Guests - If You want access to member only forums on FM. You will gain access only when you Sign-in or Sign-Up on Fishing Minnesota.

It's easy - LOOK UPPER right menu.

Sign in to follow this  
Followers 0
stmichael

2000 F-150 Fuel too lean Bank 1 and 2

16 posts in this topic

5.4 liter

I have this causing my SES light to come on. I have replaced the (4) O2 sensors... Which was probably needed anyway(?) crazy.gif. But, the problem still exists. I added fuel injector cleaner, yesterday, and have only went 40 miles since adding it. (as I am assuming the problem is plugged or partially plugged injector or 2). Would this be a correct evaluation of the problem? The thing is I went to checker to use their "free" code reader and the code I believe was p0170, and there was the EVA deal flashing on the top of the reader as well, this is apparently a brand new, updated code reader? I should have written it down, but, anyway, the reader also said that on bank one and two the fuel pressure was at 10.2% and the other was at 8.4% on both banks, (I do not know why the two different psi's). Or is my problem something else? Fuel filter is about 8 months old. I can clear the SES light but it will come back on after about 50 miles.

As for now the truck is running fine with no problems, if it is the injectors can you clean them or just replace?

Thanks for any help!

Mike

Share this post


Link to post
Share on other sites

I would think those injector reading's are with in spec... It is rare, but you could have a leaking intake manifold. The easiest way to check for that is to spray carb clean around intake and see if you idle climes up (PLEASE USE CAUSION WHEN DOING THIS. ANY SECONDARY ARCHING FROM PLUG WIRES CAN CAUSE A FIRE). If this is not the case, I would take it in to local dealership and have then tell you what is wrong. The diagnoses charge is about the same as a local garage, but the diagnoses is about 97-98% accurate. The main reason I recommend going is because it just might be a P.C.M. update. If this is the case, the diag. and repair is covered by 8 years/80,000 mile federal emissions warranty (this is new software for you trucks computer). Besides the little "blown spark plug thing", the 5.4l is a great and almost problem free motor.

I have very rarly ever replaced inj. because of clogging. The ones I have replaced were because of an "Elec. failure" inside of them. If an inj. was the cause, you would notice a runnning concern. If I was in vegas, I would bet on PCM update. If your truck is over 80,000 miles, it is a cheap fix. 9 times out of 10, you can even wait for it, if genstar,WDS or Palm Piliot are not being used in shop. I know all you dealship guys would kill me for saying "Waiter".

Share this post


Link to post
Share on other sites

I'd have to second the intake gaskets/intake leak. The 5.4 is not as common as the 4.0 SOHC, but you do see a few.

Since I have started a motor on fire with carb spray and was trapped between a burning motor and a drivers door that did not work I do not reccommend or use carb spray anymore. Most shops have a smoker. It introduces a pressurized smoke into the intake through a vacumm port. Whever there is smoke there is a leak.

Share this post


Link to post
Share on other sites

AHHH! The evaporative emissions leak detector. Most dealerships (and small garages as well) have this device. I do use carb spray in a pinch. I should add, I will “hot soak” the eng. Before doing this (this means spray water over a warm eng. While running) to check for any arching. A diag charge is a cheaper price to pay than burnt wiring repairs or your health. Good advice Airjer!

Share this post


Link to post
Share on other sites

I dont know the milage that is on your truck. The codes set were most likely p0171, and p0174. The fuel numbers you were refering to are the fuel trim percentages (pcms corrected fuel percentage) anything below 15 shouldnt make the ses come on. As for intake gasket leaks, they are not very comon on the f150s. I would start off by cleaning the mass airflow sensor with brake clean with key off. I would then look at the rubber elbows for vacuume hoses, they have a tendency to crack and leak at the rubber elbows, one in front and one in the back of the throttle body. I would also replace that fuel filter, you said it is only 8 mos old, but didnt say how many miles, 15k it should be replaced.Then if you dont find anything, I would then bring it to the dealership, as they see the trucks everyday and know what to look for, and can update the pcm if needed.

Share this post


Link to post
Share on other sites

Thank you all for the replies,

the mileage is about 134000

Share this post


Link to post
Share on other sites

Quote:

I would start off by cleaning the mass airflow sensor with brake clean with key off. I would then look at the rubber elbows for vacuume hoses, they have a tendency to crack and leak at the rubber elbows, one in front and one in the back of the throttle body.


Carb spray would be a better choice. I've seen some brake cleaners destroy parts upon contact. Most carb sprays are "sensor safe".

Any moderate vacuumm leak can cause this type of code. A good shop with a smoker will be able to find it if it exists. Typicall these show up with colder weather so there may be a chance that they will want you to leave it over night so they can check it with the engine as cold as possible. Some of these will clear up with the warmer weather and will not show themselves again until the fall.

Share this post


Link to post
Share on other sites

I was just looking on another site,I think I have found the problem, it is with the Mass Air Flow Sensor, I had installed a K&N air filter and one of the techs pointed out that the oil comes of the filter and will gunk up the sensor. I thank you all for the information, I might have to go back to using a OEM filter, I guess I will see if this is the actual problem and will post tomorrow. Airjer, thanks for the heads up on the carb cleaner, My first thought was break clean as well.

I suppose had I posted this little tidbit of information You guys would have figured it out as well!

