spark plugs are broken.(10.000km old) I changed them and she drives like a monster. Quote Link to post Share on other sites
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