check engine light?

did you erase the codes after replacing those items? if not go over this guide to get the codes and report back.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

joe

yes i have to codes erase

at this point then I would check fuel pressure, and the engine coolant temperature sensor, I 'll send u alink that will show you how

this link will show you how to check fuel pressure.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Please run down this guide and report back.

the engine coolant temperature sensor may be telling the computer that its cooler than it supposed to be, thus the computer will start dumping fuel into the combustion chamber throught the injectors, I dont think that you have several bad injectors although it is possible

i are sorry but when i looked at the emission report it said bank1 ans bank2 too lean not to rich what does this mean? thanks for all the help

you still will need to check fuel pressure, low pressure could indicate a bad regulator of clogged fuel filter

My car engine light came on for a p0112 code. went through fault isolation guide and change out air intake sensor then cleared code. light came on again and gave same code. What could my problem be?

20) For KOEO & KOER Only DTC P0112 Or P0117: Simulate Opposite Signal To PCM
DTC P0112 (IAT) or P0117 (ECT) indicates sensor signal is less than self-test minimum. Minimum signal for IAT and ECT sensor is .2 volt or 250°F (121°C). Possible causes for these faults are:
Circuit Grounded In Wiring Harness
Faulty Sensor
Faulty Connection
Faulty PCM
Turn ignition switch to OFF position. Disconnect suspect temperature sensor connector. Inspect connector for loose, damaged or corroded terminals. Repair as necessary. Connect scan tool to Data Link Connector (DLC). Turn ignition switch to ON position. Using scan tool, access ECT-V or IAT-V PID from PID/DATA MONITOR & RECORD menu. For LS and Thunderbird with electronic throttle control, if PID value is 4.2 volts or less, or -40°F (-40°C) or more, go to step 22). All others, go to next step. If PID value is more than 4.2 volts, or less than -40°F (-40°C), replace faulty temperature sensor.


90) For Continuous Memory Only DTCs P0112, P0113, P0118, P1112 & P1117: Check For Intermittent
These DTCs indicate possible intermittent fault. Possible causes for these faults are:
Faulty Sensor
Faulty Sensor Connector
Open Or Grounded Circuit In Harness
Faulty PCM
Connect scan tool to Data Link Connector (DLC). Turn ignition switch to ON position. Using scan tool, access ECT-V and IAT-V PID from PID/DATA MONITOR & RECORD menu. While observing appropriate PID, tap on sensor and wiggle sensor connector to simulate road shock. If no change in PID voltage reading occurs, go to next step. If any change in PID voltage reading occurs, turn ignition switch to OFF position. Inspect connectors for loose, damaged or corroded terminals. Repair as necessary. If connectors are okay, replace faulty temperature sensor. If directed here for Continuous Memory DTCs P1112 and P1117, perform DRIVE CYCLES to verify repair. Repeat QUICK TEST.

When I start my truck, it cranks up but if I don't keep my foot on the gas it turns off. I took it to Meinke in February to get a tune up due to the check engine light being on. About a month later the light came back on I took it back and the guy told me it had to do with my gas pump being clogged. I notice that when I'm driving it seems like it wants to stop but when driving it runs smoothly.

What's the exact code numbers you have? Also what size engine do you have?

I have to look the paper up for the code my engine is 4.6

Will the paper have the new codes after the repair and the light came back on?

Engine Performance problem
2003 Ford Expedition V8 Automatic 165000 miles

I have replaced coil pack & spark plug 7 because after a heavy rain, water pools in that area. After this rain and getting the same work done, the engine light stayed on, the mileage went from 18 to 13 and the engine seems to sputter, especially at lower speeds. I previously had 2 coil packs, #4 and #7 replaced and all spark plugs replaced. I've heard there may be a wire issue with the fuel injector. Can you help?

Honestly, the injectors on this vehicle are the most reliable part of the car, but that doesn't mean they can't go bad. Has the check engine light come back on for you for the same cylender?

yes

Chances are either you are losing the signal for the injector or the boot that covers the plug is allowing an arc. Have you checked it closely for any evidence of that happening?

My ford expedition svc light came on the second it began running rough & misfiring..i had it the problem diagnosed at local auto parts & just as i expected it was one of the cop's...i made the replacement & the truck runs like it should...but my svc engine light is still shining - was there another step i left out?

