Ford

Have Ford questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

7.3 powerstoke excursion won’t start, I think something is…

Customer Question
7.3 powerstoke excursion won’t...

7.3 powerstoke excursion won’t start, I think something is wrong with the anti theft system PATS

Mechanic's Assistant: Have you checked the battery, particularly the terminal connections? Are they corroded?

They are not corroded

Mechanic's Assistant: What year is your Excursion?

2003

Mechanic's Assistant: Are you fixing your Excursion yourself? What have you tried so far?

Yes, I’ve had this happen before, in the past I have disconnected the batteries for a while and then it started

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

Sometimes it will start then immediately die, the theft light is blinking slowly

Submitted: 4 months ago.Category: Ford
Show More
Show Less
Ask Your Own Ford Question
Answered in 18 minutes by:
3/17/2018
Ford Mechanic: Scott W., Ford Technician replied 4 months ago
Scott W.
Scott W., Ford Technician
Category: Ford
Satisfied Customers: 3,604
Experience: 28 yrs. experience as Ford ASE Master Technician. Accolades include being a 2005 Ford PTS Regional Finalist and 2006 ASE Ford National Technician.
Verified

H​ello my name is ***** ***** the starter try to engage? Is the theft light flashing rapidly like 3 flashes a second?

Ask Your Own Ford Question
Customer reply replied 4 months ago
It turns over, fairly new interstate batteries, it is not flashing rapidly. Blinks about every 3 seconds. If I disconnect the battery for about 30 min and reconnect it will fire up for about 2 seconds then die. It did this to me about a month ago, I disconnected battery overnight and it started the next day
Ford Mechanic: Scott W., Ford Technician replied 4 months ago

O​k that means the Pats is working correctly. Have you had it checked for codes? It could be a ICP sensor concern try unplugging the ICP sensor and see if it will start.

Ask Your Own Ford Question
Ford Mechanic: Scott W., Ford Technician replied 4 months ago

I​t is toward the front of the drivers cylinder head, see if there is oil in the connector also.

Ask Your Own Ford Question
Customer reply replied 4 months ago
I have an OBDII scan tool, the only code it has is P1670. EF feedback signal not detected. I will check the ICP sensor. Charging batteries now
Ford Mechanic: Scott W., Ford Technician replied 4 months ago

O​k, it could be a bad IDM, injector driver module or a wiring concern between the computer and IDM, I would take a look at the wiring where drapes over the drivers side valve cover, disconnect the large connector and flip the loom over and see if there any wires chafed on the bottom side.

Ask Your Own Ford Question
Customer reply replied 4 months ago
Ok, will do. I replaced the wiring harness under the valve cover a few months ago when I but in new glow plugs and rebuilt the injectors. Would this still allow it to start fine and then die after a few seconds?
Ford Mechanic: Scott W., Ford Technician replied 4 months ago

I​t could if the wire is intermittently grounding out, another cheap try is a cam sensor, we replace a bunch of these for stalling concerns also.

Ask Your Own Ford Question
Customer reply replied 4 months ago
Wouldn’t a faulty cam sensor throw a code?
Ford Mechanic: Scott W., Ford Technician replied 4 months ago

T​hey most of the time did, but on rare occasions I have seen some not set a code.

Ask Your Own Ford Question
Customer reply replied 4 months ago
I checked all the wiring, I don’t see any that we’re worn. I unplugged the ICP and it still won’t start. It was running fine, drove to town about 6 miles. Shut it off at the store and when I came out it fired right up, then died within 2 seconds, started again with same result about 3 more times, then it will turn over without starting, I disconnected the battery for about 30 min. Reconnected battery, started and died 3 more times, now only cranks and will not fire.
Customer reply replied 4 months ago
Is the theft light supposed to be blinking all the time? It blinks with the ignition off, when the wiring ignition is on, and my wife thinks she noticed it has been blinking when the truck was running.
Ford Mechanic: Scott W., Ford Technician replied 4 months ago

OK i am wondering if the injector driver module might be bad. The 1670code means there is no communication between the computer and IDM. Here is the pinpoint test for code 1670. Click here

Ask Your Own Ford Question
Ford Mechanic: Scott W., Ford Technician replied 4 months ago

It should blink key off.

Ask Your Own Ford Question
Customer reply replied 4 months ago
What about ignition on and while running?
Ford Mechanic: Scott W., Ford Technician replied 4 months ago

No, it should come on when starting then go out.

