Ford F-150 (2004-2008) :: Sputters - Misses During Hard Downshift?
Feb 13, 2011
Strange condition? If I kick it down hard into passing gear (or downshift hard into any gear for that matter), it pukes and sputters for a few seconds before clearing up and coming to life. No issues with normal driving, or dead stop hard acceleration, just on the downshift.
I’ve got a Magnaflow cat back on there and am wondering if opening up the exhaust and reducing the back pressure is screwing with the ECU a little? Is this just the nature of the stock Ford tune and it wasn’t as pronounced with the stock exhaust as it is now? Trucks an '06 FX4 5.4L and only has 70,000km on it.
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I've recently had a small issue with my truck missing under hard load. If you're going around 40 MPH and push it down like merging it will kick back and forth and sputter and then start hitting fine again after a few seconds and move on. Possibly bad sparkplugs and/or wires?
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My truck's been having an occasional hard start, meaning the engine cranks strong but it fails to catch and then sputters. The 2nd start attempt usually fires up with no issues and then runs perfectly otherwise.
MPG's haven't changed, fuel filter was changed 15K ago. Air filter is clean. Plugs were changed about 10K ago. I always use Shell/Chevron gas. MAF sensor looked clean when I took it out so I didn't do anything to it.
This is starting to happen more frequently, maybe once every few weeks and I get a feeling it's the start of something. I've found myself waiting a few seconds for the fuel pressure gauge to come up before turning the key to start reliably. In the past, I could simply flick the key and it fires up the first time.
I see posts talking about the fuel pump module above the spare tire. What are symptoms of that going bad? Any pending codes that might be stored?
I'm about to get myself a scanner since I need one sooner or later. Which specific PID's to check while debugging this?
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I was getting a misfire in #4 cyl. Couldn't afford to change all my plugs, so I replaced the one that was missing. Two weeks went by, truck ran fine, then it started missing really hard (same cyl #4). Thought my COP was bad, so replaced that and the boot.
Drove my truck to work last night, seemed to run fine, but this morning, it started to sputter again around 45-55. Plug in my OBD2 and it wasn't throwing any codes, seemed to idle just fine.
When I got home I put it park and revved the engine a little bit. Got it around 2500 rpm and it sounded like I have a air leak in a way. What do at this point. It is a 2007 F150 5.4 triton with 104xxx on it.
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Intermittent starting issue in these things? Seems to be getting more common for me this winter. Turn the key, it turns over, and then I let go of the key and she doesn't light. Then when I try again, it's like the engine is flooded. I have to give it gas to start, which I know is a no-no in fuel injected vehicles. Other than that, it's fine. No sputters, no hiccups, runs strong, good mpg, etc. But I'm getting annoyed....
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I have a 2004 Pontiac Montana minivan. I get a hard downshift from 2nd to 1st only when the engine is cold - especially noticeable in cold weather. After a mile or so of driving (or a few minutes of idling) is shifts fine. All upshifts are fine all the time. The tranny fluid level is fine and is in good condition. What it could be?
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Ive got a 2006 5.4, Fx4, screw, with 90,000 miles.
Recently it shifts perfect except when it down shifts from 4th gear to 3rd gear. If i mash the pedal it is fine, its only when it just a slight acceleration and it is a easy down shift that causes the problem. What it does is almost like it wont lock into the gear, it bucks lightly but where I can feel it still. Im going 40 to 60 mph when this happens most of the time.
I am not sure if there is a sensor of something else that would be the cause this of is maybe my Transmission is just shooting craps. Also, i have a SCT tuner that i havent hooked up to the truck yet, but do you think if i plugged it in and turned up the shift firmness if it would work.
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I got my truck to throw some codes. As many of you know I have been having an issue where when I stomp my truck to the floor it sputters and hesitates. Some days its worse then others. It only happens under a load, and it generally doesn't last to long, however today it did it a whole bunch and lasted for a good bit any time I got on it hard. My engine light begin to flash, and there was a smell of exhaust. I went to Autozone quickly as possible. The guy read the code, and this time no lean codes, just a "P0430" which the code reader said was O2 Sensor Bank 2. It also had a pending code, which was "multiple cylinder misfire detected". So my question is can an O2 sensor cause this? Could my CAT on that side be bad?
