JacobsZ Posted March 16, 2013 Share Posted March 16, 2013 Hey everyone! I have just finished reassembling my motor after fixing a headgasket. Before the headgasket the car ran, but stuttered on any acceleration, which i attributed to blown hg. I tried to start it today and only got an occasional backfire. So i put a plug in the main coil wire and i was getting one good spark and the rest were VERY weak, Almost to the point to where i couldnt see them in my pitch black garage. My cranking dwell is 6.0ms just as it was before and i have a brand new hei module. Does anyone have any idea as to why my car would get one good spark and then next to no sparks for the rest of cranking? Quote Link to comment Share on other sites More sharing options...
ozzzzz Posted March 16, 2013 Share Posted March 16, 2013 Have you tried output test mode for the coil? I confirmed the coil driver circuit was working on mine that way. Quote Link to comment Share on other sites More sharing options...
JacobsZ Posted March 16, 2013 Author Share Posted March 16, 2013 Just did output test mode and got the same results. One nice thick spark, and then spaghetti sparks. Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted March 16, 2013 Share Posted March 16, 2013 What type of distributor/ trigger? Why are you using an hei module with MS2? Could you upload your MSQ file so I can see it? Is your rpm signal steady? Quote Link to comment Share on other sites More sharing options...
JacobsZ Posted March 17, 2013 Author Share Posted March 17, 2013 I will upload the msq tomorrow, I am using the '83 dizzy and i meant to say Megasquirt 1. Rpm signal is steady, i have guessed towards the coil. I ordered a new Z31 coil and it should be here tomorrow. Could a bad coil cause weak spark? Quote Link to comment Share on other sites More sharing options...
skirkland1980 Posted March 17, 2013 Share Posted March 17, 2013 (edited) Coil could be bad but probably the settings. Which board are you using? I have no idea why I can't turn off underline! Edited March 17, 2013 by skirkland1980 Quote Link to comment Share on other sites More sharing options...
JacobsZ Posted March 17, 2013 Author Share Posted March 17, 2013 New folder.zip i believe it to be the 2.2 board. heres my msq. Quote Link to comment Share on other sites More sharing options...
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