Ask Your Own Ford Question
Customer reply replied 4 months ago
Can the PATS system be the reason?does it prevent communication between the computer and the IDM?
Customer reply replied 4 months ago
I’ll have to get my multimeter to perform the diagnostic test, I guess I’ll have to get it towed back home to my shop
Ford Mechanic: Scott W., Ford Technician replied 4 months ago

The PATS system when active flashes rapidly to let you know that is the reason of the no start. Since your is not flashing rapidly it doesn't appear to be PATS related. It should be tested with a scan tool though to make sure. Here is a description of the system. You may need to get a scan tool that will check all modules to see if there are other codes stored. Some of the cheaper scan tools don't work with diesels either. Click here

Ask Your Own Ford Question
Customer reply replied 4 months ago
Can the IDM sporadically act up? Because I’ve had this happen before about a month ago, but it started the next day?
Ford Mechanic: Scott W., Ford Technician replied 4 months ago

It can, sometimes they leak and get water inside shorting out the module, have you had a lot of rain lately?

Ask Your Own Ford Question
Customer reply replied 4 months ago
It’s been pretty dry, but it did rain yesterday
Customer reply replied 4 months ago
This is the first I’ve driven it in about a week
Ford Mechanic: Scott W., Ford Technician replied 4 months ago

I​ would run that pinpoint test and see where it leads, try clearing the 1670 and see if it comes right back if it does that means the fault is still present and the pinpoint test hopefully will lead you to the problem.

Ask Your Own Ford Question
Customer reply replied 3 months ago
I spoke to a diesel mechanic at work and he said it probably isn’t the IDM. He said usually both banks will not go out at the same time. He said to try a cam sensor first, easy to change and only about $30. He said the power strokes were notorious about them going out, Ford even had a recall. If this doesn’t work I will then do the diagnostics with the IDM harness
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

G​ood deal, 2 of us say try the cam sensor first, let me know what happens.

Ask Your Own Ford Question
Customer reply replied 3 months ago
Replaced cam sensor, still not starting
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

Have you ran that pinpoint test out for the 1670 code? Is it still setting the 1670 code?

Ask Your Own Ford Question
Customer reply replied 3 months ago
Scott, I ran the diagnostic test for code 1670 up through test FJ7 and everything checked out ok. I could not run test FJ8 because my scan tool is not that advanced and it does not run. Does this mean my IDM is bad? I have cleared the code and it does not throw it again when I’m cranking the engine.
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

Have you pulled the fuel filter cap off and turned on the key to see if the fuel pump is supplying fuel? Or have you checked fuel pressure? I just find it odd it ran into town, started then died, and would start for a couple seconds after the battery was disconnected and reconnected. Another thing too is when cranking, listen for the injectors to start clicking, you may need someone to crank this over then you listen under the hood, they are pretty noisy clicking and clacking if there is no fuel pressure, this would also let us know if the IDM was sending pulse width to the injectors.

Ask Your Own Ford Question
Customer reply replied 3 months ago
I have fuel pressure, not sure what it is but I opened the fuel bowl drain and turned the key on, fuel was flowing out. I had someone crank the engine and I do not hear the injectors making any noise
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

I​ think you at a point where this vehicle needs to have a scan tool on it to monitor pids and do a injector test, these test will help narrow down the no start, I assume all the fuses have been checked first just to make sure there isn't one blown somewhere. But an injector test with a scan will check the functionality of the IDM along with all the communication of the modules. You can then monitor pids while cranking to see if all the pids are reading correctly or if there is one causing the no start. Guessing at a IDM can be expensive, so we want to make sure this is the part it needs, a few dollars of diag can be worth so much more, than buying a module for $$$ and not fixing the truck.

Ask Your Own Ford Question
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

We have a "test" IDM at work just for these instances.

Ask Your Own Ford Question
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

S​ometimes these modules won't let the vehicle start, and will pass every test also, not set any codes. But it should be tested first with a scan tool regardless.

Ask Your Own Ford Question
Customer reply replied 3 months ago
I can purchase a rebuilt IDM for about $120. It will cost at least $150 just to have it towed to a mechanic, I’m probably looking at close to $500 just to have it diagnosed. I’ll check to see if I can find someone who has one. What’s a good reasonable priced scanner that can do what I need?
Customer reply replied 3 months ago
http://www.riffraffdiesel.com/autoenginuity-total-ford-enhanced-bundle/
Would this do what I need?
Thanks
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

T​hat is a good price for a rebuilt IDM. As far as a scan tool I only have experience with a Ford IDS, and they are 3500 plus. The one you listed I am not sure, you would have to contact them and ask if it does koeo injector tests and all other running tests.

