• Welcome Visitor! Please take a few seconds and Register for our forum. Even if you don't want to post, you can still 'Like' and react to posts.

Sudden Stall, Now No Crank, Flashing PATS, No Odometer!


Broosedamoose

Active Member
Joined
Mar 10, 2012
Messages
362
Reaction score
115
Points
43
Location
South East Massachusettes
Vehicle Year
2007
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0L SOHC
Transmission
Automatic
2WD / 4WD
4WD
Tire Size
31 x 10.5
My credo
Coming in second just makes you the first loser!
So I've spent an hour or so looking thru the search finds but nothing like this! I was driving my truck (07 XLT 4.0, 4WD) and the engine quits. I throw it in neutral and try to start but get nothing. So I pull over and put it in park. Turn the key and it starts right up. Drive about 2-300 yards and it quits again. I pulled over and try to start it but nothing this time. I wondered if it may be the alternator went bad with me knowing and driving on the battery killed it. However, headlights were plenty bright. I get in and turn the key and it starts right up! Now I'm scratching my head. Take off, get on the freeway and drove about 2 miles and it quits again. Now, when turn the key I get no crank, the theft light flashes rapidly and the odometer displays only dashes. Got towed home and put the scanner on it but it can't communicate with the PCM so no codes. I've tried my other keys, checked all related fuses/relays, verified voltage at the PCM (11.9 volts), and checked PCM grounds! Before I give the PCM it's last rights is there anything else you think I should check that may be the issue? I did replace the Thermostat Housing (AGAIN) last week but I hardly think that has anything to do with it.
 


adsm08

Senior Master Grease Monkey
Supporting Member
Article Contributor
Ford Technician
TRS 20th Anniversary
Joined
Sep 20, 2009
Messages
34,623
Reaction score
3,613
Points
113
Location
Dillsburg PA
Vehicle Year
1987
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0
Transmission
Manual
2WD / 4WD
4WD
Tire Size
31X10.50X15
If you can manually start a session with your scanner do that and see if you can talk to the other modules. That would verify the data lines.

Test resistance between pins 2 and 10 at the DLC. If the narrow side is "down" they are the second pins in from the left, top and bottom. Should read 60ish ohms. 60 is good, 120 is bad, zero is bad.

You can also unplug the PCM and resistance test the lines between the DLC and the computer itself. This would only be needed if you have an incorrect reading between 2 and 10.
 

Broosedamoose

Active Member
Joined
Mar 10, 2012
Messages
362
Reaction score
115
Points
43
Location
South East Massachusettes
Vehicle Year
2007
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0L SOHC
Transmission
Automatic
2WD / 4WD
4WD
Tire Size
31 x 10.5
My credo
Coming in second just makes you the first loser!
I just came in from doing that exact thing; checking the data lines! LOL! Too funny. I will go back out and check those pins tho! I'll let you know what I find.
 

Broosedamoose

Active Member
Joined
Mar 10, 2012
Messages
362
Reaction score
115
Points
43
Location
South East Massachusettes
Vehicle Year
2007
Make / Model
Ford
Engine Type
4.0 V6
Engine Size
4.0L SOHC
Transmission
Automatic
2WD / 4WD
4WD
Tire Size
31 x 10.5
My credo
Coming in second just makes you the first loser!
So here is what I got:


I was also told to check for a voltage of 5.0 at the TPS (Grn/Vlt wire) because if it goes bad and is shorting out will cause the same symptoms. Unfortunately I couldn't be so lucky! Perfect 5.0 VDC present. :annoyed:

So it's gotta be the PCM! My concern now is "what caused it to go bad"! I'd hate to buy another PCM only to put it in and get fried because of an external issue!:dunno:
 

rusty ol ranger

Im a Jeep guy now.
Supporting Member
Joined
Sep 22, 2007
Messages
12,354
Reaction score
7,431
Points
113
Location
Michigan
Vehicle Year
1987
Make / Model
Ford
Engine Type
2.9 V6
Engine Size
177 CID
Transmission
Manual
2WD / 4WD
2WD
My credo
A legend to the old man, a hero to the child...
They can just go bad...
 

Sponsored Ad


Sponsored Ad

Members online

Today's birthdays

Member & Vendor Upgrades

For a small yearly donation, you can support this forum and receive a 'Supporting Member' banner, or become a 'Supporting Vendor' and promote your products here. Click the banner to find out how.

Truck of The Month


Shran
April Truck of The Month

Recently Featured

Want to see your truck here? Share your photos and details in the forum.

Follow TRS On Instagram

TRS Events

25th Anniversary Sponsors

Check Out The TRS Store


Sponsored Ad


Sponsored Ad

Sponsored Ad


Amazon Deals

Top