Ford F-150 - 1997-2003 :: 2002 - Bucking Whilst Accelerating?
Mar 15, 2015
I have 2002 4.2L F150 w/ Manual Transmission. The problem I have started about a week ago. I noticed it started to idle very rough and at times felt like it would almost stall if i didn't keep giving it some gas. Then a few days later it started to jerk/and buck intermittently while accelerating. I changed out the plugs and wires. My coil pack was replaced a year ago but was still under warranty so i installed a new one just in case. I cleaned and inspected the EGR valve and replaced the TPS. The rough idling seems to have cleared up but the jerking/and bucking still remains.
When the engine is cold the truck runs fine, and then as the engine starts to warm up it will jerk and buck while accelerating at any speed. Once the engine has reached its optimal temperature the jerking/bucking goes away and it runs smooth as silk. I can drive it for for a few hours with no issues whatsoever. As soon as the engine cools, the cycle starts all over again. I figured maybe the intake gaskets were on their last legs and when they heat up they seal tighter causing the engine to smooth out.
So I replaced the upper and lower plenum gaskets today and cleaned everything up. It still did not fix the problem.
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I have a 2000 5.4 4x2 with about 118k. the pinion seal was leaking. I replaced the seal and added proper amount of 75/140 diff fluid as listed on the tag. I marked the pinion nut, flange and housing, so I could count the number of turns it took to remove nut. I put back the same but now I have a whine at low speed on deceleration. under normal throttle and at higher speeds it sounds just fine. Its just on deceleration and at 5mph or less. The sound was not there before I did the new seal.
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I have a 2002 f150 with the 5.4. Its got a rough idle and a bit hesitant on acceleration. Im wanting to replace the coils and plugs but what brand of coils should I use?
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About 4-5 weeks ago my 2002 F-250 7.3 just died with no warning after coming off the highway and since then it hesitates/dies when hitting a bump or while applying pedal with the A/C on. The code that keeps popping up is the P0344 "CPS" and the code for back pressure sensor... I have replaced the CPS twice "making sure the 1st one was not bad", the back pressure sensor and the tube the goes the manifold, and fuel filter and still having problems... I didn't know if there could be a fuel pump issue or something else?
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My 1999 f150 is having issues of bucking while going down the road and it only happen on a hot day. It's like someone is turning the key off then back on.It's only for a split second. I'm having trouble determining if this truck has the fpdm or not. and if this may be the issue. Fuel Pump Driver Module ?
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I have an 02 F150 super cab Fx4 with a 5.4 engine. Earlier this week my wife pulled up to a stop light and the truck began to buck and jerk while moving. She pulled over and we had it towed back to the house. I pulled into the garage and something felt off, my first thought was rear diff clutches(the truck has 92k). I backed it straight out of the garage the next morning and it was popping and binding while backing up, it would move a little then act like it was up against a curb, then hit the gas, it would pop and move a little more. I popped the rear cover off the diff and the fluid was clean, and I did not see any metal shavings in it. Next I removed the rear brake disc to check if the parking brake shoes grenaded, they are fine.
Right now I have the rear end on jackstands, I put the tranny in neutral and turned the driveshaft by hand in front of the diff. It will turn in one direction and then not go back the other way. Not to sound ignorant, but is that normal operation of the traction lock diff? Next thing, while turning the driveshaft by hand, there is a clicking noise coming from the transfer case area. I slid underneath and could hear it coming from the case. Is this noise normal? I have no other truck around here to compare too. I have used the search function here at the forum, I am just not finding my particular issue. The truck was not in 4wd when this happened either.
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I just bought a 2006 f150 exteneded cab w/ 5.4 V-8 and it vibrates when accelerating from a stopped position but not all the time---happens more when the wheel is turned. It definitely feels like the vib is coming from the left front side. I just got it back from the shop and the mechanic told me the vibration was stemming from the rear and that he exhchanged the fluid and added anti-friction additiver but that he expects the problem to continue.
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I have a 98 with the 4.2.The troubles started with popping a little through the exhaust ,bogging down and bucking,rough idle and had the two codes together that deal with having bad intake gaskets don't remember the codes offhand.
