Ford F-150 (2004-2008) :: Running Rough With Code P0171 - Engine Light Stays On?
I just started to have this problem yesterday. Engine light comes on and stays on. Engine shakes and truck won't go over 50 MPH. Autozone code checker came up with P0171.
Truck has about 95K miles and I had the spark plugs replaced at 75K miles.
Transmission was rebuilt at around that time also.
I only drove it to Autozone and back today to post the code and see what everyone's opinion is as to what's wrong.
Here's what the printout says : P0171 "Fuel Trim Bank One Condition"
Ford F-150 (2004-2008) :: Stumbling / Running Rough - Check Engine Light Is Either On Steady Or Flashing
Got an 07 Screw with only 50,000 miles. Yesterday, wife drove it home from work and said it would only do 45mph and didn't sound good. No warning lights were on, she said. I test drove it in the evening and it ran totally fine. Today, she drives it to work and said it ran real rough and "Check Engine" light was on. I picked it up from her work and it idles very rough and slow, and once you hit about 2000 rpm, it runs decent, maybe even normal. Below that, it stumbles and engine doesn't sound right. "Check Engine" light is either ON steady, or flashing. I don't have a code reader, so its likely going to the Ford Dealer Monday. Is there any way to read the code without a reader?
View 11 RepliesFord F-150 (2004-2008) :: Check Engine Light Flashing - Running Rough With Tapping Noise
2005 F-150 4.6L 2WD, 268,000 miles....
Recently I got a flashing 'Check Engine' light and a rough running engine (along with a tapping noise) when I was passing someone (and pulling a trailer). I retrieved codes 300, 304, & 305. I can't swear to it, but I think the tapping noise started at the same time as the coil problem.
I replaced coils #4 & #5 (later that same day) and the engine smoothed back out but the tapping noise is still hanging around. The noise speeds up at higher RPM's and doesn't go away if I shift into neutral. Oil level and pressure are fine and I only use Motorcraft 5W-20 and Motorcraft filters (and change the oil every 5K miles).
Not sure if this is relevant: I think I have bad valve guide seals (blue smoke after long idles) but no other problems that I am aware of. It sort of sounds like a lifter, but is there a good way to pin it down? Is it possible that this tapping is related to the bad coils?
Ford :: Service Engine Soon Light Came On / Idle Seems A Little Rough When Stopped At A Light
2000 Ford ZX2 2.0 ....I've got approx. 79,350 miles on this car. I'm the original owner. The "Service Engine Soon" light came on. I took the the car to an Advanced Auto Parts store, they hooked up their handheld computer to the car and told me "it might be an oxygen sensor or poor fuel octane", he suggested adding an octane booster and see if the light stays off. I did that,but two days later it came back on, the idle seems a little ruff when stopped at a light.
View 5 RepliesTouareg :: 2004 VW - Check Engine Light Is On / Running Rough At Low RPMs
I have a 2004 VW Touareg with 116K miles. Yesterday the check engine light came on and she is running very rough at low RPMs. The manual tells me that there is either a problem with the exahust manifold or an O2 sensor is bad. It feels as if she is struggling for air. When you start the vehicle the check engine light flashes then stays on in the cluster. What can I expect when I take it in to the dealership? Is there anything I can check before I take it in?
View 4 RepliesFord - Escape :: 2004 - Rough Idle At A Stoplight Like Going To Stall
Last week I had the plugs, coils, valve cover gasket and fuel filter done my 2004 Ford Escape when the engine started misfiring and today it started to idle rough at a stoplight and it seemed like it was going to stall but didn't. I had it sit for about an hour and a half and the it did want to turn over like the battery did have enough cold crank to it but it did after a couple of times. It has come and gone for the last couple of hours. No warning lights are one either. It seems pretty close to what it was doing when it was misfiring. What it may be?
View 10 RepliesFord F-150 - 1997-2003 :: 1999 - Service Engine Soon Light On Sometimes At High Rpm Or Rough Erratic Idle
My trucks symptoms include a illuminated service engine soon light, sometimes a high rpm idle, and sometimes a rough erratic idle. When a scan was done it indicated the oxygen sensor was defective. The issue is: which specific one (there are multiple oxygen sensors) or how could I check or determine the faulty one for sure. I am trying to economize and replace only the bad one myself if possible. I own a good multimeter, can it determine the bad one? 1999 F-150 4.2 Litre V6 oxygen sensor dillemna....
View 7 RepliesElantra XD (2001-06) :: Rough Idle - No Check Or Service Engine Light
I just purchased my first foreign car ever. it is a 2002 Elantra it idles very rough changed plugs using NGK and wires new fuel filter and ran 2 full tanks of high grade fuel with STP fuel injector cleaner. but had no effect on idle also have no check or service engine light. What to check next?
View 3 RepliesFord F-150 (2004-2008) :: 2006 - Running Rough When Warm
History: Truck was running okay but acted like a coil was bad when under load. I changed out all the plugs with Motorcraft and put on Summit racing COPs.
After the plug and cop change the truck will run rough after it is warmed up. I changed back to the old COPs and it runs the same.
First I replaced the MAF sensor after finding many posts on here about it. No change.
I read a bunch of posts on oil causing the problem so I used 10-30w and nothing changed.
