I have 2 supercharged f150s best thing to do is clean all vacuum lines, spray tire wet on all hoses and look for air bubbles. Most hoses that are rotted will suction on throttle
You never needed the fuel pressure regulator at all. The 4.6 and 5.4 engines run at 24 to 29 when engine is idling.. The way to know if the regulator is bad is by shutting the engine off and the rails to hold the pressure. Your lean codes are being caused by a vacuum lineleak at the PCV hose between the rear of the throttle body or a stuck open purge valve
Exactly what my car did two days, ago after I revved her up she struggle to stay idling but ran perfect while driving, all because the regulator closes while driving, and open while idling, yup had a tear in the rubber peace/plunger, when I pulled my vacuum line fuel came pouring out of there and feeding back to my intake manifold and feeding the cylinders extra fuel, yup changed this out two years ago. China junk but the thieves charges us more for these 2.00 dollars parts.
I got my fuel trims as close to 0 as possible on my 98 Ford E250 4.2 l V6 Essex engine I had to replace intake gasket cap off EVAP and PCV lines replaced leaky brake booster and use alot of fuel cleaner and MMO now it's about as best as possible
I don't think that will help you but go ahead put a fuel monitoring pressure gauge on there but I don't think that's going to help your problem. This problem right here is a very hard problem to chase. I've been there. I've done that. I spent a lot of money chasing it reseal the intake. Did all that still have the same code even took it to Ford. After a lot of money there still isn't resolved and they said you know what no refund they actually told me we don't design them. We just try to fix them. It seems to be a common occurrence on the 4.6 5.4. I don't think Ford could even fix it if they do. You may as well just buy a new truck when you're done because that's what how much it's going to cost you
Did you ever pull the the battery neutral for about 15-30 mins to clear your trims and perform the Ford relearn cycle? Process is in the manual if you have it..If not, highly recommend after swapping out any air/fuel related parts & solenois.. Also check for manifold ticks (noisey lifter sounds until manifolds warm up) or any exhaust leaks before the Cats, and full EGR system, etc..Hope this (limited) info helps someone..
Just imagine buying a new car with a 60 or 72 month loan and after 2 or 3 years all these stupid codes popping up and you got to pay car note and insurance and buy gas and oil filters and gap insurance and pay for theses stupid codes
Yes. I got a smoke machine and found that on my 97 there is a rubber elbow way in the back of the intake manifold pointing at the firewall that had degraded and turned to goo and was leaking. Pita to replace but that fixed it. Thanks!
@@aaronsrose I have a 2003 expedition that skipping. Changed all the plugs and double checked the gap before installing. Now I'm only getting these 2 codes so I guess I may have knocked that elbow off or broke it. Thanks for the info cause now when my truck cools off i will check that. Thanks.
Did you hear me saying vacuum leak? Lol Your Short term FTs are not bad (single digits plus or minus). Your LTs are telling the story. High teens (+17) and when you increased the RPM the LTs normalized. Indicative of a mild to moderate vacuum leak. Next video.....the reveal please. Thanks Aaron.
Lol. I'm wondering if the leak is under the dash in the hvac controls. I douched the whole engine compartment down with a half can of ether and it never even so much as twitched. If I can find the vacuum source for the hvac in the engine compartment I'll block it off and see what happens. Thanks again!
I'm tempted by that smoker. The Car Wizard makes that thing look really helpful. (Careful-wise, that's why I didn't record that part. No need for video if it ends up being an insurance claim.)😎
Smoke machine is forthcoming, though that may not be my biggest problem. This morning it started fine but would stumble and misfire when trying to lightly accelerate. Plus at 70F ambient there was a significant amount of visible moisture from the exhaust. I might need to cobble together a leak down tester.