I also noticed every plug in the truck was wet and black however it didn't appear oil wet.I have changed the fuel filter,spark plugs,lower intake gaskets,plenum gasket ,injector o rings,checked injector ohms all were 16.5,new EGR gaskets,all bolts are torqued to specs
Now I have a no run condition, it will crank but not run. I heard a pop in the engine one time. I cranked till the battery went dead.I also noticed as I was calling it a day last night the radiator reservoir was empty. I don't know if somehow I got a hydro lock even though I put new intake gaskets in it or i have some other issue like timing or something. I don't know where to look next....
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I just purchased a 2000 f150 4x4 with a 5.4 automatic... it ran great for a few days and even ran fine on the 100+mile trip home from the previous owners house. All the sudden it shut down on the highway today. I could barely get it started again and when it did start, it ran like hell, bucking and jolting, almost like a really bad misfire. I could also smell trans fluid being heated up, so I let it sit awhile and then it fired right up. It drove for about a half mile and began to act up again. I threw it in second gear to limp it home which it died several times on. Each time I'd let it sit for like 15 minutes with the negative battery cable off. It fires right up after that but the problem quickly returns. Also the overdrive button doesn't work, and the trans control switch fuse (spot 29) blows repeatedly. Also the power door locks do not work.
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I bought a 2011 Ecoboost F150 last week. I test drove the crap out of it, and was pleased with it. Go figure, get it home and within a few days, when I put a little foot into it to respond to a call (vol. firefighter) it does the crazy buck me around bit. I do some looking around here and get a little paranoid about the water ingestion thing. It did throw make the CEL flash for 30 secs or so. Then I dig some more and see these things eat spark plugs. I am sitting at 86k miles on it, so I figure, let's try the simple first.
I go pick up some Motocraft plugs and within two mediocre innings of listening to the Angels play, I am finished. I take it out for a test drive, and oh my goodness... the difference. I couldn't get it to buck around or anything. I got on the highway and really got on it, to test and see... no problems whatsoever. Checking the gap on the plugs that came off, they were all between .045 and .050. Moral of my first post.... don't underestimate the importance of the basic maintenance items.
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My 2007 elantra is starting to pop out of 4th gear whilst accelerating. Is there a fix for this?
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97 Aero. Just recently experienced this weird issue. Had the AC on for a warm day and heading down the freeway at 70mph. The AC is kicking out some nice cool air. Noticed that when the van was heading up a slight grade, the air speed coming out of the vent would slowly diminish until no air came through the vents at all.
As soon as the van leveled out or started heading downhill, the vent air speed would pick back up and blow normally. This happened repeatedly. Is this a blower issue? Vent door issue? Something else? Since the van was traveling at speed, I could not tell is the blower was still blowing when I was experiencing no air out of the vents.
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Ive got a 2000 4x4 F-150 with a 4.6 and a 4r70w. The transmission and transfercase were replaced by the P.O aprox 2,000 miles before i bought it..
i was driving it today, and while accelerating it missed a shift into 3rd, then nothing no forward or reverse, i sat and messed with the gears for a while then suddenly it shifted into 1st now it drives with a slight resistance, revs up to about 3K before shifting and shifts HARD up and down, and i cannot get over 40 mph its at about 2800 rpms and feels like im hitting a rev limiter wont shift again and wont accelerate anymore..
When at that speed I hit the OD off and it downshifts so i think i still have od?
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2002 F-150 4.2L. About a year ago, it threw the P0171 and 0174 codes up. After replacing all the simple stuff, I bit the bullet and replaced the lower intake gasket as well as the upper intake gaskets. Buttoned it all up, reset the codes and we were back in business. No issues, truck ran good. About 6-8 months later, the check engine light came back on, I check it and it was that pesky set of codes again, 0171 and 0174.
It still ran fine, but the codes were there, so I just drove it for a while (it's a company truck that doesn't get driven that much).
A couple of weeks ago while driving it, it acted very sluggish. You could mash the accelerator and it would just very slowly run up the speed. It never hesitated or missed, it just got very very sluggish. Checked the codes, no additional codes.
Then it began to stumble when you mashed the gas.
I put new plugs (old one's looked great, other than a huge gap), new wires, new coil pack and started it. Pushed the gas pedal, it just dies.
I look for obvious vacuum leaks and replace a couple of elbows for the PCV and it seems to run a little better. Enough so that I can drive it, but still not running right.