I searched for a vacuum leak with carb cleaner and couldn't find one. I removed, cleaned and reinstalled the throttle body.
When I did the plug change I disconnected the PCM without disconnecting the battery. Would this cause this type of problem?
I think this is about all the stuff I found to try in the threads that came up through searching.
Ford F-150 (2004-2008) :: 4.6L Running Rough When Accelerate Quickly
My f-150 has an intermittent rough idle and consistently runs rough when you accelerate quickly. Vehicle is not throwing any codes?
View 3 RepliesDeville :: 97 Cadillac Idling Rough - Service Engine Light Blinks On / Off Continuously
My car is idling rough and the Service Engine light blinks on/off continuously. I ran the codes and they are P0301, P0401 and P1258. What this could be? I changed the plugs, wires and ignition coils about a year ago. Catalytic converter was replaced around the same time but the O2 sensors hasn't been changed. Could that be the cause?
View 1 RepliesFord F-150 (2004-2008) :: 2006 XLT Started Running Rough Out Of Nowhere Near Idle
I have a Ford F150 XLT. I have 67000 miles on it and the other night it just started running rough out of no where near idle. Once you got over 20mph the rough running would go away. I took it to get an engine change and engine flushed but it came back. It doesnt always run rough near idle or below 20mph. The Ford dealer says my engine has only 22 psi oil pressure near hot idle and cant engage the VCT phazers and they want to replace the whole engine.
View 1 RepliesFord F-150 (2004-2008) :: 2005 - Running Rough And Misfiring Quite Frequently
My 05 was running rough and misfiring quite frequently. After much deliberation, I took it in for a diagnostic hookup. The dealer said my driver side cat was clogged. Lucky for me, I was just under the warranty period(79673 miles). I have had it replaced and I can feel a noticeable difference in the way it runs. Could a clogged cat have made it run that poorly or am is it just in my head that it is running alot better?
View 7 RepliesFord F-150 (2004-2008) :: Running Rough And Skipping After Plug Change?
I just completed a successful second spark plug change, using Motorcraft SP515 plugs just like last time. After reconnecting battery and starting engine, it ran poorly throughout a short road test. Felt like it was skipping. Checked under the hood and found that the #2 fuel injector was disconnected, so I reconnected the injector.
I took another short road trip and it still ran poorly as if skipping. So, this time I disconnected the battery for several minutes while removing the #2 plug thinking I may possibly have fouled the plug by the injector not being connected. I also checked all of the other injector and coil connections. Reconnected battery and took another short trip. It still runs poorly. No codes yet.
Ford F-150 (2004-2008) :: 2007 - Motor Start Running Rough At Low RPM
I have 07 sscrew with 5.4. 93,000 miles. At start up truck runs perfect. After 20-30 minutes of running motor will start to start running rough at low rpm. Diesel sound. I can rev up and motor clears up and idles fine. Should I replace VCT solenoids? Or phasers? Or both at one time??
View 14 RepliesFord F-150 (2004-2008) :: Misfire / Running Rough And Knocks Like A Diesel
I just bought a 2007 F150 XLT with a Triton 5.4 with 80,000 miles on it. My problem is this, the engine seems to run ok ( a bit rough) until it gets up to running temp and I have driven about 10- 20 miles then most of the time, it starts to act up.
When I am driving it is fine, but when I slow down and come to an idle about 500rpms, it sometimes runs very rough, sounds like a diesel and shakes violently. It feels like it is doing damage. Sometimes it stalls. If I rev it back up immediately it will smooth out.
In speaking to some friends they've suggested things from plugged oil channels, (affecting the cam phasers? All the way to it needing new chains, phasers and guides. I don't want to spend a ton of money doing an improper service repair only to have the issue show up later . But there seems to be a lot of different answers to the same problem. Is the dealer going to be able to diagnose something like this fairly well? Or should I try to narrow it down a bit first?
Ford F-150 (2004-2008) :: 2005 - Running Rough - Jumped Timing?
I changed the timing chain, phasers, tensioners, guides, and cam sensors and solenoids about 30k miles ago. Truck now has 170k miles. This past weekend engine started running so rough, it had the whole front end shaking. Threw 8 codes..1 bank..lean, bank 2 rich, timing retarded, cylinder G and F misfire, and more codes. It seems to have jumped timing pretty bad.
View 1 RepliesFord F-150 (2004-2008) :: Running Rough / Ticking Noise / Low Mileage?
the F150 of my brother has the follow diseases:rough running ticking noises, low mileage per gallone, blue smoke out of exhaust after start, i have ordered the cam phaser, hope, that will be the reason. But today, my brother means, i have to do a test drive, because the truck has no power. and really, feels like missing of one or two cylinders. Very bad performance. Is it possible, that the reason are the phasers?
View 4 RepliesFord F-150 (2004-2008) :: 2003 - Crank But Would Not Start / Service Engine Soon Illuminated On Dash
Wifes F150 was turned off while she went shopping when she came out it would not start would crank but would not run. Got it home hooked up my scanner, had no codes, but the Service Engine Soon was illuminated on dash. Just wondering if this has anything to do with the PCM. Has a 4.6L engine, 2X4.
View 5 Replies