Scamby Posted May 23, 2020 Report Share Posted May 23, 2020 Greetings, I am experimenting possible misfires issues with my car. It happens after the car is running after a while driving which means like when the engine bay is really hot. The car starts to misfires even at little load. I checked everything and is good in terms of fuel (pump and injectors which by the way are new from DW) base pressure looks good also. When I checked the last time the coil was burned (picture attached) which tells me that there is a problem with the dwell. The coil was brand new. I changed the coil with another one that I have spare and the car starts to work fine until I am starting to have the same issue again. The dwell time for this car (Mazda 323 GTX Turbo BP 1.8) is 3.5ms which is right. Because is a distributor as the rev increase the ECU should decrease the dwell but not much as this will create a weak spark and under boost is not good. But when I checked the logs I see spikes of dwell times of 3.8 and up which is not right. I think of the last burn coil and because now I am starting experimenting the same issue with the spare coil and what I am seeing in the logs with the dwell, I am pretty sure I have something wrong with the dwell configuration that could be frying the coil. For what I understand the ECU must not send more than 3.5 ms of dwell at any time. Logs and .pcl file attached. Please advise. Regards. Mazda 323 GTX Map Dwell.pclr Log 2020-05-23-10-59-45-am.llg Quote Link to comment Share on other sites More sharing options...
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