I ordered all the intake gaskets and new isolator bolts and spend Saturday pulling that apart. I didn't do the lower intake because the upper intake gaskets looked so good, I just don't believe this is a intake gasket problem. None the less, I installed the new gaskets on the plenum and upper intake, new isolator bolts, replaced a couple pieces of vacuum hose that looked cracked, started it back up, it ran as smooth as silk.
Convinced I had it fixed, I went for a test drive. Idling, it is as smooth as you could ask for. Pull up to a stop sign, wait, step on the gas and it chokes. Just stumbles and you can hear it almost backfiring and pushing air back through the system.
I've put new PCV, new EGR, new vacuum lines in several places, new upper intake gaskets, new plenum gaskets, new isolator bolts, and even new o-rings on the injectors, and I'm still getting the 0171 and 0174 codes.
With the diagnostics on, I can see voltage varying on all O2 sensors, so I assume they are working (none of them are reading 0 volts). It doesn't throw any other code up, other than the 0171 and 0174.
At this point I feel like I'm replaced every single thing ever mentioned in any 0171 and 0174 thread on the internet. Where to go next? 1 more point, if you very slowly push the gas, it runs fine, but any pressure on it, it bogs down and just stumbles.
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Recently, my truck has started rolling back from a stop when accelerating. There seems to be a hesitation between when I depress the throttle and the transmission engaging. It doesn't clunk, just delays. Been doing it for a few weeks, but is now getting worse. Today, the symptoms are similar but more pronounced. When driving there doesn't seem to be an issue, just moving out from a stop.
Checked the fluid idling in park, level was good, fluid looks great, was changed by a shop 6 months ago. Is my 319,000km trans on its way out?
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My trucks been doing something weird. When accelerating around 45-55 mph, a couple seconds after it shifts to 3rd, it does a weird type off shake/shudder. Feels like I hit a small bump in the road. Also when coming out of a cruise to accelerate, it will Make a very violent clunk and then speed up. I'm thinking it's a problem with my torque converter but my mechanic says transmission and my buddy says rear end lol. I dropped the pan and there was some shavings but nothing huge and it was the first time it was ever dropped. After 90k miles.
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So I have an issue with my 03 f150, Basically It clunks in various scenarios such as Accelerating also occurs take off and general breaking/slowing down but not really when stopping. December when it was cold and I was decelerating (not on the break just coasting) it feels like i was driving on the shoulder.
It does it much more in cold weather. Just had the truck out getting a little rough with it for 5 or so hours today and 0 issues with it.
I was thinking it was a slip yoke issue that I hear allot of trucks have the issue but I was at the dealership today and both guys and a mechanic sitting there were like "never had that issue on an 03 f150, might be your back end." They also stated the clunking would always occur and be more prominent when breaking which its not.
I am certain its not the transmission its not occurring with any shift point. Kind of hard to do it if its hard to reproduce in the heat.
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Noticed the other day when I was driving on the highway my truck started humming when I was accelerating past 30. From a dead stop to 30 its fine, but after it starts humming. Its only when I have my foot on the pedal. When I let off, it stops. The sound is coming from the rear/under.
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Just purchased a 2001 Ford F150 super crew lariat v8 4.6/5.4 2v OAD at 156k miles, iv had no problems with it until I drove over the pass and after 2hours of driving my truck started to jerk when I accelerate between about 40-60mph. I don't experience any other problems over 60 it runs smoothly and in town under 40 it also runs smoothly, no check engine light. The next day is still continues to make a jerking motion, which feels like from the rear.
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I have a 2001 F150XLT 4x4, V8 Triton engine with offroad package that just rolled over 119,000 miles that just started giving me problems 2 weeks ago. When I accelerate at speeds above 40 mph the truck surges or jerks ( the best way i can describe it ) sporadically unitil I get to cruising speed. If I'm cruising at say 70 mph and go to pass some one and accelerate it does it again. The transmission feels like it shifts smoothly thru all the gears and there is no whining sounds, transmission sounds normal. There is no check engine light, so I assume a diagnostic check might not show anything. Advice from guys at work say possible ignition module, coil pack, transfer case ??? It never feels like the truck wants to stall and it never feels sluggish when accelerating like there is a fuel problem.
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would a tps sensor be the reason? Is the speedometer also hopping?
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