Ask Your Own Ford Question
Customer reply replied 3 months ago
A mechanic friend is going to let me borrow his scan tool, going to pick it up now.
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

Ok

Ask Your Own Ford Question
Customer reply replied 3 months ago
it looks as if my ICP sensor is only reading about 250psi when cranking, I unplugged it to make it go into default and it reads about 2300psi but still will not start. Looks like I need to replace it, but why won’t it start
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

I am assuming since the ICP is low, there isn't enough pressure to push the fuel in, there also needs to be 500 psi minimum before the injectors will even fire. I wouldn't replace the ICP yet as long as it reads 0 psi or close too with the key on not cranking then it should be ok.

Ask Your Own Ford Question
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

L​ow ICP can be cause by injector Oring blown out, it could be a IPR valve, it could also have a oil pump problem letting the oil system bleed down and causing a no start. First I would remove the plug on top of the high pressure reservoir, see if oil starts filling this up while cranking the engine over. See if it is full, if will not be completely full since there is a stand pipe in there, and only fills to about an inch or so from the top.

Ask Your Own Ford Question
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

It could also be a fuel injector leaking all the high pressure oil out, to test this we remove the valve covers and inspect the injector spill spouts and the one with all the oil out has a bad injector. It will be running out while cranking the engine over.

Ask Your Own Ford Question
Customer reply replied 3 months ago
Got it figured out, the retaining nut came off the back of the IPR valve allowing the solenoid head to slide back on the shaft. I slid it back forward and it started right up, this is why it was an intermittent problem. I’ll get a new nut and secure it
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

Awesome, you found the problem. Thanks for the reply!

Ask Your Own Ford Question
Ford Mechanic: Scott W., Ford Technician replied 3 months ago

If you have more questions just ask, all I ask, is you take the time to rate my service today, as this is how I am paid for my time, thanks Scott. You can always ask follow up questions after rating.

Ask Your Own Ford Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a ford mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Scott W. Your Own Question
Scott W.
Scott W.
Scott W., Ford Technician
Category: Ford
Satisfied Customers: 3,604
3,604 Satisfied Customers
Experience: 28 yrs. experience as Ford ASE Master Technician. Accolades include being a 2005 Ford PTS Regional Finalist and 2006 ASE Ford National Technician.

Scott W. is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on.

Rich DUSA

Because of your expertise, you armed me with enough ammunition to win the battle with the dealer. They are installing a fuel filter and fuel pump at no charge to me.

MollyUSA

I needed help with my car on Saturday morning....got a response in 5 minutes, and it was the perfect solution. Thanks again to your service.

Jason V.Kirkland, WA

I do know, after going though this with JustAnswer, that I can somewhat trust my mechanic but I will always contact you prior to going there.

BRNew Jersey

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

< Previous | Next >

Meet the Experts:

Ron

Ron

ASE Certified Technician

25,022 satisfied customers

23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs

Chris (aka- Moose)

Chris (aka- Moose)

Technician

28,993 satisfied customers

16 years experience

John Mc

John Mc

Ford Technician

5,495 satisfied customers

19 years Ford Lincoln Mercury experience

Chuck

Chuck

ASE Certified Technician

1,685 satisfied customers

33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance

Cam

Cam

Journeyman Automotive Technician

10 satisfied customers

GM Grand Master Technician 2007. 14 years Automotive experience.

Mike V.

Mike V.

Auto Service Technician

1,556 satisfied customers

25 years experience on all makes and models, Licensed NYS Inspector.

Richard

Richard

ASE Certified Technician

1,524 satisfied customers

12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.

