Ford 7.3L Power Stroke (1999-2003) :: Bump / Thump Type Noise When Start From A Dead Stop
Sep 17, 2016
For probably years, I have had a bump, thump type noise when I start from a dead stop... say at a red light. I had it in my head, maybe there was that much slop in the drive train... as old truck is over 400,000 miles.
Yesterday, I rebuilt the driver's side axle, bearing,seals, new hub...the works.. I heard that noise again later... and my thoughts were, I did all that work and I'm going to find a lower/upper ball joint is bad, although I did look at them and thought they were fine during the rebuild.
Had my wife get in truck.... and swing wheel back & forth... so maybe I could see what was loose.. or making noise.
I was shocked... just something I never thought of looking at. The u-bolts holding the leaf springs were loose... the whole axle was shifting back and forth on the axle. I've never touched those bolts....
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I am pretty sure my pedal is going.. Today and last month it would just die from a dead stop push the pedal and no go, but truck idling fine. I cleaned it off a few weeks ago but now its back. push pedal in and out a few times and all is fine for a few weeks. Truck runs fine other than that. Does not throw a code, just trans light comes on because no movement I think, then it goes off as soon as i start to move along. I have a adjustable pedal assembly 2c3z-9f836-de 508.45 at white bear lake ford.
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This started yesterday. A Loud grinding type noise from the top of the engine. As soon as I touch the throttle the noise goes away. I checked the pulleys and TC and everything checks out. Sounds like it's coming from the HPOP gear area like a gear train noise. Maybe the additional oil pressure has something to do with the HPOP inside getting quiet.
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Sometimes, when I take off from a red light or stop sign, my car makes a thump. This feels as if it is under the car, not a transmission shift noise. It would seem to me that it has to do with exhaust or fuel???? I am guessing.
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I am experiencing what feels like a "bump in the rear" when initially starting from a dead stop. It feels like a car behind me tapped the bumper or that the truck "hunkers down" first, then moves. Tranny seems fine also. Once moving, there is no problem whatsoever. There atre no noises, leaks, or other symptoms. Also, when coming to a stop, it feels the same way just before the truck completely stops. If I drift forward a little, then apply the accelerator, it does not "slip" or hunker down.
Took it to the dealer and they claim that they can't find anything wrong and may just be the suspension releasing? The truck does this whether loaded or not?
2001 F250 CC Lariat SB 7.3
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Today I was driving about 35 mph when I drove over a small patch of rough pavement and I started feeling and hearing a rumbling sound from the right side of my truck.
It felt like I was driving on a dirt road so thinking it may be my flex plate I put the truck in neutral and the rpms went to idle and the rumbling stayed consistent with the tire rotation. When I get to about 5mph it just clears up and drives fine until I hit another bump.
Is this my wheel bearing?
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This truck has done it since I got (6 months ago). When I take off from a stop that is a clunk. It a bit like towing a trailer with surge brakes. Do they all do it? 2000 Extend cab 4X4 auto 235K miles.
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I have a 2000 F250 superduty crew cab short box. It has any occasional issue of either just shutting down (engine dies) which seems to happen if i hit an occasional bump. The other issue has happened a couple of times which is it will lose power and just go to a rough idle. I shut it off and restart it and it will run fine. I'm wondering if it is the throttle position sensor.
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I have a 2000 F250 super cab and the doors rattle going over bumps. I've seen the weather stripping mod and intend to do this but my drivers side doors are touching at the top. Would this indicate that the busings are shot? With the doors open, when I lift on the outer edge there is no movement in the hinge area. The drives door and drivers side back door actually touch and rub at the top. Any pointers?
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What would cause me to lose accelerator pedal function after hitting a bump? The engine remains on, the CEL comes on and after a few seconds or shifting into neutral and back into drive I regain the accelerator again and the CEL goes out
The truck shows no codes. It is if some connection makes/breaks intermittently when I hit a rough pavement. Also, she sometimes won't shift in reverse. Could it be related?
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2003 Jetta 1.8t 83,000 miles
Mods - Coilovers and Spacers thats it
Issue - Once I hit about 40 mph I get a thump type of vibration. I originally thought it was bad tire balance, but tire balance usually become more noticeable around 60-65. My issue is mainly present at 40 - 55 and especially noticeable on deceleration. My thoughts are maybe a wheel bearing but most likely a axle on the way out. I heard it is common to blow axles on lowered MK4s. To explain the feeling better once you hit 40 mph there is a vibration that seems like a thumping or like that it matches with the rotation of the tire. The vibration is very noticeable between 40 - 55 then it fades but is still there, but to a lesser extent.
