Join Date: Jun 2005
Location: Conyers/McDonough, GA
I listened to your audio, it is muted.
I hear a recurring sound which is probably the de-compressor exhaust lobe.
When you pull the spark plugs and lay the shell of the spark plug on the cyl head do you see sparks at the gap when the engine is cranking????
Valkrider mentioned rubbing of insulation caused a coil wire to be Grounded.
If the Yellow/Blue or Blue/Yellow are grounded the coil is ON but a spark is only produced when the ECM releases a Ground.
Ground is the trigger, false ground from a short, true ground from a ECM, This scenario also has happened with Injectors.
Other times the ECM side (Trigger) has been grounded by shorting on a harness clip at the breakout at the Injector wires.
There have been a few cases where wires have shorted. A few times the the Black/White wire was shorted and blew the 30 amp FI fuse.
Remove the ECM connectors look for the wires going to the IGN coils(Yellow/Blue or Blue/Yellow) and the Injectors(Pink/Blue or Pink/Yellow)
With IGN switch ON, verify +12v on Black/White wires, then pulse a Ground on each Ignition coil and Injector.
You should see an arc at the spark plug, you should hear the injector click when energized.
Do both cylinders, all spark plugs out and shell Grounded.
NOTE:: When the Black/White wire has +12v on it, each coil and Injector will have that voltage on the ECM wire.
That is the first test for continuity through the coil or injector.
Do you have any FI error codes from the FI indicator?
What is the Autolite spark plug you are using???
Do you have a Service Manual??
2005 1300c Red, Mustang seat, HK 2.5 straights. Leds for safety-front & back. 190,260 VTX miles
Last edited by Hans&Feet; 05-12-2019 at 09:48 AM.
Reason: Added/updated a drawing, added questions...