I have a 97 f150 4.6, when I'm towing a load and trying to accelerate a little harder either to just gain speed or climb an incline I get this terrible crackling noise from my engine as if I was low on coolant or low on oil. But all my fluids are good. It even does it when I'm climbing an incline not loaded. What this could be?
View 2 Replies2001-F150 5.4 Eng. bucking/stumble. I think my problem is slightly different than what I am reading about. Here is what I get (125k miles):
* Engine only bucks/stumbles intermittently and not at idle or at harder acceleration (this bucking is really harsh and makes the truck feel like a learner trying to drive a manual transmission and it is jumping down the street). The engine stumble is not a regular timing such as a cylinder going out and staying out for a period of time. It is quite a random pattern to the jumping
* Originally thought it was humidity related, but now I realize it happens in any climate
* No stumble in neutral at any rpm... only at a stop if I put it in a power brake load.
* When the stumble shows up, it seems like the throttle is around 10-25% (my best guess)
* Sometimes goes days without issue, but sometimes every ride and virtually every acceleration.
* Normally no stumbling at highway speeds, unless going up a hill.
* Every time it stumbles, it can be eliminated by either backing off on the accelerator some, or hitting the accelerator harder.
* No engine codes or CEL has ever come on
* Fuel mileage appears to be the same before and after the trouble started
Here is what I have done to try to correct it:
-> Fuel related (bad gas)... tried to run the tank as close to empty and fill it with fuel from different stations... when this didn't work, I have added HEET to it to dry up any water in tank.
-> Fuel delivery... replaced the fuel filter... seemed to work for one day, but then the gremlins came back.
-> Fuel delivery... ran multiple injector cleaners through tanks of gas.
-> Intake... replaced the filter.
-> Electrical... I don't believe this is related, but my battery died... parts store tested the system and stated the alternator was bad... replaced it, and took the old one to the parts store for bench testing and it was 100% OK... even thought the old showed OK, I left in the new one as a precaution. Only other item was a set of plug changes around 30k miles ago... I think I put in the super duper Bosch plugs with a lifetime warranty.
Current thinking and items I don't understand:
A) The bucking is so severe, it appears to be a random harsh loss of either fuel or ignition. A component that has failed electrically should give me a fault code with this level of severity. No trouble codes or indicators to electrically sense this disturbance...
B) For the fuel path, the most likely item is bad gas and I emptied my tank by running it as close to empty as possible and then used different gas and HEET to eliminate water. THIS MIGHT STILL BE THE CAUSE???
C) Another one for the fuel path is an intermittent fuel pump electrical connection or a weak pump from a pressure point. But if this is the cause, then why does it dissappear upon harder acceleration?
D) One last fuel thought is injectors... perhaps one or more have a range of delivery that they don't work properly... but this doesn't make much sense as at idle and harder accels are fine
E) From an ignition standpoint, perhaps I have failing COP's. I have not just gone out an replaced them due to my limited budget and the difficulty I read about changing them. Again, if one of these is failing in an either open or short condition, the computer should set a code for a misfire for the related cylinders. I get nothing. Hence my hesitation in making this change so far.
One thing i don't understand from the various posts is that the cops can fail under loading. what makes this happen as electrically, i don't think they can detect a load or not? it is hard for me to also understand why my truck would allow me to back off on the throttle or hit it harder and the issue disappears.
I took my 1998 Infiniti I30 to my mechanic for routine maintenance, and I noticed the engine was working a tiny bit harder to startup and to accelerate on highway in the last 2 weeks. They discovered the air filter and housing were completely burnt out! We're scratching our heads. Internet search and check with other mechanics- no clues. It's been a dream for years with routine maintenance, has only 125k, last service May 2013 since I only drove it 5K since then. I'm the only driver and it sleeps in my garage (secure, no rodents). What the heck?
View 11 RepliesI have been having some major issues with my truck!
The whole truck is vibrating when on. When I accelerate I hear a loud noise like something is hitting a fan. I'm scared to even drive it. The rpm's have been jumping around.
What could be causing this? I already replaces Fuel filters.
Just passed 30 months and 30k miles in my 2012 TDI SEL and suddenly the air conditioning fans blow harder as I press on the accelerator pedal.
To be more clear, as I accelerate, I can hear the windshield/defogger fans blow harder. When I let up on the accelerator the fan noise dies down. I tried adjusting the A/C settings to blow to the middle or feet only, and also enabling/disabling cabin air circulation. It only seems to be the defogger fans that do this.
I have a 2003 Camry 2.4 LE with 120k miles on it. It's been very well taken care of. As of now, here is the maintenance that has been completed at my dealership. By the way, I don't trust dealerships, but I do have one nearby that is actually beyond outstanding (and I know a little about cars):
- Regular oil changes, and always with 5W-30
- Radiator flush and thermostat replacement
- Tranny flush
- New front brakes, rear brakes cleaned, and lines flushed.
