Ford

Have Ford questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

2000 ford 7.3L powerstroke diesel. Runs but not well. It…

Customer Question
2000 ford 7.3L powerstroke diesel...
2000 ford 7.3L powerstroke diesel. Runs but not well. It feels like it is in "limp mode" although I don't think this model has a true "limp mode"..as far as I can tell.I can accelerate but the truck has no power, it will barely move if there is any grade/slope at all. it will shift through 1/2/3 gears in drive (automatic) and get up to about 35mph max on level roads. In neutral the rpms will slowly raise all the way if I put my foot on the pedal, but in gear the rpms won't seem to raise above 2000-2500 or so. There is white smoke though not a significant amount.No check engine light and no (current) error codes with bluetooth obd scan tool.Looking for expert who is familiar with these older 7.3L engines, and troubleshooting electrical/sensor issues etc.I suspect possible injector issue or wiring harness issue, but want help ruling out other issues (sensors, blown headgasket, low compression, turbo/boost issues before pulling apart the valve covers. I haven't owned truck long. The previous owner recently replaced all injectors although I do not know about the wiring harnesses, or the quality of the injectors he used.So far I have:
-replaced fuel filters, bled lines, ran truck for awhile
-checked fuel pressure at both ports pre/post fuel filter = good fuel pressure.
-checked oil pressure with manual gauge = ok
-checked hpop (high pressure oil pump) oil reservoir = level good, no junk or clumps
-replaced ICP sensor with a good quality oem part. Replaced/spliced new connector.
-checked & cleared codes. Previously the only code showing up (intermittently/occasionally was p1280). Have not seen it since ICP sensor replaced. Icp sensor had some minor amount of possible oil leakage on through the wiring connector.
-performed injector buzz test with cargauge pro app (bluetooth code reader) and all injectors buzzed normally and evenly.
-inspected intake/turbo piping for leaks
-cleaned top of engine to check for oil leaks, etc.Please advise on specific troubleshooting steps to follow next.I want to check the sensors like the crank position sensor, etc, or any other related sensors that could cause something like this. I want to check the fuel delivery side of the injectors. I want to test electrical connections and harnesses, especially the ones on top of and under the valve cover. I want to confirm that the turbo / boost system is functioning correctlyI do not believe I have access to a way to do a cylinder contribution test, but I have a volt/ohm meter, and most normal mechanic tools. I don't have a manual but could order one. I have lots of experience working on older diesel vehicles but stumped with this one.Thank you very much for any specific steps or assistance.
Submitted: 4 months ago.Category: Ford
Show More
Show Less
Ask Your Own Ford Question
Answered in 5 hours by:
12/4/2017
Ford Mechanic: Chris (aka- Moose), Technician replied 4 months ago
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 51,099
Experience: 16 years experience
Verified

Welcome, I'm Chris (aka-Moose).

  • WORK TIME, I am here 7 days a week but not all hours of the day, do not worry I will respond.
  • FEES, I am a user of the website like you, not an employee. Any fee or account questions need to be addressed to the website.
  • PHONE CALLS, I will never offer nor ask you to pay more for a call, calls and memberships are pushed by the website.
  • UPLOADED LINKS, if I upload dropbox links, without the phone app use the box on the top right for direct download.
  • RATING ANSWERS, please let me know what you need from me so you are pleased with my answer.

Does it start and idle fine?

What is the ICP pressure and IRP % at wide open throttle WOT?

Any concerns with boost pressure?

