Fuel Pressure Regulator?

[AmsterDutch]

Well just a few mins ago it took 8 secs and failed, it took 4 tries to crank. And was a miserable start when it finally did.

Are all the air ducts nice and tight? When it finally fires off is it still struggling to keep a steady idle rhythm? Is it hesitating on the initial fire? When was the last tune up? Have you checked your spark plugs and what do they look like right now? Have you tested your catalyst converter to make sure they’re not failing? Did you unplug your O2 Sensor and see if it makes a difference?

 

[DaleGrib]

Are all the air ducts nice and tight? When it finally fires off is it still struggling to keep a steady idle rhythm? Is it hesitating on the initial fire? When was the last tune up? Have you checked your spark plugs and what do they look like right now? Have you tested your catalyst converter to make sure they’re not failing? Did you unplug your O2 Sensor and see if it makes a difference?

Everything is nice and tight, When it first off finally it runs fine no struggle at all. It does not always hesitate on the first fire sometimes it starts right up. Last tune up was 400 miles ago. How can I test the catalyst? I have not unplugged the 02 sensor yet but I will do that in the morning.

 

[AmsterDutch]

Everything is nice and tight, When it first off finally it runs fine no struggle at all. It does not always hesitate on the first fire sometimes it starts right up. Last tune up was 400 miles ago. How can I test the catalyst? I have not unplugged the 02 sensor yet but I will do that in the morning.

Yep make sure you unplug that in the morning and see if it makes any difference...you can use a temp gun and check the Catalyst converter...YouTube has a wide range of DIY checks to see if the Cat is malfunctioning the easiest is to unplug the O2 Sensor but if there isn’t any problems while driving under heavy load then it’s possible the O2 sensor is going bad it will more than likely be your upstream sensor ...(the O2 Sensor before the cat) It’s strange that these symptoms are so intermittent

 

[AmsterDutch]

Everything is nice and tight, When it first off finally it runs fine no struggle at all. It does not always hesitate on the first fire sometimes it starts right up. Last tune up was 400 miles ago. How can I test the catalyst? I have not unplugged the 02 sensor yet but I will do that in the morning.

If I were you I would disconnect the battery over night and then reconnect it in the morning make sure all KAM is cleared ...then drive the car normal for about 10-15 minutes and let the transmission reset itself ...it sounds like your experiencing the same issues I had after changing out my fuel pump..the other things not to be ruled out still are as followed—-1. IAC 2. The Fuel Pump Assembly Module ( not just the fuel pump) , even though you could’ve gotten a bad pump also (but very unlikely) 3. O2 Sensor 4. Plugged Cat 5. Fuel Pressure Sonsor
6. Exhaust leak or air leak

 

[DaleGrib]

If I were you I would disconnect the battery over night and then reconnect it in the morning make sure all KAM is cleared ...then drive the car normal for about 10-15 minutes and let the transmission reset itself ...it sounds like your experiencing the same issues I had after changing out my fuel pump..the other things not to be ruled out still are as followed—-1. IAC 2. The Fuel Pump Assembly Module ( not just the fuel pump) , even though you could’ve gotten a bad pump also (but very unlikely) 3. O2 Sensor 4. Plugged Cat 5. Fuel Pressure Sonsor
6. Exhaust leak or air leak

I did not want to reset the computer I want the codes to stay there till they are sorted. It took over 300 miles for the computer to show the p0420 codes so I would not want to delete that data yet. I had taken it to one shop and they could not see what they needed at the time because they said all systems had not passed or failed. I was gonna take it to the one muffler shop in town that I trust they have a pretty good track record for not ripping people off.

 

[AmsterDutch]

I did not want to reset the computer I want the codes to stay there till they are sorted. It took over 300 miles for the computer to show the p0420 codes so I would not want to delete that data yet. I had taken it to one shop and they could not see what they needed at the time because they said all systems had not passed or failed. I was gonna take it to the one muffler shop in town that I trust they have a pretty good track record for not ripping people off.

I agree it’s good to keep those codes if you’re bringing it into a specific shop such as a muffler/exhaust specialist ...didn’t know you were going that route here is some info your code
Lincoln LS P0420 OBDII Code Defined
P0420 is a OBDII trouble code. The code technically stands for:

Catalyst System Efficiency Below Threshold

Your LS has at least two oxygen sensors, one before and after the catalytic converter. Among the many jobs that oxygen sensors have is they have to measure the emissions levels coming in and out of the converter.

