Ford F-150 (2004-2008) :: Jerks While Reacceleration Around 50 Mph?
May 19, 2012
Only happens with following sequence:
Accelerate up to 50's mph, let off accelerator, then re-accelerate..especially on an incline. Get a rough jerk motion until I either let off the accelerator or accelerate hard through it. It doesn't seem to occur when the Overdrive is on. No codes are thrown.
Been to two shops, one a general shop to diag the engine and to tranny shop but neither was sure. I guess I'll have to go to the dealer but I was curious what others think of the problem.
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Truck is 08' with 5.4, 3.55 gears, auto trans. 84k miles. Recently purchased from the TSA fleet trucks, so I have no clue what PM procedures were done prior to me getting it.
I noticed the following: when I get the truck into OD and then slowly decelerate (meaning I let it coast and im not braking) to about 40mph then get on the gas (normal acceleration) the truck bucks hard almost like when your spinning wheels on snow or ice and put the truck in 4wd and the front rear locks. or a limited slip rear that catches when one wheel is spinning.
if I accelerate hard the truck pushes thru it and doesn't buck as bad. I have searched this out and there are several threads about it that describe just about exactly what im talking about, the following have been brought up as possible problems:
1) bad spark plug/s and or coil/s
this seems to be the most common answer to the possible problem.
2)broke valve spring
3) bad torque convertor
So at 84k miles im thinking replacing the spark plugs would be fine to do as a PM. So coils.............should I just go ahead and replace them as well? I found them (motorcraft). does that seem right?
As far as spark plugs, I have already read the horror stories on the 04-08's breaking the plug in the head. I have also read that before 10/07 was the trucks that had the issue. my build date is 02/08. am I good to go with normal removal of the plugs? the best method I have read for removing them is spray carb cleaner down the hole and let it soak overnight and then the next day drive the truck get it nice and hot and remove them right after you park it,,,,
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It just started doing it the only way I can seem to figure out how to explain it is at about 50 to 60 under slight acceleration or uphill it bucks or jerks like you have a trailer jerking. No check engine light this thing is driving me nuts... 2004 f150 5.4 ...
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2004 F150 XLT 4X4, 5.4, 142,000 miles... Plugs had been changed at around 75,000 miles... Shell gas used 99% of the time.
Shudders and jerks going up inclines (big or small). Bad gas is being reported at all the local stations...Started using Sea foam and Lucas fuel line cleaner/ethanol treatment. After three tanks of that, I ran tank down till low fuel came on, kept driving, and no more shudders/jerks and ran great while low fuel light was on.
OK...decided to fill tank with Non ethanol gas this time (not Shell gas), added Sea foam and Lucas fuel line cleaner, and shakes, shudders and jerks all the time now.
Before no check engine lights came on but for once when I romped on the pedal once to blow it out, but it went off once I let off. Today going to work, entering traffic, engine light came on, blinked and stayed on. Truck now shudders and jerks all the time when I give it gas, and can only drive like Paw Paw to keep if from doing that.
Local shop ran test and #7 cylinder is not firing and two lean fuel notices. It will be Tuesday before they can check and if needed, replace coil on #7 cylinder.
I'm thinking of installing a new Fuel Pump Control Modulator as per a thread I read here, but only after they check/replace the coil. AND ALSO...turning the OD off did stop the shutters/jerks.
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I have a 2004 f150 fx4. My truck starts to jerk around 50-55 mph at 1100 rpms and again at 80 mph.
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I have a 2006 F150 4x4. When the engine an transmission is cold it jerks/ Bogs when it shifts. After it warms up it doesn't jerk to bad sometimes but you can still notice it. Also when it shifts the RPM's drop low causing it to bog and jerk. RPM's will go from 1600 to about 800 when it shifts. It is and auto transmission. Today I wanted to try something so I pressed the button to turn the over drive off. Well it shift real good with the OD Off. Seem like with the OD Off it keeps the RPM's up a little higher so it doesn't bog and jerk. I put an Edge Programmer on it, but that didn't work. Still does the same thing with or without the programmer. I changed all my spark plug and coil packs. Truck goes great until it shifts.
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Its a 2007 f150 v6. has 55,000 miles. just got her new tires for Christmas. the truck has doing this for awhile. when you use the brakes the pedal pulsates and the truck jerks back and forth. Feels like bent rotor or something. I've been doing it about a year keeps getting worse. Last year I had the rotors turned and put new pads on got a little better. But not for long continued to get worse again. So I just bought new rotors and pads and still sucks. I thought it could be a bent rim so I just rotated the tires and still no better. Where should i go from here? calipers? something in the front end loose?
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I have a 2004 Ford Escape that has never caused any issues...except now. I have recently noticed that occasionally when I have my foot on the brake, my car makes a forward jerking motion. It never slips out of gear. It just jerks forward. It's not all the time either. Also this morning, my husband went to start the car and while it was still in park, he said it did the same thing. Like I said, the car never shifts out of gear and I never hear grinding gears when I do shift.
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I have a 2004 F250 early build over 260K miles on it. After taking a trip out west Texas and back I noticed my truck starts to jerk a lot around the 50 to 60 mph range under moderate throttle. Getting a contribution code on #6. FICM voltage stays over 47v during KOEO and startup. Took an inferred thermometer and even after truck is at operating temp #6 is reading about 3 degrees cooler then the others.
