2004 Ford Ranger Edge SuperCab
3.0 Vulcan pushrod motor
265000km
New spark plugs and wires
Front pads
Front control arms/ ball joints
Rear drum hardware kit/brake assembly
Right rear brake cylinder
New ebrake cables
New right rear axle seal
C bearing for the differential
Crankshaft position sensor
New Coil Pack
New injectors
New Water pump and gasket kit
New Timing cover/gasket kit
New timing chains

Differential flush / gasket
Coolant flush

I've done a compression test all cylinder tested fine.

Opened the pcm everything good on the circuit board.

The spark for cylinder 4 is intermittent
Ex
Cylinder 1 0
Cylinder 2 0
Cylinder 3 0
Cylinder 4 -30
Cylinder 5 0
Cylinder 6 0

That's what the spark looks like
On idle.

I've always had a misfire in cylinder 4 only on idle
For example at a red light if I sit for too long it will misfire but only cylinder 4
It's will stumble for a couple secs with engine light flashing
Then it will stay solid and misfire is gone
A little help

 

Duplicate, read here: https://www.ranger-forums.com/2-9l-3...e-only-151621/