When the readings from the upstream and downstream oxygen sensors show similar readings, the vehicle will throw the service engine soon light (P0420).

These readings shouldn’t match, since the catalytic converter is supposed to be scrubbing the exhaust. When the numbers match, the software in your LS believes that the catalytic converter is no longer doing its job.



Lincoln LS P0420 Code Symptoms

The P0420 code in a Lincoln LS will often be thrown one of your oxygen sensors are not functioning properly. Typically, the code will be triggered by the upstream oxygen sensor (before the converter).

There aren’t usually any drivability issues associated with P0420. For most people the first sign that anything is wrong at all is the service engine soon light coming on.

Here are the typical symptoms that something is wrong when you have code P0420.

• Fuel Efficiency- May or may not suffer depending on how much the catalytic converter is clogged.
• Loss of Power– It is a really strange feeling to drive a vehicle with a catalytic converter that is going out. Typically, they’ll idle ok and drive normal under a light load. Whenever the engine is put under a heavy load it’ll feel like it is running out of gas. It’s very similar to the symptoms of a bad fuel filter.
• Service Engine Light– Often, this is the only symptom of the Lincoln LS P0420 code

 

[DaleGrib]

I dunno if this helps or not but when I filled up tonight with 93 Octane Ethanol free gas I could smell gas inside the car after for at least 20 minutes. Also the P-0420 code did not happen till after I filled up with gas. Also can a bad fuel pressure sensor cause the p0420 code? Also here is a few videos of examples of my crank that I uploaded that I had on my phone.

 

[AmsterDutch]

“Now, connect the scan tool, start the engine and let it run until the tool shows that it’s in CLOSED LOOP. That means it’s no longer running off factory programming and is taking information from all the sensors and making its own calculations. Then, have a friend drive the vehicle while you monitor FUEL TRIM readings. Depending on your vehicle, you may be able to monitor both short and long-term fuel trim. Fuel trim is the amount of EXTRA fuel the PCM has to add to keep the engine running properly. In an ideal world with a brand new engine, the short term fuel trim should be 0. But in an older vehicle, a short-term fuel trim reading of 10% is acceptable. The maximum short term fuel trim is 25%. When the PCM exceeds that, it starts boosting long-term fuel trim, so check both. In other words, a low short term fuel trim with a higher long term fuel trim means you have an air/fuel problem.

What causes excessive fuel trim?
The number one villain is a vacuum leak after the MAF sensor has measured how much air is coming into the engine. That causes the upstream O2 sensor to see a continually lean exhaust and it adds fuel to compensate. Plugged fuel injectors, a bad fuel pressure regulator, and a bad fuel pump can also cause a lean condition.

If the fuel trims are in the normal range, next check the upstream O2 sensors. A healthy O2 sensor should switch between rich and lean at least 8-10 times in 10 seconds. Many times a scan tool won’t react that quickly and that may mislead you. So check the scan tool to see if it displays CROSS COUNTS. That metric actually does the counting for you. Professionals use a scope to check for cross counts. If you find that the upstream O2 sensor ISN”T switching that often, you have a “lazy” sensor. That causes the PCM to react too slowly, forcing the cat converter to see too much fuel, then nothing. That causes the downstream sensor to switch between rich and lean and cause a P0420 or P0430 code. Bottom line: if the upstream sensors are lazy, they’ll cause the downstream sensors to switch and make you think the cat converter is bad. Ignore the problem and the cat converter WILL go bad from all the extra fuel. So replace the lazy upstream sensors, clear the codes, and complete another drive cycle. Click here to understand drive cycles.
CLUE: If the upstream O2 and downstream O2 are both switching rapidly, the cat converter isn’t doing its job. A properly operating system should show rapidly switching upstream sensor and a downstream sensor that rarely switches.

If the fuel trims are ok, and you’ve replaced the O2 sensors, confirmed that the fuel pressure is correct, that you have no excessive blow-by, worn valve stem seals, or coolant leaks, and you still have code P0420, you’ll have to replace the cat converter. Don’t buy a cheap one. It’ll set off the check engine light.”