If that is all it is, is a bad cat or O2 sensor then I will be very happy... Like I said I can sit in my driveway in park all day long, and rev outta my truck. It will never misfire or hesitate at all. Soon is I put it in gear and am going down the road and punch it sometimes it pop and sputter.
Another cool thing is some how their code reader was able to read my ABS light, and I found out that this whole time I have had a bad ABS Speed Sensor in the rear end. That is a plus as well.
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I've recently replaced the timing chains on my sons 04 F-150 5.4. Now I'm getting a code PO174. I've changed 2 coil packs, fuel filter, MAF sensor and cleaned all the connections. Fuel filter had what looked like brown fuel coming out of the in line of the filter. I'm stressed out now, the truck does not even have enough power to drive up the driveway. Backfires, spits and sputters, has rough idle.
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I have had a 2005 f150 v6 5 speed for a little over two years. Got about 153k on it. Last night was sitting in a parking lot idling about 20-25 minutes, went to leave and she started sputtering hard, lost all power and died. Started back up, idled fine, as soon as i put it in gear same thing then the check engine light came on.
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2000 5.4 4x4. 104k miles. Extended cab. Heres the issue, when you're at that spot on a slight upgrade and the tranny should down shift out of overdrive it will downshift kinda hard. Sometimes it does this and sometimes it wont. Its driving me nuts. I thought maybe change the fluid and filter and see what happens, but a tranny guy that I don't know from the other guy said dont waste your money its more than likely a broken spring behind a piston. I put a new motor in this truck about 10k ago so I can wrench. It did this before the motor swap too.
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I have an 2011 6.7 that has a h&s tuner. Lately my transmission seems to be confused about what gear it should be in when I'm driving about 45mph. It will sometime downshift hard. I have a early build 2011 and heard that it could be a solenoid problem with the transmission.
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I have a 99 Ranger, 3.0 xlt 2WD Automatic 5r55e(???) tranny (i know its the 5). I have the o/d off light flashing. It comes on when fluid gets to op temp. When on it shifts hard into 2nd and hard when it downshifts. No slipping. I have had the truck in the tranny shop for 3 weeks, owner said he re built valve body gasket (didnt work) tried 3 diff used tranny's (didn't work) or so he says. He said it needs to be rebuilt.
I have searched up and down for what it could be, there is so much out there, it only confused me more. If i have to rebuild i will, i think the tranny shop was pulling my leg (for more reasons than mentioned). I have a check engine light on nothing to do with tranny...there is a tranny code, he would not tell me but i will have it checked. Been told could be throttle position sensorl, speed sensor cracked case and a million other things. I have some mechanical abilities, (not too much w/ tranny's) but i can change a few simple sensors.
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I have an 2011 6.7 that has a h&s tuner. Lately my transmission seems to be confused about what gear it should be in when I'm driving about 45mph. It will sometime downshift hard. I have a early build 2011 and heard that it could be a solenoid problem with the transmission.
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Trying to do some trouble shooting on my own as I'm tired of spending $$ with my local "diesel" garage and getting ripped off. To start with, here's my symptoms:
1. Hard (very hard) to start in the morning. Gets harder every morning. Took me 10 minutes of cranking yesterday morning
2. Once it does start it's very loud, seems to run on just a couple of cylinders and lot's of white smoke
3. After about 10 minutes it's able to get down the road but then at about 2300 RPM and above it sputters, low power, and LOTS of white smoke again.
4. Lots of diesel smell, almost like it has a leak but no visible signs of leaking anywhere.
I've done a lot of research and seems to be leading me towards injector problem or in that general vicinity. However, my first step is to try to narrow it down a little more before I start throwing parts at it. So, first question is: what's my best option for downloading codes? I guess I need one that is CAN capable but seems like most of these or either a few thousand $$ or I have to go to something like a Scanguage or Bullydog. I've thought about putting a tuner on but I guess at that point I'm committing to keeping the truck for a few more years.
So, just initially looking for info on diagnostics equipment and/or test that will eliminate the issue(s). Second, need inputs on possible problems based on symptoms listed above that would be great too. Had EGR delete done a year or so ago.
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I have a 2004 f250 5.4l w 4r100 and it seams to loose its gear or down shift only when i take a hard right turn. I took it to a trans shop and it shows no codes and at this point I am very confused...