Thanks again,

If this and the other possibilities mentioned it will be stopping in at the local Ford dealer. I am done throwing money away. Last week when the light came on, I looked up the code and the guy behind the counter said it was a O2 sensor, but, could not tell me which one, so, I bought both pre cat. $117., this is not going to be good if all I had to do was clean off the MAS... crazy.gifcrazy.gif, Oh well, A person tries to save a buck and do it themselves... not any more for this guy... at least the diagnostics.

Share this post


Link to post
Share on other sites

Most carb sprays will work if they are non- chlornated, otherwise they put a film ontop of the sensor, inwhich will do more harm then good. Alot of brake clean now is electrical contact cleaner also, and wont leave this film behind. And this is what the ford hotline engineers have told us.

Share this post


Link to post
Share on other sites

I have to print this page... too much stuff to remember. grin.gifgrin.gif

Thanks again guys!

Share this post


Link to post
Share on other sites

AHA! The old k&n trick. You should be able to see some debris build up on the sensor if it is dirty. It is the very tiny resistor looking thingy that hangs down. Usually you will get some funky driveability symptom when these get dirty as well. Usually poor accelleration or poor performance under load. Interesting that it only showed up as a check engine light!!

Isn't everything non chlorinated now?

All I know is we had one brand of brake cleaner that will melt netrile gloves, Self destruct certain kinds of plastic, and would melt brake dust into the clear finish of aluminum wheels. We have changed brands!!! grin.gif

Share this post


Link to post
Share on other sites

I think if you buy a known brand of either I think you would be fine, but if you find some stuff for .69 cents, I would be hesitant to use it either way.

Share this post


Link to post
Share on other sites

Agreed! wink.gif

Share this post


Link to post
Share on other sites

Quote:

AHA! The old k&n trick. You should be able to see some debris build up on the sensor if it is dirty.


Yes, the sensor was a little dirty... OK it was very dirty. I used non-chlorinated brake clean. I could watch the build up wash away.

Well, I have driven 35 miles, since cleaning the MAS, I had to disconnect the battery to clear the SES light. Now it is a waiting game to see if it comes back. I went back to the local Checker and tried hooking up the code reader to see if it would give any information on how things are going. I guess as long as the SES light is out, you are not going to get any information out of the reader/computer(truck).

airjer, 4wanderingeyes, and, shackbash, Thanks again for the help.

Share this post


Link to post
Share on other sites

Correct! Yes, disconnecting battery for about 10 minutes does clear memory.

Share this post


Link to post
Share on other sites

Quote:

Besides the little "blown spark plug thing", the 5.4l is a great and almost problem free motor.


I got to deal with this three years ago, besides this catastrophy I have really enjoyed my 99' 5.4L. The warning sign was there, I didn't know what it was and it reared its ugly head. Kaboom at 70 m.p.h while pulling my boat 300 miles from home. Thank god for extended warranty.

Share this post


Link to post
Share on other sites
Guest
This topic is now closed to further replies.
Sign in to follow this  
Followers 0



  • Posts

    • SweetsFishing
      1-18-17 Fishing Report. The fishing on LOTW remains fairly consistent in the last week with several Walleyes and Saugers in the 12.5-16 inch range being brought up the holes mixed in with a few larger sized perch,pout and tullibees in the 30-33 feet of water range. Meanwhile,in the 16-20 feet of water range the bite remains fairly steady with both smaller and keeper sized walleye and saugers being caught. The bite in both depths seems to not really pick up until around 10 am most days and seems to almost slow down around 4 pm. Live fat heads have been the bait of choice using a plain red hook or a glow in the dark pink or gold gem-n-eye on a dead stick,jigging a minnow has been effective as well using clam jigs or a demon jigging spoon or charmer with glow in the dark pink,green or hammer gold being the colors of choice. Heading into the weekend with the warmer weather continuing to move in we remind you to please,check with a resort,outfitter or bait shop before venturing out on the big lake as the ice conditions may change daily. We hope to see everyone on beautiful Lake of the Woods very soon!
    • Dabignorski
      Wondering if anyone has been out on Christmas yet this year. Thinking about going this weekend and live a ways away. I know it is one of the later lakes to freeze up. Thanks in advance.
    • ANYFISH2
      It sounds like there definitely can be a worthwhile night bite.  The type of structure seems to dictate how good it can be. "Smaller" humps, or structure by itself seems to produce better then the breaklines along the numerous flats.  It seems "smaller" structure topping out 10 to 15 feet surrounded be deeper water is best.   Good luck, and report back.
    • eyeguy 54
      nephew was fishing a bobber and had another hole about 4 feet away. dropped the vex in and saw a mark and said, I'll get that crappie. Wham!  thought it was a northern. wrapped into his bobber line and had a great fight.  totally surprised when the perch popped up the hole. lol 
    • delcecchi
      Hey, I expressed what I have heard from the locals.   We have been summer folks for quite a while so get some access to the feelings of the locals, like our next door neighbors.      The Landing seems to have made a deliberate business decision to not target local folks but rather upscale tourists.   That is their privilege.    I choose not to patronize them.     As a guy I used to know at IBM said  "that's not the target market".  I am not the Landing's target market.      See you at the Crescent.   (or South Switch.)   (or the VFW in cook for burger night)    Lots of places to go if I want upscale.  Whistling Bird in Gilbert, several places in Ely, etc.