[quote:45f91e3cd3="texdram"]Computer problem
2003 Ford Expedition V8 Two Wheel Drive Automatic 113000 miles

My ford expedition svc light came on the second it began running rough & misfiring..i had it the problem diagnosed at local auto parts & just as i expected it was one of the cop's...i made the replacement & the truck runs like it should...but my svc engine light is still shining - was there another step i left out?[/quote:45f91e3cd3]

Hello,

No, you will need to go back to the parts store and have them clear the code. Or you can wait 500 - 1000 miles or 50 - 100 key starts to reset light.


.

[quote:7687fc6ea1="obxautomedic"][quote:7687fc6ea1="texdram"]Computer problem
2003 Ford Expedition V8 Two Wheel Drive Automatic 113000 miles

My ford expedition svc light came on the second it began running rough & misfiring..i had it the problem diagnosed at local auto parts & just as i expected it was one of the cop's...i made the replacement & the truck runs like it should...but my svc engine light is still shining - was there another step i left out?[/quote:7687fc6ea1]

Hello,

No, you will need to go back to the parts store and have them clear the code. Or you can wait 500 - 1000 miles or 50 - 100 key starts to reset light.

makes sense - many thanks!
.[/quote:7687fc6ea1]

Computer problem
2003 Ford Expedition V8 Four Wheel Drive Automatic
----------------------------------------------------------------
can trouble codes be retrived withouy scan tool ?

[quote:c719bb5b24="jpstapp"]Computer problem
2003 Ford Expedition V8 Four Wheel Drive Automatic
----------------------------------------------------------------
can trouble codes be retrived withouy scan tool ?[/quote:c719bb5b24]


You need an OBDII reader
they are cheep enough try it on line or some part stores have it for sale
also they can scan it for you too

Engine Performance problem
2003 Ford Expedition V8 Two Wheel Drive Automatic

Hi, I am trying to an answer or orientation to fix a stubborn problem I am having with my 2003 Expedition. The check engine light came on and it gives me P0171 & P0174. I replaced the oxygen sensors but had no luck. I also just had it tuned up with autolite spark plugs, oil change, air and fuel filters. I also replaced a spark plug coil that was not working. Had the check engine light turned off but still persistent. Went to a garage and had the fuel injectors cleaned but no luck. Someone told me to check the engine compression, Can you point me in the right direction or suggest something I am out of ideas. I would greatly appreciate it, Thanks.

[quote:d509f9e4be="Ultralub"]Engine Performance problem
2003 Ford Expedition V8 Two Wheel Drive Automatic

Hi, I am trying to an answer or orientation to fix a stubborn problem I am having with my 2003 Expedition. The check engine light came on and it gives me P0171 & P0174. I replaced the oxygen sensors but had no luck. I also just had it tuned up with autolite spark plugs, oil change, air and fuel filters. I also replaced a spark plug coil that was not working. Had the check engine light turned off but still persistent. Went to a garage and had the fuel injectors cleaned but no luck. Someone told me to check the engine compression, Can you point me in the right direction or suggest something I am out of ideas. I would greatly appreciate it, Thanks.[/quote:d509f9e4be]

Hello,

The exhaust system is used to transfer exhaust gases to the rear of the vehicle. If an exhaust leak is present before the oxygen sensors it can cause the sensor to produce a false reading. You might say a leak will not affect the reading because the exhaust is simply leaking out. The problem is that theory is not exactly true. Engine exhaust is produced in pulses as the cylinder's fire. When the exhaust valve opens pressure is created in the exhaust system while the spent mixture exits the combustion chamber. But then a vacuum condition in the exhaust is created after the exhaust valve closes. This vacuum condition can draw raw oxygen from outside of the system and cause a false reading. To inspect for an exhaust leak, start with a cold engine. Then have a helper start the engine and hold the idle at about 1500 rpm. Next, try to listen for any exhaust noises coming from any part of the exhaust system including the exhaust manifold and head pipe. Also look for black soot at any point in the system as this can be the source of an exhaust leak. If an exhaust leak is detected repair leak and recheck system.