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I have posted on here before about this very issue, thinking it was primarily the transmission. In additon to a hard upshift/downshift (it almost feels like getting a little "kick" from behind while in the truck) I was getting a flashing O/d light, etc.
Since then the tranny died. No shifting at all. I was able to find a usable replacement from another truck (the guy sideswipped a pole, and decided he was done with it, as he tweaked the front frame slightly), which was working fine (before the accident).
I swapped the units out (trans and T/C), and the truck has life again! No flashing O/D light, nice power, and good gas mileage (I went from pre-failure 15mpg to 20mpg now).
However, the kick has never gone away.
So, what next? How much "play" should there be in the driveshaft when the vehicle is parked? I can move it a little bit. Should I consider servicing/replacing the U-joints? Or should I now suspect the rear diff to be the culprit, and how can I best determine this?
Also, can you switch out one rear end for another? If you can, is there any any paricular one that is better to use for towing/hauling as opposed to, let's say, off-roading or city driving?
As for the vehicle in question, it's a 1995 Ranger XLT extended cab with a 3.0V6 and auto trans. I believe it's supposed to have a limited-slip diff, but how do I determine this?
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I put some bfg at's on my '16 f250 6.2 today, 285/70r17 from 245/75r17. Has went to a larger tire and had funny downshifts? I had two hard down shifts on the way home from tire shop that I have never had before. I'm hoping this will go away once the computer relearns. Should I disconnect the battery or anything or just drive it and let it learn? I'm a little disappointed, the tires still look tiny, and checking clearances at liners and radius arms, I could have cleared a lot more tire easily. They sure looked bigger on dads '04. These will do me for a year or so until I can upgrade wheels, tires and suspension.
Before
After
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2015 F-350 diesel purchased Sept 2104. When towing my 16,000 lb 5th wheel the 6 to 5 downshift seems to have gotten much harsher in the last few months. About 10,000 miles on the truck, much of it towing. Is this an indication of a developing problem?
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Starts good cold and hot. Taking off like a grandpa on an evening drive don't notice a thing. Only codes that keep coming up are 2614 and 2617 which are cmp and ckp open curcuit codes and a software incompatibility code for FICM which is due to the updated software in the fresh FICM I installed. HPO pressures are good, has boost, idles smooth, revs nice when in park. New injectors (cause it was running rough especially cold before) and CMP and CKP (because of the above codes and didn't change)and ICP and IPR (last 2 installed because of HPO codes that are gone now with the IPR and ICP). Fuel pressure is 65psi (updated spring). When you step on it while driving it sputters and bucks like it's out of fuel, let off the throttle a bit and it purrs like a kitten. I'm a little stumped. I think it puffs a little white/blue smoke while it bucks.. not much tho. and it comes in little puffs. Took off filler cap and there is almost no blow by.
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2001 F350 7.3 ... Below 35 degrees, truck is hard to start. Cranks for a while, sputters, dies. Repeat a couple times, finally starts running rough, surging and loping for 10-15 seconds before it settles down and runs smoothly. Recently had all glow plugs replaced. Next cold start didn't show much improvement (not as bad as sometimes, but wasn't very cold either).
Surfing here and other forums, I see suggestions about letting glow plugs heat longer after WTS light goes out. Some suggest as long as 60 seconds. In the past, I have tried waiting a little while longer after light goes out, or turning key off/on and letting it cycle again. But I've never really timed how long I was waiting.
We're having a warm spell right now, so I can't do much testing. But yesterday morning was about 30. I timed the WTS light and it went out after 10 seconds. I waited another 20 seconds.. about 30 seconds total. Starting seemed a little better than usual, and there was about 1 second of roughness before it settled down.
I need to do more cold weather testing to be sure, but it does seem like it might be better to wait longer than I have been.
On the other end of the scale, I saw a comment that glow plug cycle is dependent on oil temp, and they don't come on at all if oil temp is above 40. Is this correct? If so, is there any good reason to wait to start in warm weather? I'm usually pretty diligent about waiting for the light regardless of weather, but the truck doesn't seem to object if I get impatient and start it sooner in warm weather. If the glow plugs aren't even on, why wait?
Should I just totally ignore the light, and wait for some interval (or not at all) based on a semi-educated guess about how much glow plug time might be necessary for the current temp?
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