© 2012 Rick Muscoplat

 

[DaleGrib]

I am trying to get a refund from this shop I feel like they are the biggest idiots..... I know I am not smart by any means on these cars..... but someone please correct me if I am wrong they tried to say P1000 was a transmission code. I am pretty sure p1000 is Emissions related considering the p-0420 code. I was thinking the p1000 meant all the Emissions tests had not been completed.

 

[joegr]

WOW! Yes, P1000 just means the monitors have not all completed since the last reset.

 

[DaleGrib]

WOW! Yes, P1000 just means the monitors have not all completed since the last reset.

Thanks! I guess in this case I knew more than their area manager..... I told them thinking p1000 is a transmission code is enough reason to give me my money back because they don't know what they are doing. I mean I asked them what my fuel pressure was since they did a test. They acted like I asked them the hardest question in the world when I asked what my pressure was. They said why would I need to know that..... I said well my symptoms alone should have got you to break out the fuel pressure gauge.

 

[AmsterDutch]

Thanks! I guess in this case I knew more than their area manager..... I told them thinking p1000 is a transmission code is enough reason to give me my money back because they don't know what they are doing. I mean I asked them what my fuel pressure was since they did a test. They acted like I asked them the hardest question in the world when I asked what my pressure was. They said why would I need to know that..... I said well my symptoms alone should have got you to break out the fuel pressure gauge.

It’s truly amazing that shop is still in business but like the old saying goes...” There is a sucker born everyday” it’s a shame someone hasn’t turned there ass into the better business bureau for ripping ppl off and taking advantage of innocent people who Need there cars fixed properly

 

[AmsterDutch]

Thanks! I guess in this case I knew more than their area manager..... I told them thinking p1000 is a transmission code is enough reason to give me my money back because they don't know what they are doing. I mean I asked them what my fuel pressure was since they did a test. They acted like I asked them the hardest question in the world when I asked what my pressure was. They said why would I need to know that..... I said well my symptoms alone should have got you to break out the fuel pressure gauge.

I’m with you man I’m no expert when it comes to the Lincoln LS by any means ...but thank God for LVC and the Members who know this car far better than a lot mechanic shops...I’ve learned more about this car on this forum than I ever thought I would

 

[AmsterDutch]

I dunno if this helps or not but when I filled up tonight with 93 Octane Ethanol free gas I could smell gas inside the car after for at least 20 minutes. Also the P-0420 code did not happen till after I filled up with gas. Also can a bad fuel pressure sensor cause the p0420 code? Also here is a few videos of examples of my crank that I uploaded that I had on my phone.

The videos finally came through today and I was able to hear the cranking issues...yeah the car sounds good ...it’s frustrating I’m sure.... there is such a long list it could be especially when you haven’t had a hard core code point you in a solid direction ...I still think you should check the plugs and see if they can give you some signs that might shed some light on the subject ...if there white or black it would at least allow you to know a little something remember the 2001 V8 LS has a firing order that is 1-5-4-2-6-3-7-8

 

[AmsterDutch]

This part fits the vehicle you selected:

2001 Lincoln LS


8 Cyl 3.9L DOHC EFI NA

The vehicle options this part fits:

• Production Date: 03/1999-11/2002

Ford Part No.: XW4Z-9F972-BA
Sensor - Fuel Injector Pressure


Part Description Sensor - Fuel Injector Pressure
Replaced By 3R3Z-9F972-AB
Manufacturer Ford. This genuine Ford part is guaranteed by Ford's factory warranty.
Your Price: $106.66
Retail Price: $176.29
You Save: $69.63
Qty:
ADD TO CART
Ships in 1 Business Day
I finally got around to searching out the part and you're correct its on Fords Part Giant website

 

[DaleGrib]

Small update starting getting multiple misfire codes, so I moved the COP's around and it did not make a bit of difference. Got codes P0301,P0302 and P0303.

 

[AmsterDutch]

Small update starting getting multiple misfire codes, so I moved the COP's around and it did not make a bit of difference. Got codes P0301,P0302 and P0303.

Hmmmmm...interesting that these plugs are misfiring all of a sudden...have you had time to inspect the spark plugs?