The correct fuel delivery is essential for proper engine operation. This means if the fuel delivery is impaired for any reason it can cause a lean mixture code. The main reasons for this condition are plugged fuel filter or weak fuel pump operation.

Your engine is designed to run on specific values, if there are no codes besides a lean mixture code and the engine is running ok the problem is a sensing value problem. A MAF (mass air flow) sensor is famous for causing such a problem. Example: Let's say the engine is running at 2100 RPM at any particular time. When a MAF fails it sends feedback information to the ECM/PCM that the engine is running at 1800 RPM so the computer will lean down the mixture. But the engine is running at 2100 rpm so the mixture is detected lean by the oxygen sensor and the computer will illuminate the CEL (check engine light). There are a few main reasons the MAF reading can be incorrect. First the air intake boot could be cracked or ripped allowing non-metered engine air intake to be consumed. Or the MAF fails because the sensing element inside the sensor becomes contaminated from impurities from the air the engine consumes. Sometimes this element can be cleaned with an aerosol cleaner such as carburetor cleaner. I have had limited success cleaning the MAF sensor, replacement at this point is best. Repair or replace failed components as needed and recheck the system.

Your engine is designed to run on its ability to hold vacuum. If vacuum is allowed to leak it will cause a lean mixture condition. Vacuum hoses are typically connected to the engine intake manifold and will supply engine vacuum to various accessories like power brakes. Some cars are designed with a larger vacuum transfer hose like Ford that connects the intake manifold to the IAC (idle air control) motor. A broken or dilapidated vacuum line can cause the engine to lose vacuum which will cause a lean mixture code. Inspect all engine and accessory vacuum lines to look for missing, torn or dilapidated lines and replace as needed. Also have a helper rest their foot on the gas pedal just enough to keep the engine running. Check the engine when it is running to listen for any whistling noise coming from the engine that is not usually present. Follow the noise and inspect vacuum lines in that area. In addition when the engine is running it will pull inward a broken or weak piece of the hose to create a larger vacuum leak. Check the integrity of all vacuum hoses at each end of the hose. Typically this is where a vacuum hose fails. Replace any vacuums hoses that have failed, clear codes and recheck system.


.

Try removing the Mass Airflow Sensor (MAF); clean the two wire elements with brake cleaner, and blow dry with shop air. Give the MAF elements a good soaking with brake cleaner.

The codes you have are "Lean" codes registered by the oxygen sensor(s). The reason this happens is that contaminants burning onto the MAF elements cause the elements to be insulated, falsely registering less airflow to the engine. Thus, the engine computer (PCM) thinks it is under a light load, and thus results in less fuel being injected by the fuel injectors. Therefore, the oxygen sensors relay information back to the PCM saying "Lean". You have P0171 and P0174. Both these screaming "lean" at the same time indicates the problem is someplace upstream, feeding both banks of cylinders at the same time.

If cleaning the MAF does not work, hook up an OBD-II scanner and obtain the air flow rates calculated by the PCM. Floor the accellerator pedal for a brief moment (don't over-rev the engine) and note the maximum airflow rate. I can provide you the Cubic Feet per Minute value ranges. (But I need to know if you have a 4.6 or a 5.4 engine.) If the values recorded by your OBD-II fall outside the parameters, clean the MAF again, longer soaking in brake cleaner, and re-test. Replace the MAF if your airflow values don't match spec.

Use a good quality air cleaner element, and I suggest you going with factory Motorcraft spark plugs next time. They are worth it. Finally, don't feel bad about your failed coil... these are common unfortunate replacement parts.

When I'm at a complete stop and start to accelerate and go or on a freeway and try to accelerate, my engine starts to jerk and miss like crazy. The check engine light is not on so I really don't know whats going on. I had an auto repair shop put it on the diagnostic machine but he said nothing came up as a problem. Now I'm stuck with no answer and afraid to drive my expedition. Can anybody tell me whats going on and/or what I can I do to fix my expedition?

I'm surprised that the check engine light didn't come on. It sounds like a misfire. When was the last tune up? Have you ever checked the fuel pump pressure?

Let me know. Also, I need to know which engine you have.

Joe

My truck has a 5.4L engine and no I haven't had a fuel pump pressure check. I've never had the spark plugs changed yet but I will.