Ask Your Own Ford Question
Customer reply replied 4 months ago
It takes a little extra cranking to start, maybe 10 seconds. And a little slow to "catch" while cranking, have to keep holding the key in start position for an extra half second to 1 second to keep it running, or it might die.Once running though it seems to idle pretty well, maybe not perfect but not easy to describe. Just a little rough, possibly.I last checked ICP pressure, around 500 at idle and 2400-2800 at wot, but the wot value would fluctuate a lot. I will test again and post back as that was before the new icp. I have not checked ipr %, going to read up on that now and will post results asap.I don't have a manual boost a gauge, and no reliable previous info (truck came to me not running). I am using the torque pro app and car gauge pro app, will try to get a vacuum / boos reading, and intake manifold pressure reading from one of those apps. Will post that.But if you are able to describe in slightly more detail what I might be looking for regarding boost issue/s, and etc, I would greatly appreciate it.Thank you for your help
Customer reply replied 4 months ago
Some data, more details at end as there was a significant change in behavior, more white smoke, both at idle & wot, and new intake area oil leak (looks like between ccv and valve cover) after running it hard for about 15-20 minutes to get these values at wot w/engine warm. Engine does have some blowby when oil cap off but not enough to push the oil cap off when set on looselyFuel pump duty cycle 101%
Injector pressure 608 psi idle 1800-2200 psi average, upto 2400max at wot, one time also reading in the 3200 range wot (this was right after truck first started up). fluctuating a lot above idle.Inj pressure duty 30% idle 30-50% wotInj presdure volts .85 idle 1.8-2 wotManifold absolute pressure 14.7 psi idle 16.8-18psi wotTurbo wastegate 25-35% idle 80- 99% wotDid a cyl contribution test which showed p0266 cyl 2 error code (engine warm) but the app didn't provide more data.After the behavior change was noticed (after a few wot runs in park) now it is a lot harder to start (upto 20 seconds cranking) and low idle rpms, sometimes dies/ stumbles at idle after foot is taken off accelerator pedal. Also more white smoke than before, andidle speed closer to 500rpm previously was around 800-900.Thanks again
Customer reply replied 4 months ago
How can I check the headgasket? (as a "shade tree"/backyard mechanic)
Customer reply replied 4 months ago
Also p1211 at some point?How would i go sbout testing the regulator under the fuel filter area and the wiring connector/ harness going to it?
Ford Mechanic: Chris (aka- Moose), Technician replied 4 months ago

The head gaskets can be checked through a scan tool running a relative compression test or by using a manual gauge through the glow plug holes.

The numbers you posted look to be within order except for the part where you said things were going up and down. On the long crank is the ICP struggling to get to the minimum 500 psi? Is the valley oil leak at the HPOP, if so there are updated plugs for it. Here are the steps for the ICP controllability code https://www.dropbox.com/s/oruovynx0q44c09/ke15.pdf?dl=0

I believe the focus is on the IPR, HPOP, or the injectors and O-rings in this case.

Now that I have posted a partial or complete answer, you will see you can rate me. The deposit you have already paid is not transferred to me until you rate me. I would like to receive nothing less than 5-star excellent ratings. So if we are not there yet, please reply and let me help more. If you're not pleased, let me know because rating bad does not result in a refund, there are better options. Rating now will not close this post nor prevent replying. Thanks Chris

Ask Your Own Ford Question
Customer reply replied 4 months ago
I have gone through the steps you posted (not conclusive).I would like to know how to test the ipr directly?I have run a warm "relative compression test" (cyl contribution test) which showed cyl 7 error code. I would like to know if there is any way to narrow down injector issue VS compression/head gasket/worn rings?i do have diesel compression tester but on past vehicle was unable to fit it to the rear cylinders (cyl 7, rear pass side is the one showing posdible issues). So id like to do everything else before pulling valve cover/s.THANK YOU FOR ALL YOUR HELP. WILL RATE SOON POSITIVE FEEDBACK AS I BELIEVE WE ARE CLOSE. BUT NEED HELP WALKING THROUGH THE LAST COUPLE OF STEPS WOTHOUT DOING UNNECESSARY WORK OR BLINDLY SWAPPING PARTS.
Customer reply replied 4 months ago
no hpop oil leak, i degreased / pressure washed the engine and used clean rags to determine minor oil leak is either between ccv & valve cover or possibly somewhere else in the turbo/pedistal/ intake area.
Ford Mechanic: Chris (aka- Moose), Technician replied 4 months ago

If you got low compression on a cylinder the only external test you can do is remove the injector to check the copper washer at its base. If that is fine then you have to remove the head to see why the compression is low.

Here are some more tests.

https://www.dropbox.com/s/ado9toczka4ddd0/performanceissues.pdf?dl=0

https://www.dropbox.com/s/746bcqoutof4aiw/IPRtest.pdf?dl=0

Ask Your Own Ford Question
Ford Mechanic: Chris (aka- Moose), Technician replied 4 months ago

Hello, Chris here again,

I am checking in to make sure you got everything you expected from my answer. The option to rate my response or reply is still available. I want to make sure you were pleased with what you paid for.

Thanks Chris

Ask Your Own Ford Question
Customer reply replied 4 months ago
can you tell how ti test the ipr physically & electrically? the dropbox link you posted doesn't help
Ford Mechanic: Chris (aka- Moose), Technician replied 4 months ago

You can remove it and apply power and ground and watch it move.

Ask Your Own Ford Question
Was this answer helpful?
Ask Chris (aka- Moose) Your Own Question
Chris (aka- Moose)
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 51,099
51,099 Satisfied Customers
Experience: 16 years experience

Chris (aka- Moose) 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

24,610 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

51,099 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.

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.

Mike V.

Mike V.