 

[DaleGrib]

Hmmmmm...interesting that these plugs are misfiring all of a sudden...have you had time to inspect the spark plugs?

I plan to tomorrow I have a spare set of plugs if needed. Also was wondering if you could take a look at my other thread it kinda relates to this I think 2001 Lincoln LS V8 Catalytic Converter question

 

[AmsterDutch]

I plan to tomorrow I have a spare set of plugs if needed. Also was wondering if you could take a look at my other thread it kinda relates to this I think 2001 Lincoln LS V8 Catalytic Converter question

Well....I was under the hood this morning once again looking for the elusive air leak which could be the troubles to my woes...anywho went to start the car and just kept cranking and didn't fire up at all...Listened to make sure the Fuel pump started up under back seat so I could rule that out...started checking fuses ...Engine compartment fuse box first...grabbed the manual and went down the long line of fuses and sure enough pulled out the COP'S fuse and it was split in two...damn talk about lucky lol! Anyway I was wondering if you could do me a solid and take a picture of the back firewall passenger side so I can see where my long ground wire is suppose to post up? Just to give you an idea of where it is it's already posted to the top black metal crossbar that goes across the back ...I believe the cowl seats on the bar I'm talking about ...thanks again ...let me know if you need me to post some pics of the ground wire if you can't find what I'm talking about...its nice you have a 2001 LS V8 we have the same reference in a way...Thanks a million

 

[DaleGrib]

Well....I was under the hood this morning once again looking for the elusive air leak which could be the troubles to my woes...anywho went to start the car and just kept cranking and didn't fire up at all...Listened to make sure the Fuel pump started up under back seat so I could rule that out...started checking fuses ...Engine compartment fuse box first...grabbed the manual and went down the long line of fuses and sure enough pulled out the COP'S fuse and it was split in two...damn talk about lucky lol! Anyway I was wondering if you could do me a solid and take a picture of the back firewall passenger side so I can see where my long ground wire is suppose to post up? Just to give you an idea of where it is it's already posted to the top black metal crossbar that goes across the back ...I believe the cowl seats on the bar I'm talking about ...thanks again ...let me know if you need me to post some pics of the ground wire if you can't find what I'm talking about...its nice you have a 2001 LS V8 we have the same reference in a way...Thanks a million

Sure here you go hopefully this is what you meant. Sorry that I did not see this till just now I had been waiting all day to get a transmission pan gasket changed out. My other one had got some sand in it and it caused it to leak around the front bolts. Funny thing was we cleaned it really well when we changed it a few weeks ago. Almost wondering if that shop that I had trouble with did this some how cause they tried to say they had taken my pan down then the next thing you know they denied it. I had no leaks prior to them touching the car. I would honestly not be shocked at all at this point though if they did. I replaced the gasket anyway just to be safe. Also funny thing they claimed I had metal in my pan or drain plug but when we got it down there is not a trace of metal in the filter or the fluid. Gotta love these scam shops. But in other news I have an appointment tomorrow to get the car checked out and they will be most likely replacing the injectors. The Transmission shop also said today my injectors are highly suspect.

 

[AmsterDutch]

Sure here you go hopefully this is what you meant. Sorry that I did not see this till just now I had been waiting all day to get a transmission pan gasket changed out. My other one had got some sand in it and it caused it to leak around the front bolts. Funny thing was we cleaned it really well when we changed it a few weeks ago. Almost wondering if that shop that I had trouble with did this some how cause they tried to say they had taken my pan down then the next thing you know they denied it. I had no leaks prior to them touching the car. I would honestly not be shocked at all at this point though if they did. I replaced the gasket anyway just to be safe. Also funny thing they claimed I had metal in my pan or drain plug but when we got it down there is not a trace of metal in the filter or the fluid. Gotta love these scam shops. But in other news I have an appointment tomorrow to get the car checked out and they will be most likely replacing the injectors. The Transmission shop also said today my injectors are highly suspect.
View attachment 828571147

