Patches Posted September 23, 2019 Report Share Posted September 23, 2019 Hi I'm having an issue with my car misfiring at load recently and its made me revisit the ignition settings. I've got an unbranded Gen 1 Ford Zetec wasted spark coil pack which im driving with a bosch 200 style ignition amplifier. Car was mapped to 184 hp at the hubs 3 months ago and has been driving fine, dyno owner did mention that my dwell time looked a bit long but I'm having a tough time finding the data. I'm wondering if perhaps anyone had the correct settings for this coil pack? I've got the following settings Ignition Mode: Wasted Spark Spark Edge: Falling (I think this should perhaps be rising? has been set to falling for a while and works so not sure) Dwell Mode: ms Ignition Delay: 50 us Spark Duration: 1ms Max Advance: 40.0 BTDC Current Dwell Table: Quote Link to comment Share on other sites More sharing options...
Adamw Posted September 23, 2019 Report Share Posted September 23, 2019 Your ignition settings are all ok. Your dwell table looks abut right, maybe a little on the weak side. As a test put 3.0 in all the cells I highlighted below to see if the misfire goes away. Make sure the centre pin of the ignitor has a solid ground back to the engine block. Are you sure it is an ignition problem - are there any trigger errors or anything else showing in the log? Quote Link to comment Share on other sites More sharing options...
Patches Posted September 23, 2019 Author Report Share Posted September 23, 2019 Great, I'll give that a go. No triggering errors in the logs I have, I'll make that change and take some new logs hopefully that will fix it. I'll double check the wiring. It's a bit of an intermittent fault, happens more often in lower gears. Car starts backfiring and losing power which i assume is an ignition problem but I'm not sure so just thought I would double check I had the right ignition/dwell settings to rule that out. Quote Link to comment Share on other sites More sharing options...
Patches Posted September 24, 2019 Author Report Share Posted September 24, 2019 That seems to have fixed the issue, no misfires on the drive home, this might explain the slightly lower than expected power figure I got at the dyno a few months back. Thanks @Adamw! Quote Link to comment Share on other sites More sharing options...
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