I don't know what for done with Explorer in these year models through I don't know 2,000 2001-2002 minded 2002 anyway and it's got over 300,000 miles on it as well they done something right during this time not saying things will have to be fixed I mean that's just car things break down but 300,000 miles still running strong that's pretty doggone good
That is exactly why farmers no longer buy Fords Ford has lost the farmer which meant a lot. Farmers do not no longer trust Ford you cannot work on them by yourself. You have to take them into the dealership. Farmers do not make that much money. Do you know how I know? Because I live with farmers we will never buy a Ford truck ever again again. In the past it was always a Ford truck but the hell with that you have to take it into the dealership and farmers. We don't make enough money to do that. We keep America fed but we can't afford to pay forward $5,000. Every time we take our truck in there's no way Ford you need to get your act together. Seriously get it together
I dont understand the statemebt cant work on Fords? I mean i wouldn't buy a new ford no matter what and this is a 20 year old vehicle and very eary to work on woth 318k miles...well not easy but a lot easie than any new car. Are GM made any better? Even Toyota starting to show unprecedented quality control problems. Really its all the emissions standard ls making engines less and less reliable.
Fixed my 97 5.8 by cleaning the K&N air filter and MAF
Been chasing this code for about 2 years now lol. Might have to follow the PCV lines right to the intake next. Runs well except at wide open throttle.
I have 2 supercharged f150s best thing to do is clean all vacuum lines, spray tire wet on all hoses and look for air bubbles. Most hoses that are rotted will suction on throttle
The regulator increases pressure when vaccum is low to boost the fuel for acceleration, so its working properly.
You never needed the fuel pressure regulator at all. The 4.6 and 5.4 engines run at 24 to 29 when engine is idling.. The way to know if the regulator is bad is by shutting the engine off and the rails to hold the pressure. Your lean codes are being caused by a vacuum lineleak at the PCV hose between the rear of the throttle body or a stuck open purge valve
Love my OBDLink MX especially for newer vehicles since theres more diagnostic tool available for them.
Unplug neg battery term
Turn head lights on
Run a jumper cable from unplugged neg terminal to positive and wait 20 min
That will reset everything
My 2002 f150 5.4 threw these codes AFTER I took it to the dealer to have my valve cover gaskets replaced. They claimed they could "fix" it for $2900.
Exactly what my car did two days, ago after I revved her up she struggle to stay idling but ran perfect while driving, all because the regulator closes while driving, and open while idling, yup had a tear in the rubber peace/plunger, when I pulled my vacuum line fuel came pouring out of there and feeding back to my intake manifold and feeding the cylinders extra fuel, yup changed this out two years ago. China junk but the thieves charges us more for these 2.00 dollars parts.
Spark plug wires, new coil, new plugs then, if that doesnt do it, then its a sensor
I think you should have done a intake gasket replacement job and cleaning the passages too I did that it helped a lot
I got my fuel trims as close to 0 as possible on my 98 Ford E250 4.2 l V6 Essex engine I had to replace intake gasket cap off EVAP and PCV lines replaced leaky brake booster and use alot of fuel cleaner and MMO now it's about as best as possible
Usually a fuel pressure regulator don't go bad I have the original in my van my fuel system is the return type too
I don't think that will help you but go ahead put a fuel monitoring pressure gauge on there but I don't think that's going to help your problem. This problem right here is a very hard problem to chase. I've been there. I've done that. I spent a lot of money chasing it reseal the intake. Did all that still have the same code even took it to Ford. After a lot of money there still isn't resolved and they said you know what no refund they actually told me we don't design them. We just try to fix them. It seems to be a common occurrence on the 4.6 5.4. I don't think Ford could even fix it if they do. You may as well just buy a new truck when you're done because that's what how much it's going to cost you
318k nice keep her going. Got 437k on my 4.6, just got this code along with P0174 fun fun gonna dive into it this weekend.
I’ve been chasing p0171/p0174 code in a 1998 f150 4.6 liter for a month now. But the engine runs like a champ, no issues at all.
Mine had no real drivability issues, just the CEL was annoying me. Was a bad rubber fitting at the way back of the intake manifold. Thanks!
I have same truck, and working on the same codes. Just replaced some pcv elbow and emissions elbow. I really love my truck. Triton is the best motor.
@@jeancorlette5350Did you fix The Problem Code?
@@aaronsroseHow did you fix The Codes?
13Ghosts how did you Fix The problem?
Sounds like a Hoover upright.
Vac leak. Pcv hoses. Red plastic line at back of intake. Plenum o rings?
fuel pump wouldnt let it run under load. You replaced it. You good. Thats not that rough of an idol from my experience. Hope it all worked out.