View attachment 828571148

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All good news ...glad things are falling into place...I think I see it in the first pic...that bolt sticking out of the fire wall is that silver ground wire posted up with a nut to that bolt? The nut was gone on mine ...I have a extra one so I can connect it back on the bolt if that’s where it goes ...just let me know whenever you get around to it ...no rush ...thanks for the pics I see where the harness is bolted down now also ...the previous owner of my LS jacked the harness up pretty good I think ...not sure what he was trying to do but if he or a shop had to replace something on the back firewall or whatever they didn’t put it back together worth shit lol By the way my P0174 lean code went away now I’m just running rich and th DTC code P0172 is still showing ...a little progress at least ...I’m thinking my injectors are a major suspect also

 

[DaleGrib]

All good news ...glad things are falling into place...I think I see it in the first pic...that bolt sticking out of the fire wall is that silver ground wire posted up with a nut to that bolt? The nut was gone on mine ...I have a extra one so I can connect it back on the bolt if that’s where it goes ...just let me know whenever you get around to it ...no rush ...thanks for the pics I see where the harness is bolted down now also ...the previous owner of my LS jacked the harness up pretty good I think ...not sure what he was trying to do but if he or a shop had to replace something on the back firewall or whatever they didn’t put it back together worth shit lol By the way my P0174 lean code went away now I’m just running rich and the DTC code P0172 is still showing ...a little progress at least ...I’m thinking my injectors are a major suspect also

Yeah the things the previous owners do..... or rather never do in some cases.... lol
Hopefully all goes well tomorrow and My LS will be road worthy yet again. I hope that you are able to pinpoint your issue as well. It seems to be a thing though on these injectors this time of year cause 3 shops I have been into in the last 2 days they were replacing injectors on cars.

 

[joegr]

I wonder if they were talking about GDI injectors? GDI injectors seem to have a noticeably higher failure rate than our old outdated ones. A reasonable theory is that it's due to bad gasoline and infrequent oil changes. Bits of carbon get blown into them and cause them to stick open.
So far at 100K miles, no problems on my one GDI car.

 

[DaleGrib]

Yeah it's possible they were talking about GDI injectors I am not 100% sure on that.

 

[AmsterDutch]