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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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I have a few codes I pulled with and AE Using CCT and I got codes PO263, P0269, PO275..
Also got P0603, P1316, P0470 on power train
Did a BUZZ TEST P0273 and also check uvc harness
I've replaced ICP,OIL and Filter,fuel filter,CPS still no luck.
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As I said when I take off from a dead stop I can feel a clunk or a bump that feels like it is coming from the rear wheels. I can feel it more than I can hear it, although I can hear it a little. It is difficult to describe this. It is only for a second and kinda feels like the rear wheels have no traction then it bumps and takes off. If I ease into the accelerator I can avoid it, but I don't have to hit it real hard at all to get it to do it. I am sure it is not u-joints as I put a brand new drive shaft from driveshaft specialist on in the spring.
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So lately I have noticed that my 99 F-250 has a bit of a "bump" while accelerating. Think of it as accelerating with a trailer and something is loose on the hitch, making a sort of bump or thump. I talked to the guy at the parts store and he said to put it in neutral and wiggle the driveshaft up and down, side to side.
When I did that it moved up and down, but not side to side, but I'm not sure if that's because it's just positioned that way or what. The wobble was coming from the slip yoke back by the rear diff. Is this something I should be concerned about? Also, I have an ext. cab and short box, 1 piece driveshaft.
Here's a video (a very crappy video at that), not sure if it gets enough info through or not but hopefully you kinda get how much play is in there.
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My F-250 super duty has a bump thump when I stop if I release the the brake it goes thump bump? Does not do this if I put it neutral. Seems to do this in Acceleration from a stop, shifting goes bump sometimes, When hitting rough roads does not seem there bump thump suspension issues?? Already greased the drive spline joint the same, checked if there is anything loose nope, checked spare tire secure , 75,000 miles stock shocks?? something in the transfer case?? The rear end just had the seals replaced??? Tranny is secure??
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I have a 01 f250 7.3. Every once and a while when I go to start my truck it make a strange noise, very similar to the sound a vehicle makes when you try and start it while it's running. if I let off the key and try again it will start. Sometime it will do it 2-3 times. So far I have never had it not start after a few tries. Can't seem to put a reason behind when and why it does it. Sometimes it will go weeks without happening, sometimes it will happen twice in a day. Starter is year old but put a cheap one in it. Is it my starter or something else.
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Just purchased a 2000 V10 Limited with 117000 miles on it. Absolutely love it....just have a noise that is bugging the crap out of me. My husband doesn't think it is a big deal, but I would love to find out what it is without dropping 60 bucks at the dealer.
Whenever I turn a corner that is a tad bumpy it makes a bump type sound. It usually happens only when one side is going over the bump. It is pretty loud. IT will happen also when I am going down my dirt road without turning but when one tire goes over a bump the truck kind of shifts from side to side and the sound starts.
We have thought it could be the shocks or maybe the springs making that kind of sound. My husband is clueless and he knows alot about vehicles. I just hope my description wasn't too vague.
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I went on deployment and handed the wife to crank the truck up she did but didn't drive it so batteries didn't charge back up. I got them charged up and the truck cranked right up. I was plugging it in at night and it would start just fine the next morning. Then a week later batteries kept dying in a few hours during the day. Had to jump it again. then even when plugged in trying to crank it there was a buzzing noise and it would crank but not start. I bought new batteries and it cranked right up and drove fine until I shut it off and same problem and batteries were low again and it will crank but wont turn over. I am thinking maybe alternator.
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ive noticed my boost has been going down lately. At first I thought it was a boost leak so I replaced all the intercooler boots and both sides of the intercooler pipes. That diddnt change anything at all. I recently got new injectors (200/30%) and a hydra tune for them and it was quick the first few days i was running with that setup, my boost has been dropping and currently at WOT I can't even get to 10lbs of boost and it is noticeable driving, it's slower than it was stock. There was no play in the shaft of my turbo and the turbo in there is only 2 years old. Could the turbo be bad already? Or is there anything else I can check before buying a new one. I have an upgraded hpop and the 6637 intake.
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I have a 2014 F250 with the 3.55 rear end and 6500 miles and since new it has a hesitation from a dead stop that I cannot determine if it is normal or not. I took it into a dealer that specializes in diesels and they drove it and told me it is normal. Every time I see someone with the 6.7 I ask them if they have the same problem and I get all kinds of explanations from turbo lag to protecting the tranny. The hesitation I feel is when I throttle from a dead stop. It is a very slight hesitation, but very noticeable, almost like a little "dead spot." If I take my foot off the brake and let it take off on its own for just a second or two and then throttle smoothly it is not there at all. If this is not normal, I want to do everything I can to get it fixed. It is driving me nuts.
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