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 > Ford V10 starting and dyeing

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eHoefler

ozark mountains

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Posted: 02/26/23 05:49am Link  |  Quote  |  Print  |  Notify Moderator

If stored with anything but a full tank, most likely water in the fuel and bad gas from not being stabilized


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Team D

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Posted: 02/26/23 06:55am Link  |  Quote  |  Print  |  Notify Moderator

I considered fuel pump / fuel filter / fuel relay, but none of those would explain why the starter does not continue to turn over until the engine starts. Use to be that I clicked the key over, let go and the starter would continue to crank until it started. Now, the moment I take my hand off the key, it stops turning over.

How does those switches work anyway? Seems to me like an electrical problem related to that switch.

enblethen

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Posted: 02/26/23 07:35am Link  |  Quote  |  Print  |  Notify Moderator

There is two relays under the hood. One relay is the starter relay the other is ignition. If the ignition relay fails there is no start and no power to dash. The e wiring to the dash is protected by a fuse link attached to the ignition relay. Check for loose connections.


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Chum lee

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Posted: 02/26/23 08:45am Link  |  Quote  |  Print  |  Notify Moderator

Team D wrote:

I considered fuel pump / fuel filter / fuel relay, but none of those would explain why the starter does not continue to turn over until the engine starts. Use to be that I clicked the key over, let go and the starter would continue to crank until it started. Now, the moment I take my hand off the key, it stops turning over.

How does those switches work anyway? Seems to me like an electrical problem related to that switch.


Your ignition switch/starting system is different than any starting system I've ever seen. (and no, I haven't seen them all!) For manual starting systems (no key fob or auto start) the engine should only crank when the key is turned to the start position and then stop cranking when the key is released (to the "on" position) whether the engine starts or not.

If you can confirm that there are no fault codes stored, I would begin by checking for vacuum leaks under the hood in the engine bay, all the while suspecting that it could be the fuel pump or fuel pressure related. (which may require the removal of the fuel tank)

How many miles on this vehicle?

Chum lee

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Posted: 02/26/23 11:58am Link  |  Quote  |  Print  |  Notify Moderator

The vehicle is supposed to stop cranking when you release the key. If yours did not stop then the lock cylinder is sticky and should be removed cleaned and lubed, or replaced.

This has noting to do with your not starting issue. But the still cranking when you let go of the key is a defect.


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j3ff9ack

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Posted: 02/26/23 05:35pm Link  |  Quote  |  Print  |  Notify Moderator

You might have an ECM or PCM issue. From another forum:

Powertrain Control Module (PCM) or Engine Control Module (ECM) controls the starter relay based on input from the key switch. When the ignition switch is held in the start position for 0.4 seconds, the PCM/ECM start timer is activated. Once the start timer is activated, the PCM/ECM will continue to crank the starter until either the engine starts or a no start time limit is reached.

The other symptoms sound like fuel supply, but if the ECM or PCM is not functioning properly, it could be causing those symptoms also.


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Team D

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Posted: 02/26/23 08:03pm Link  |  Quote  |  Print  |  Notify Moderator

That sounds expensive. Ouch

Good info though

Chum lee

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Posted: 02/27/23 08:11am Link  |  Quote  |  Print  |  Notify Moderator

j3ff9ack wrote:

You might have an ECM or PCM issue. From another forum:

Powertrain Control Module (PCM) or Engine Control Module (ECM) controls the starter relay based on input from the key switch. When the ignition switch is held in the start position for 0.4 seconds, the PCM/ECM start timer is activated. Once the start timer is activated, the PCM/ECM will continue to crank the starter until either the engine starts or a no start time limit is reached.

The other symptoms sound like fuel supply, but if the ECM or PCM is not functioning properly, it could be causing those symptoms also.


In most modern applications (OBD II), the ECM and the PCM have the ability to diagnose themselves in addition to the many functions they monitor/control. Customer states no "check engine" light.

Chum lee

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