Auto Service Technician

1,455 satisfied customers

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

< Previous | Next >

Related Ford Questions
How do I test the high pressure oil pump on my 6.
how do I test the high pressure oil pump on my 6.0 powerstrke… read more
connor75
connor75
Technician
Vocational, Technical or Trade Scho
356 satisfied customers
1999 ford f250: 5.4l..im trying to pull oil pan to change oil
i have a 1999 ford f250 5.4l and im trying to pull oil pan to change oil pump... But pan does not seem 2 want to come out do i need 2 pull motor in order to remove pan?… read more
lostrider
lostrider
lead technician/working shop foreman
Vocational, Technical or Trade Scho
2,958 satisfied customers
Where is ICP Sensor located? 2006 Ford F250 SD 6.0
Where is ICP Sensor located? 2006 Ford F250 SD 6.0… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
On a 2006 Ford Freestar with 4.2 engine, the engine oil pump
On a 2006 Ford Freestar with 4.2 engine, the engine oil pump mounting gasket was bad. I wiggled a bit and managed to slip the pump/filter housing off. Now I can't seem to get it to slip on again. It's… read more
Steve W
Steve W
Line Technician
Vocational, Technical or Trade Scho
1,968 satisfied customers
I replaced the High Pressure Oil Pump in my 1997 E-350, 7.3
I replaced the High Pressure Oil Pump in my 1997 E-350, 7.3 diesel. The old pump had a censor plugged to it. The new pump has no censor to connect to. Now the truck will not start. Is the failure to s… read more
Jeremy
Jeremy
Technician
Vocational, Technical or Trade Scho
104 satisfied customers
98 mustang 3.8 no oil pressure put new oil pump and cam
98 mustang 3.8 no oil pressure put new oil pump and cam shafts synchronizer … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
7.3 powerstroke no low oil pressure brand new oil pump. 99 f
7.3 powerstroke no low oil pressure brand new oil pump … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
51,099 satisfied customers
Changed high pressure oil pump o ring on 99 f350 now will
Changed high pressure oil pump o ring on 99 f350 now will not fire no smoke or anything … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
51,099 satisfied customers
No oil pressure. Oil pump do not know how old.bought the
oil pump do not know how old.bought the truck used and the oil light is on … read more
Michael
Michael
Automotive Technician
High School or GED
257 satisfied customers
Is there a defect with the oil pump on the ford ranger 4x4
is there a defect with the oil pump on the ford ranger 4x4 2014 model … read more
6Bucs
6Bucs
Senior Master Tech
Associate Degree
3 satisfied customers
Changed high pressure oil pump and engine does not crank.
changed high pressure oil pump and engine does not crank. Batteries and starter are good, but will not turn over. 2006 F250 6.0… read more
Jeremy
Jeremy
Technician
Vocational, Technical or Trade Scho
104 satisfied customers
I have a 2006 Excape 2.4 ltr. Just replaced the oil pump
I have a 2006 Excape 2.4 ltr. Just replaced the oil pump cooler. It was all good for the week, no leaks, no problems until last night while on the highway it lost all its oil. A quick look at it and s… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,038 satisfied customers
Changing distributor 77 400 ford oil pump drive shaft pulled
changing distributor 77 400 ford oil pump drive shaft pulled out of oil pump … read more
Jaybird61
Jaybird61
Master Automotive Mechanic
2,280 satisfied customers
What size are the bolts that are used to bolt the oil pump
What size are the bolts that are used to bolt the oil pump to the block on a 2,3 liter engine … read more
Jaybird61
Jaybird61
Master Automotive Mechanic
2,280 satisfied customers
Needing to locate the oil sending unit and oil pump on 1989
needing to locate the oil sending unit and oil pump on 1989 Ford F250 7.3 diesel engine 4x … read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
High pressure oil pump got weak so changed it out and now
High pressure oil pump got weak so changed it out and now will prime back up … read more
6Bucs
6Bucs
Senior Master Tech
Associate Degree
3 satisfied customers
After completing a phaser, timing chain, oil pump job on my
After completing a phaser, timing chain, oil pump job on my 2006 NAV and reassembling, the SUV ran beautifully for about 10 minutes then a loud screech started. I opened it back up and everything look… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
51,099 satisfied customers
Oil pump changed, spark plugs, vct's, phasers, chains,
Oil pump changed, spark plugs, vct's, phasers, chains, guides, coils, cps, and it runs rough all the time, no vacuum leaks, stalls, and is un-drivable. ECM is making beeping noises. Replaced engine wi… read more
davehop
davehop
Diagnostic Technician
Ford Master Certified Technician
1,171 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