This is a print out of my Bank 1 Sensor 1 the Oxygen Sensor Voltage (V) is the second sequence of numbers in the Data Log ...Bank 2 Sensor 1 is the forth sequence of numbers the STFT is on there right side next to them.... If the front Sensors are jumping up and down frequently and my back Sensors were staying steady does that mean I could have bad O2 Sensors in the Rear especially if my LS is producing a (Rich Code) P0172?.....trying to wrap my mind around this...by the way the time is on the very left hand side or 1st sequence of numbers I had to retrieve this data by emailing it to myself from the scanner...I I’ll try to go back into the App and copy paste so it’s not so confusing
BlueDriver Data Log
Jan 4 2019
Time(s) O2 Bank 1 - Sensor 1 - Oxygen Sensor Voltage (V) O2 Bank 1 - Sensor 1 - Short Term Fuel Trim (%) O2 Bank 2 - Sensor 1 Oxygen Sensor Voltage (V) O2 Bank 2 - Sensor 1 Short Term Fuel Trim (%)
0.00 0.630
0.40 0.667 -16.7 0.654
0.80 0.653 -17.1 0.470 5.7
1.20 0.508 -16.5 0.355 6.9
1.60 0.444 -15.6 0.518 6.0
2.00 0.299 -15.6 0.426 4.7
2.40 0.263 -15.6 0.252 6.0
2.80 0.306 -16.3 0.223 7.7
3.20 0.355 -17.2 0.424 6.9
3.60 0.658 -17.2 0.390 5.4
4.00 0.629 -17.2 0.373 6.5
4.40 0.525 -16.2 0.311 7.8
4.80 0.486 -14.9 0.179 7.8
5.20 0.366 -15.9 0.246 7.8
5.60 0.343 -17.2 0.654 6.5
6.00 0.306 -16.2 0.582 4.7
6.40 0.290 -14.9 0.185 5.9
6.80 0.310 -14.8 0.203 7.7
7.20 0.301 -14.9 0.759 7.0
7.60 0.380 -14.8 0.709 5.5
8.00 0.382 -14.9 0.236 6.5
8.40 0.514 -14.8 0.256 8.5
8.80 0.490 -14.9 0.744 7.3
9.20 0.258 -14.6 0.732 4.7
9.60 0.245 -14.1 0.162 6.0
10.00 0.252 -14.3 0.156 8.5
10.40 0.271 -14.9 0.522 8.3
10.80 0.576 -14.8 0.481 7.8
11.20 0.572 -14.9 0.152 8.0
11.60 0.547 -14.3 0.167 8.5
12.00 0.533 -13.3 0.518 8.6
12.40 0.409 -13.3 0.510 8.5
12.80 0.402 -13.4 0.607 8.6
13.20 0.427 -13.3 0.750 8.8
13.60 0.538 -14.9 0.648 9.0
14.00 0.536 -14.9 0.214 9.1
14.40 0.586 -14.8 0.199 9.2
14.80 0.768 -15.2 0.194 9.4
15.20 0.714 -15.6 0.288 9.2
15.60 0.297 -15.6 0.276 8.4
16.00 0.289 -15.7 0.265 8.5
16.40 0.281 -15.6 0.253 8.1
16.80 0.306 -14.8 0.241 6.2
17.20 0.335 -11.8 0.514 6.0
17.60 0.256 -9.6 0.835 4.7
18.00 0.166 -1.8 0.772 5.0
18.40 0.160 0.4 0.685 6.2
18.80 0.156 20.4 0.722 5.8
19.20 0.281 21.1 0.837 3.2
19.60 0.600 21.9 0.839 3.2
20.00 0.600 22.7 0.840 3.0
20.40 0.636 23.3 0.839 1.6
20.80 0.709 18.1 0.828 1.5
21.20 0.729 18.7 0.805 0.8
21.60 0.774 15.9 0.807 0.7
22.00 0.775 16.3 0.809 0.1
22.40 0.774 14.4 0.793 0.0
22.80 0.786 14.7 0.755 0.1
23.20 0.809 12.1 0.594 0.2
23.60 0.793 12.3 0.218 2.4
24.00 0.759 9.8 0.179 2.4
24.40 0.785 9.9 0.113 3.1
24.80 0.834 7.5 0.104 3.2
25.20 0.828 7.8 0.096 3.9
25.60 0.796 4.8 0.086 3.9
26.00 0.798 5.1 0.076 3.9
26.40 0.804 5.4 0.066 4.3
26.80 0.818 4.8 0.059 4.7
27.20 0.821 3.9 0.061 5.0
27.60 0.823 3.2 0.056 5.5
28.00 0.830 2.3 0.065 5.8
28.40 0.848 1.6 0.060 6.2
28.80 0.844 0.8 0.066 6.6
29.20 0.818 0.1 0.061 7.0
29.60 0.808 -0.8 0.071 7.4
30.00 0.764 -1.5 0.067 7.8
30.40 0.771 -2.4 0.085 8.2
30.80 0.794 -3.0 0.080 8.6
31.20 0.794 -3.9 0.085 8.9
31.60 0.789 -4.6 0.192 9.4
32.00 0.780 -5.5 0.720 7.9
32.40 0.734 -5.8 0.624 6.2
32.80 0.756 -6.3 0.149 7.6
33.20 0.843 -7.0 0.264 9.4
33.60 0.819 -7.8 0.765 8.1
34.00 0.714 -8.5 0.636 6.2
34.40 0.718 -9.4 0.149 7.6
34.80 0.729 -9.7 0.157 9.4
35.20 0.739 -10.2 0.208 9.4
35.60 0.774 -10.5 0.314 9.4
36.00 0.784 -10.9 0.720 8.4
36.40 0.819 -11.6 0.632 7.0
36.80 0.792 -12.5 0.189 8.3
37.20 0.670 -12.9 0.177 10.2
37.60 0.673 -13.3 0.148 10.5
38.00 0.685 -14.0 0.258 10.9
38.40 0.641 -14.8 0.655 9.2
38.80 0.471 -15.2 0.593 7.0
39.20 0.518 -15.6 0.343 8.8
39.60 0.719 -16.0 0.379 10.9
40.00 0.638 -16.4 0.596 10.6
40.40 0.332 -16.4 0.567 10.1
40.80 0.328 -16.4 0.387 9.1
41.20 0.322 -16.7 0.362 7.8
41.60 0.334 -17.2 0.259 8.7
42.00 0.402 -16.9 0.269 10.1
42.40 0.405 -16.4 0.680 9.4
42.80 0.486 -16.2 0.662 7.8