Seems to be a fairly common problem but two different mechanics have been unsuccessful in fixing it. The service engine soon light lit on my 2001 f150 w 5. Ford f150 service repair manual ford f150 pdf downloads. When you take it apart and take the hose off, you will see the. A bad sensor can confuse the computer, causing it to mix the air fuel ratio to run lean. Buy ena pack of 8 curved boot ignition coil compatible with ford lincoln mercury 4. This 2005 ford truck has the classic lean dtcs p0171 and p0174. At an idle it sounds like they have a wicked cam and stall converter.
Overview if youve stumbled upon this site, you probably own a 2001 2004 ford f150 with the 4. Learn what does p0174 2001 ford f150 system too lean bank 2 means, location and how to repair. Then, out of nowhere, after a long idle in gear with foot on brake, such as in a drivethru line my truck would start to shake. Typically the code will be triggered by a rich condition in the engine.
My f150 has rough idle and sputters on acceleration what is wronge 2001 ford f150 i changed all four o2 sensors and still the same thing i cant get a diognostic because the engine light wont stay lit but it does blink perodically then goes off it sputters bad. A scan tool with live data capability is a must, to test diagnostic trouble codes p0172 and p0175. This would be the opposite of a lean condition, whichll throw p0171. What are the symptons of a malfunctioning mass airflow sensor on 2001 ford f150. They are both throwing sytem lean bank 1 system lean bank 2 codes.
The truck starts to stall out if i floor the gas pedal at any speed from 30 to 60 mph. Check out my online store and pick up all your mechanic s. Ford tsb 0417 4 details procedures for checking fuel trim and looking for vacuum leaks. Sometimes it said it was running lean in bank one, sometimes it said it was running lean in bank two. View katriina uusitalos profile on linkedin, the worlds largest professional community.
Car complaints, car problems and defect information. Ford f150 knocks and misfires bad all of the sudden 25 answers. If the f 150 is a computer controlled model, check the computer codes. Vacuum leaks another common cause of ford p0171 and p0174 ean codes is an engine vacuum leak. Ive had these codes for a few years with no noticeable problems. Ford f150 knocks and misfires bad all of the sudden cargurus. This article will help you to diagnose diagnostic trouble code p0171 system too lean bank 1 andor p0174 system too lean bank 2 on your ford, mercury or lincoln 4. The latest is its running lean on bank 1 and misfire on cylinder 1.
The 2001 ford f150 has 1 problems reported for bank 1 and bank 2 lean. Then miraculously it clears up and the af ratio goes back to normalthen everything is fine and normal. P0171 and p0174 system too lean, banks 1 and 2 long term fuel trims are all around 30%. Orchestrating regional innovation ecosystems laurea. I have been having an issue where when i pull up to a stop sign or a red light the idle will be rough and it will feel like it wants to stall but doesnt. There arent usually any drivability issues associated with p0172. Department of commerce, and trade and economic sanctions maintained by the treasury departments office of foreign assets control, in regard to products purchased on this website. How do you fix bank 1 and 2 if they are too lean and the codes and come up with p0171 and p0174. Anyone who ownsdrives one of these trucks is very likely to come across the dreaded p0171p0174 service engine soon light.
You agree to comply with all applicable export and reexport control laws and regulations, including the export administration regulations maintained by the u. Lean condition diagnosis on a ford p0171 p0174 youtube. I replaced the mafill go ahead and replace the pcv valve. P0171 ford tech notes if the p0171 is combined with the p0174 code, its very likely that the problem is caused by an intake leak.
It also appears the when it warms up the rpms tend to fluctuate. Most buyers choose one of the v8s, which are smoother, quieter and more potent. If the lean codes keep coming back, the maf sensor may have to be replaced if the engine does not have a vacuum leak or fuel delivery problem. Orchestrating regional innovation ecosystems espoo innovation garden this book was created as a part of the eka c forerunner area helsinki region project, financed by the european regional development fund, laurea university of applied sciences, aalto university, city of. Although you can apply this info to any ford vehicle with a v6 or v8, this info concentrates on the ford 4. A friend of a friend ran the codes for me and it came up with a maf issue, the friend told me where the maf is and how to clean andor change it, but he also mentioned something on.
I took it to the local ford dealer and paid 70 bucks to have it hooked to their dia. Shakes, stumbels, wants to stall, it drops 500rpms, like running on 4 cylinders. Light came back on, little shake at idle, shaking and sputtering while accelerating, loss hp. I tried my best to figure out the dreaded and feared lean bank one error, but nothing was working. This winter i started popping up codes that the engine was running to lean.
However, it is running exactly the way it did when i had a misfire on 7. Engine light always comes back on in about 23 weeks. I have replace all of the 02 sencers, coil pack, fuel pump. What are the symptons of a malfunctioning mass airflow. The p0172 code on a ford f150 will often be thrown if the fuel injection system is not operating properly. With the airfuel mixture ratio selflearning control, the actual mixture ratio can be brought closely to the theoretical mixture ratio based on the. I checked the code and it came up as a p0171 and p0174 system lean bank 1 and 2 respectively. I would first check for codes and see if it is a misfire or a running lean code. I just came across this post i have a 2000 f150 supercab 4x4 with 5. Rockauto ships auto parts and body parts from over 300 manufacturers to customers doors worldwide, all at warehouse prices.
Rich goes over common problems with a ford f150 with a 5. The next morning it was knocking and running on what sounded like 3 or 4 cylinders. Coils free delivery possible on eligible purchases. The site for ford truck owners, by ford truck owners. Running rough, slightly laggy, poor gas mileage, seems to be running rich going off what ive read here and elsewhere. The other night had real bad miss put heet water remover in tank by god it stopped the miss. Replace the hose in the back of the air intake manifold. My f150 has rough idle and sputters on acceleration what.