My 1997 Aerostar with a 4.0L doesn't start.

[davr7749]

I'm having issues idling my areostar. It seems to have spark and fuel. But stalls right after the key is turned. Fuel pump and filter has been replaced along with spark plugs and ignition wires. I believe the current orientation of the wires is 1-5 2-6 3-4. I could have the order on wrong but I've not gotten a definitive order online. If anyone has the order or any other suggestions.. fuses are all good. I'm starting to suspect the coil.

 

[Josh P]

I had a bad maf sensor cause a stalling issue, unplug the sensor and see if it stays running

 

[davr7749]

I had a bad maf sensor cause a stalling issue, unplug the sensor and see if it stays running

View attachment 330113

I've tested the maf sensor while it was running and idle got rough when unplugged so I assume its still functional.

 

[BrooklynBay]

Did you check the idle air control (air bypass) valve?

 

[davr7749]

Did you check the idle air control (air bypass) valve?

I have

 

[BrooklynBay]

The coolant sensor might not be in spec anymore. There's a resistance chart in the photo gallery with the resistance at various temperatures.

 

[don-ohio]

Your coil pack is not in order possibly. The plugs are like the diagram, but the coil pack is switched one position. Other than that, crank position sensor?