No power at A21/A22, No Spark
Posted: Sun Jan 04, 2026 9:34 pm
Car went from running with occasional incidence where it felt like you turned off key for 1-2 seconds, to crank no start. Re-soldered a few pins on main relay that didn't look that bad, tried another relay, ( not really known good, from toolbox/junkyard, changed coil, ignitor.
Tested according to Helms and have power to all the other 'A's" and grounds on ecu pins/ plug.
Been using AI to probe around ecu traces and been getting some bs leads.
There's continuity to one leg of Q38 from A21and to one leg of a resistor right next to it, forget the number.
Anyone ever fixed this? Perplexity ai says run a jumper from A1 to A21 but I'd like to know which component will repair my ecu properly.
An ecu repair service with 100% feedback(?) on ebay has a customer who discussed sending his in with this issue (no power to ignitor)so I assume that was same issue and he repaired it?
I've been trying hard.
Sure would like to do it here if anyone knows.
Tested according to Helms and have power to all the other 'A's" and grounds on ecu pins/ plug.
Been using AI to probe around ecu traces and been getting some bs leads.
There's continuity to one leg of Q38 from A21and to one leg of a resistor right next to it, forget the number.
Anyone ever fixed this? Perplexity ai says run a jumper from A1 to A21 but I'd like to know which component will repair my ecu properly.
An ecu repair service with 100% feedback(?) on ebay has a customer who discussed sending his in with this issue (no power to ignitor)so I assume that was same issue and he repaired it?
I've been trying hard.
Sure would like to do it here if anyone knows.