Sound kinda like Art Bell late nite in Navada
Excellent content
Yep my brake booster was hissing
Did you ever pull the the battery neutral for about 15-30 mins to clear your trims and perform the Ford relearn cycle? Process is in the manual if you have it..If not, highly recommend after swapping out any air/fuel related parts & solenois.. Also check for manifold ticks (noisey lifter sounds until manifolds warm up) or any exhaust leaks before the Cats, and full EGR system, etc..Hope this (limited) info helps someone..
Just imagine buying a new car with a 60 or 72 month loan and after 2 or 3 years all these stupid codes popping up and you got to pay car note and insurance and buy gas and oil filters and gap insurance and pay for theses stupid codes
I would replace my FP reg just don't really need to and I can't afford it
very good info
Having the same problem did you ever find out what it was
Yes. I got a smoke machine and found that on my 97 there is a rubber elbow way in the back of the intake manifold pointing at the firewall that had degraded and turned to goo and was leaking. Pita to replace but that fixed it. Thanks!
@@aaronsrose thank you I'll have to check it
Replace that elbow with a 90° sparkplug boot and never have the problem again
@@aaronsrose I have a 2003 expedition that skipping. Changed all the plugs and double checked the gap before installing. Now I'm only getting these 2 codes so I guess I may have knocked that elbow off or broke it. Thanks for the info cause now when my truck cools off i will check that. Thanks.
Did you hear me saying vacuum leak? Lol Your Short term FTs are not bad (single digits plus or minus). Your LTs are telling the story. High teens (+17) and when you increased the RPM the LTs normalized. Indicative of a mild to moderate vacuum leak. Next video.....the reveal please. Thanks Aaron.
Lol. I'm wondering if the leak is under the dash in the hvac controls. I douched the whole engine compartment down with a half can of ether and it never even so much as twitched. If I can find the vacuum source for the hvac in the engine compartment I'll block it off and see what happens. Thanks again!
@@aaronsrose Now U need a smoke machine. Lol. I've seen vids where they use propane to find the smaller leaks. Be careful sir. Interesting.
I'm tempted by that smoker. The Car Wizard makes that thing look really helpful. (Careful-wise, that's why I didn't record that part. No need for video if it ends up being an insurance claim.)😎
@@aaronsrose Search diy automotive smoke machine. Construct it. Vid it. I'll watch. Lol.
Smoke machine is forthcoming, though that may not be my biggest problem. This morning it started fine but would stumble and misfire when trying to lightly accelerate. Plus at 70F ambient there was a significant amount of visible moisture from the exhaust. I might need to cobble together a leak down tester.
I don't know what for done with Explorer in these year models through I don't know 2,000 2001-2002 minded 2002 anyway and it's got over 300,000 miles on it as well they done something right during this time not saying things will have to be fixed I mean that's just car things break down but 300,000 miles still running strong that's pretty doggone good
Pre 2004 Fords were pretty darned reliable in general. Thanks!
Use pipe tape on them fittings
thank you
Change the upstream b 1 s 1 oxygen sensor
That is exactly why farmers no longer buy Fords Ford has lost the farmer which meant a lot. Farmers do not no longer trust Ford you cannot work on them by yourself. You have to take them into the dealership. Farmers do not make that much money. Do you know how I know? Because I live with farmers we will never buy a Ford truck ever again again. In the past it was always a Ford truck but the hell with that you have to take it into the dealership and farmers. We don't make enough money to do that. We keep America fed but we can't afford to pay forward $5,000. Every time we take our truck in there's no way Ford you need to get your act together. Seriously get it together
What vehicle company will you go for now
Farm owners make a bunch😮
Farm. Vehicle. Dodge Ram
I think the bigger issue is there are very few farmers. You can’t service a GM or a Dodge anymore either
work on your english my man
Reset pcm after everything
This video really doesnt get you any info about lean code. I does tell ya how to check out a pressire regulator
I have 1990 with the same problem tha
I dont understand the statemebt cant work on Fords? I mean i wouldn't buy a new ford no matter what and this is a 20 year old vehicle and very eary to work on woth 318k miles...well not easy but a lot easie than any new car. Are GM made any better? Even Toyota starting to show unprecedented quality control problems. Really its all the emissions standard ls making engines less and less reliable.