07-23-2009, 08:52 PM
Join Date: Nov 2008
Location: Jax Beach, FL
Total Cats: 0
Single spark when cranking then no ignition
I am having an issue with getting a single spark when I first crank, then I am not getting any spark from the ignition (coil packs).
I believe this is tied to the issue I was having of the spark blowing out at mid/high rpm, but I am not sure.
I was trying to adjust my timing to correct this issue and after adjusting the timing though megasquirt (and rewiring my fans) I got an issue of not appearing to get spark on hot start, but cold start was fine and it would run hot.
I let the car sit for a couple weeks and now I am only getting a single spark (cylinder 1) on first crank, then no spark. Using a "dummy light" there is power at the crank angle sensor, ignition and ignitor. However, I am not seeing any pulsation on the "dummy light" from the signal wires to the coils. I have also checked this on cyclinder 1 and 3 (I believe) with grounding a spark plug to look for spark and got the same results as the "dummy light"
My ampmeter is not working (I ordered a cheap one and a really cheap old Fluke) to help for future electrical issues.
I have trial fitted an igition coil and I changed the crank angle sensor (both with used parts from Johnmatt that should be good, but the problem did not change with either part.
I am kinda stumped, I could try a ignitor, or tearing into the megasquirt to look for a blown component, but I am fairly lost as to what to do. As far as I can tell there is a lack of sigal to spark.
I posted about this same topic under a thread for a 1.6 that was having spark issues on crank, but his appeared to be timing not total lack of spark.
Thanks for reading this overly long post.