Need some advice troubleshooting please
Thread Starter
Joined: Jun 2018
Posts: 3
From: Texas
Need some advice troubleshooting please
2004 V6 3.9 177k miles
While driving 70mph on the highway my car started trying to die and back fire. I was able to limp it home but couldn't drive over 30mph without the car acting up. Check engine light came on and scanner said it couldn't read engine speed and that the crankshaft sensor could be the problem. I replaced the crankshaft and camshaft sensors and now the car wont start, it cranks good but will not turn over.
Any suggestions??
While driving 70mph on the highway my car started trying to die and back fire. I was able to limp it home but couldn't drive over 30mph without the car acting up. Check engine light came on and scanner said it couldn't read engine speed and that the crankshaft sensor could be the problem. I replaced the crankshaft and camshaft sensors and now the car wont start, it cranks good but will not turn over.
Any suggestions??
Thread Starter
Joined: Jun 2018
Posts: 3
From: Texas
Cats are good and the o2 sensors haven't been connected in about a year. Mil code says no signal from o2 sensor which has been there, and a new one saying it can't read engine speed/crankshaft/camshaft sensor.
3rd Gear Member
Joined: Aug 2015
Posts: 939
From: SE Michigan
Hold on, I think you need to pursue that not-turning-over issue first. If you can hear the starter spinning, but the engine won't even turn, you've got a totally separate problem, unrelated to your CKP/CMP sensors. Can you turn the engine over by hand?
Thread Starter
Joined: Jun 2018
Posts: 3
From: Texas
has code P0320
4th Gear Member
Joined: Nov 2009
Posts: 1,826
From: SoCal
Banned
Joined: Jan 2018
Posts: 2,327
From: Pennsylvania
P0320 code is triggered when the Engine Control Module (ECM)
detects that there is no current at the ignition coil group. Check for
a shorted wire or wires at the ignition coil, or loose plug. There was
an issue with the 2004 expeditions where a wire bundle in a loom was
rubbing on one of the A/C lined, and it eventually frayed the wiring
and shorted against the A/C line, this cutting power to the coil pack.
Other Possible causes:
Faulty Ignition/Distributor engine speed sensor
Faulty Crankshaft Position sensor
Ignition/Distributor engine speed sensor harness is open or shorted
Ignition/Distributor engine speed sensor circuit poor electrical connection
Low battery charge
Faulty Engine Control Module (ECM)
Check grounds, crank, cam sensors and wiring.
If there is any arcing at the coil pack between where the wires plug into the
coil pack, can cause this. If the plug wires are bad, and it gets very damp,
they can arc to one another, or internal coil pack shorting = bad coil pack.
If not the sensors, then replace the plugs, wires and coil pack.
95% of the time it's the crank sensor.
detects that there is no current at the ignition coil group. Check for
a shorted wire or wires at the ignition coil, or loose plug. There was
an issue with the 2004 expeditions where a wire bundle in a loom was
rubbing on one of the A/C lined, and it eventually frayed the wiring
and shorted against the A/C line, this cutting power to the coil pack.
Other Possible causes:
Faulty Ignition/Distributor engine speed sensor
Faulty Crankshaft Position sensor
Ignition/Distributor engine speed sensor harness is open or shorted
Ignition/Distributor engine speed sensor circuit poor electrical connection
Low battery charge
Faulty Engine Control Module (ECM)
Check grounds, crank, cam sensors and wiring.
If there is any arcing at the coil pack between where the wires plug into the
coil pack, can cause this. If the plug wires are bad, and it gets very damp,
they can arc to one another, or internal coil pack shorting = bad coil pack.
If not the sensors, then replace the plugs, wires and coil pack.
95% of the time it's the crank sensor.
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