When cranking the engine everything sounds smooth but startups are getting harder. Usually let it idle for a few minutes before taking off on cold start but I am having to let it warm up longer before I can get any power. Did a bubble test and passed and oil level hasnt changed. Fuel mileage has been sucking bad also. Safe to assume the injector is shot and needs replaced? Use Delo 5W-40 Syn every change with motorcraft filters.
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Bought my first Diesel few weeks ago and I am trying to figure out if something is normal. Its a 2004 F350 and the truck seems to jerk a little bit when I come to a stop and when I hit on the gas. Feels like a tug every time into gear.
I would like to say its first to second but it cant be because its basically only happens when I press on the gas and start rolling, unless I am going into second immediately thats not it. I know less than dick about this truck?
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When I slow down to stop my 2008 Sonata it jerks. It is an intermittent issue. The car has 95,000 miles and when I called the dealer I was told they would start with changing the transmission fluid and go from there. I read on some other posts of this same type of issue being fixed by installing the latest software for the transmission, but this was related to 2009 & 2010 Sonatas. Is it possible that installing some new software would work on my 2008?
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Purchased this car new. 2008 GLS w/ V6 2.7L engine. Wife's car, so I rarely drive it. She's complained for a month about an intermittent issue with the jar "jerking", usually during slow speeds.
I felt it for the first time myself. Was halfway through a pretty tight curve at around 20 MPH, starting to slowly accelerate when I felt a definitive lurch. might have been momentary loss of acceleration, or transmission. Not sure which. No CEL thrown.
I did see another thread mentioning a 2007 with a similar issue, but that person had codes thrown that pointed to a Throttle position sensor and a need to reflash a transmission. Think I'm seeing the same situation, or would this be different ? Absent any CEL, I'm sure the dealer will not be able to find it....
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2008 GS460. 100K miles
I have noticed when I accelerate on a entrance ramp to the highway I notice the RPM meter jerks a little like it's trying to suck for gas or something else. I can feel it in the car too. This is the only time I have noticed this. I have replaced the spark plugs about 5K miles ago.
I did bring it into the dealership a few months ago to get the fuel pump replaced as I noticed a hissing noise under the drivers side read door. They said fuel pumps rarely go bad on the Lexus. The mechanic did some fuel pressure tests and said everything looks good. He also said noise is the return line back to the pump.
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It's an 04 F350 6.8L This past winter when it was cold I would start it up and it would rock forward and bounce back as is you shifted in to park while rolling. Now that it's warmed up it won't jerk forward but the whole body shakes only at start up. As much as I like the idea of of the raw torque being so powerful the truck twists with power I don't think that's the case.
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I experience a jump or jerk when rolling towards e.g. a stop sign or traffic light, or even in stop-and-go traffic and the transmission shifts down into first gear. The jerk only happens when I stop slowly. If I break fairly hard, this problem does not appear. It even jumps/jerks when I roll down my driveway, breaking slightly. In some cases, I fear that I'll leave the gearbox on the street.
This, of course, does not happen every time, but frequently enough that I asked my VW dealer to take a look at the problem. They changed my spark plugs and said that this may have been the reason
Can not quite make this connection, and of course on my way home the same jump/jerks happen, as on my way to work this morning. I want to take my car back to the dealer, but hopefully with some more insight, since they appear to be clueless.
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I have a 2004 Hyundai Elantra with 130000+ mi on it. The current engine has 96000+ mi; the original was replaced because the previous owner allowed it to overheat, blew a gasket, and apparently warped the engine itself.
I have owned this car for about 6 weeks now. The car was driven roughly 160 mi from where it was purchased to my residence; no trouble on that trip. However, within the first few weeks of owning it, the car started making a squealing noise when I turned the steering wheel. I took the car to a mechanic and had the belts adjusted. This eliminated the squealing, but I was also told that the CV boot needed to be replaced (they asked if I had been hearing a clicking noise when turning, which I had but had thought nothing of), so I also had that repair done. Problem solved. Car seemed to be running fine.
Okay, on to the current problem. Something else I had started to notice, before I had the belts adjusted, was that it seemed to hesitate a little when going up hills, and sometimes when accelerating. It was a small thing, and I attributed it to my driving style (which probably isn't the best) and the fact that my area is very hilly and the car might be having a harder time with that. Well, this problem has gotten worse; I can definitely feel the car jerking, especially when accelerating (very noticeable when going uphill). The problem also seems to be worse at lower speeds, but I'm not entirely sure that I've nailed that down.
One thing I noticed is that it seemed to become much more noticeable after the last time I gassed up the car. It seems like it's getting worse as the fuel is used up, but that's probably just a consequence of using up fuel as I drive and I'm just looking for connections where there aren't any.
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When I'm driving at Highway speeds, if I let go of the accelerator to coast and then reapply the accelerator, I get a jerking, bucking sensation. It's only at high speeds over 60 mph or so. I'm only coasting for a second or two, not long at all. Otherwise the transmission works well.
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I have a 2004; 4cyl Sonata, that jerks when I accelerate from a stop light or when I step on the gas, it jerks and sputters while passing another vehicle, then it gains speed?
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Will mirrors from a 2010 FX4 fit on a 2008 60th anniversary?
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I am looking to swap 2007 vin 5 to 2008 vin V 5.4. Just wondering what would need to be changer? Would the ECM need to be replaced? I believe the vin V is flex fuel.
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I have a Ranger and when I'm driving on the tolls where the speed is 75 mph, my truck will start to jerk like it is having problems changing gears. The truck will shudder almost and I have to slow down so that it can stay in a lower gear. I keep my overdrive for when I drive on the highway and I'm afraid that the problem lies in the gears or clutch.
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