< Previous | Next >

Related Ford Questions
I have a 2000 Ford Excursion with the PATS system. It will
Hello, I have a 2000 Ford Excursion with the PATS system. It will not start. Replaced the starter solenoid and still nothing. Checked starter and it is working. Battery is fine. The only way to start … read more
James
James
Bachelors degree automotive technology with minor in diesel
3,578 satisfied customers
I have a 2003 F150 XLT. Recently it has started having a
I have a 2003 F150 XLT. Recently it has started having a strange issue. Sometimes the truck will turn over but not start. When this happens, the odometer numbers are replaced by hyphens and the "theft… read more
XtraTech
XtraTech
Sr. Technician
Bachelor's Degree
149 satisfied customers
Expedition: I cant get my 2007 Ford Expedition to start with
I can't get my 2007 Ford Expedition to start with either of my keys. I just bought it today and was attempting to program the HomeLink Wireless System referencing the Owner's Guide. I made the mistake… read more
James
James
Bachelors degree automotive technology with minor in diesel
3,578 satisfied customers
Ford Escape: Hi, Ive had a similiar problem to: Customer
Hi, I've had a similiar problem to: XXXXX my vehicle won't start, it appears the anti-theft system is activated. what can I do, NO I do not have a spare key, it is 4 hours away !!! You're response was… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,022 satisfied customers
2001 ford excursion v-10 gas: 2001 ford excursion turns over
2001 ford excursion turns over wont start, 1/3 tank gas. I think it has something to do w/alarm system interior lights were on two nights ago & had rapid blinking had to jump start. Is there an easy f… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
have a 2003 Ford Taurus, didnt have a problem with it starting
have a 2003 Ford Taurus, didn't have a problem with it starting until I had a remote starter installed on it, it worked fine for the first week, this morning the car wouldn't start (lights worked, hea… read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
Excursion diesel: 2002 Ford Excursion diesel ran fine yesterday.
2002 Ford Excursion diesel ran fine yesterday. Today will not start. Disconnected both batteries and reconnected still will not start. glow plug does not go out… read more
Scott W.
Scott W.
Ford Technician
3,604 satisfied customers
expedition EL: i have a 2007 expedition that will not start
i have a 2007 expedition that will not start plenty of battery power just absolutely nothing when i turn the key, Was told that the blinking lit up anti theft indicator has something to contibute to t… read more
Autotech58
Autotech58
Auto Repair Technician
Vocational, Technical or Trade Scho
268 satisfied customers
Excursion: Hi John- I have a 2001 7.3 liter Excursion. Have
Hi John- I have a 2001 7.3 liter Excursion. Have had difficulty starting it and having it shut off while driving down the road. Looked at it this weekend and found a problem in the power fuse box. The… read more
John Crouch
John Crouch
lead senior master tech
Vocational, Technical or Trade Scho
1,383 satisfied customers
I unhooked the batteries on my 7.3 2000 Excursion to do some
I unhooked the batteries on my 7.3 2000 Excursion to do some work on it and now when I reconnect the batteries the alarm starts going off. How do I fix this? Alarm is on instantly as soon as the batte… read more
Jeremy
Jeremy
Technician
Vocational, Technical or Trade Scho
104 satisfied customers
2002 ford excursion 7.3 No start theft light on. Install motor
2002 ford excursion 7.3 No start theft light on. Install motor and transmission, PCM and IDM from 2000 excursion. Also front doors had been removed and the wiring cut at door post. Install doors and a… read more
6Bucs
6Bucs
Senior Master Tech
Associate Degree
3 satisfied customers
RE 2001 Ford Excursion Diesel Anti Theft blinking. Wont
RE: 2001 Ford Excursion Diesel Anti Theft blinking. Won't start. What do I do to get it started?… read more
Mazda Ed
Mazda Ed
Lead Technician
High School or GED
1,963 satisfied customers
I have a 2003 ford taurus. The anti theft light comes on and
I have a 2003 ford taurus. The anti theft light comes on and I can't start the car. I've disconnected and reconnected the battery, locked and unlocked the doors, still doesn't start. The battery is ne… read more
lostrider
lostrider
lead technician/working shop foreman
Vocational, Technical or Trade Scho
2,958 satisfied customers
2002 Excursion: a piggyback chip on PCM and THEFT light flashes
2002 Excursion 7.3. Installed a piggyback chip on PCM and THEFT light flashes rapidly and vehicle will not start. Connections are clean. Any advice?… read more
Dieseljunky2
Dieseljunky2
Locomotive Mechanic
Ford Certified Technician
310 satisfied customers
2002 Excursion: programmed..2001 Model..lower tune..I tried starting
I recently programmed my 2002 Excursion 7.3 with a SuperChip 2001 Model 1700. Worked great. Tried reprogramming to a lower tune and my "THEFT" light was fast blinking when I tried starting. I know tha… read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
8,789 satisfied customers
2001 excursion: ford diesel..that is in theft mode (pats - all..keys
I have a ford diesel 2001 excursion that is in theft mode (pats - all from Ford). How do I reset? I have three keys (delearship suggestion), if that helps.… read more
John Mc
John Mc
Ford Technician
Vocational Trade School
5,495 satisfied customers
99 3.8: Mass Airflow Sensor..L..windstar..the theft light blinks
I replaced the Mass Airflow Sensor on my 99 3.8 L windstar. Now the theft light blinks once, pauses, then blinks six times. It doen't appear to be giving me any gas. I tried disconnecting the battery … read more
FMT2282
FMT2282
Shop Forman
Associate Degree
209 satisfied customers
Our 2000 Lincoln Navigator wont turn over sometimes. I have ...
Our 2000 Lincoln Navigator wont turn over sometimes. I have heard it could be the theft system. Could it be that or the starter? It doesnt make any noise and the radio and dash lights go out when this… read more
RIP
RIP
Lead Technician/ JA Car Category Mentor
High School or GED
452 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x