- Oil pan gasket replaced
- Valve cover gasket replaced
- Spark plugs replaced (at around 105k)
So, with this information being provided, here is my current problem. Lately, as I accelerate between 1500-2500 rpms, the engine has a louder than usual (but not too loud) groaning noise. Basically, the engine just sounds a tad louder than normal along with groaning noise. The engine also feels as though it is running kind of "dry" (if that makes any sense).
Now, above 2500 rpms, it's just fine. It's amazing on the highway, but I feel as though it has slightly lost acceleration in the city. The only issue with the car is the infamous greyish/blue smoke at startup, but that rarely happens and when it does, its a small amount of smoke, and it has never affected it's performance or gas mileage. Another thing is that I had to have that dreaded oil splash guard removed, because apparently the timing chain punctured it and it was about to fall off.
This problem has been recent within the last month. Just before this, the car has been on a roundtrip to Tucson from Tulsa, and Amarillo twice, complete with 32+mpg on the highway! So, what's wrong? Serptentine belt? PCV valve? Cam or something underneath the valve cover?
My 2005 Jetta gli 220k miles just spurred going down the road now every time I accelerate and get into high Rpms the Ac vents start to blow harder and feels like loss of power. It's fines at idle and first gear but 2nd and up its does it I'm stumped....
View 2 RepliesMy speedometer has not been working for months now and it really hasn't bothered me as I go by RPMs, but I am going to make a long trip in a few weeks and I wanted to try to get this fixed.
The speedometer flips over to 100 mph and rest on the opposite side as it should. When I accelerate it does not move until I get over about 35 mph where it will then flip to 86 mph. It will slowly move to 82 mph as I accelerate up until 75, where it will then no longer change. Every once in a while it will start working when I start the truck up, or when I am driving down the road. It has before, within a 30 minute time frame, started working and stopped working 6 times. Currently my ABS light is on, but it has been on long before this started occurring. Every other gauge on my dash works.
I drive a 5 speed manual V6 2003 Ford F150.
I have a 1998 f150 w/ the 4.6L V8
For months I have had a hesitation in this truck when i go to accelerate, and at times you can even feel a little buck with the cruise set at 70MPH. It has gotten worse and worse. When i start pulling a trailer good luck, it will do it but its terrible, hesitations and misfiring,
There is always a misfire/hesitation. Will Idle nice After its warmed up. Sat for 2 weeks fired it up and it had a HORRIBLE idle for at least 1-2 min. This is new now it wont idle when cold. Now I had one code Cylinder 4 misfire, cleared the code never came back 2-3k miles later still not back on -
replaced coil packs
New plugs
New wires
Fuel pressure test good
Checked the Heater hose - not leaking and nothing in the hole.
I have a 2000 f150 xlt 4x4 with a 6" suspension lift. Recently Ive had some front end noise, so after swapping out a lower ball joint and the sway bar links, i still have the pop. It only happens when at a stop or slowly moving and i turn to the right and accelerate. It sounds like its coming from the front drivers side. I have wiggled everything in the front end and everything is very tight. The only loose things i can find are:
1) Bottoms of shocks can be wiggled back and forth, both sides do this.
2) driveshaft leading to the front end has a lot of play, but I don't believe that's relevant since its not used when I am in 2wd.
99 F150, 4x4, 5.4L, 4R70W trans.
I am experiencing a shudder at speeds between 45 and 50 when trying to accelerate mildly - it usually occurs after slowing down from a higher speed.
It is similar to the bucking that occurs when you do not downshift a manual trans.
I am guessing that it is the torque convert clutch staying locked or the tranny staying in OD too long. The shudder will go away if I give the truck enough throttle to downshift or simply push the overdrive off button - which forces it to downshift to drive.
What is the probable cause?
When I accelerate i get a loud squeal until my truck changes a few gears. Its only when I accelerate and only if my trucks warm and has been running or a few minutes. Cold start it wont happen right away. What it is or could be. Changed my serpentine belt that didn't work...
View 7 RepliesSo my truck started to intermittently misfire about a month ago . I changed the spark plugs wires at first and it seemed to get better but it still had a misfire . I replaced the spark plugs and ignition coils and the misfire is still there . Up until the other day it was a noticeable issue but still drivable with . On my way home from work it got alot worse and started to misfire any time I tried to accelerate and now is noticeable at idle now as well.
I checked the fuel injectors resistance and they are about 14.8 ohms . I am not getting any codes for a misfire . I tried to pull the fuel injector connectors to try to find the source of the misfire but could noticeable change in engine rpm. Where to go from here and what I should check first? Would a clogged fuel filter cause something like this ?
I own a 2000 f150, 7700 with 199,000 miles, 5.4 eng. In drive with foot on brake, it idles at 600 rps, fairly smooth. When I accelerate from a stop the engine shudders. Ten months ago I had the plugs replaced, last week I bought 8 new coils and I installed them, no change. I removed the down stream o2 sensor from the exhaust, it was as clean as blued gun metal. Can these 2 sensors be cleaned or tested? The service engine lite is not on. List of things to check?
View 12 RepliesI have a 97 ranger 4 cyl that's been making a whistle noise the last few weeks. The sound is literally like a whistle and the noise level varies but its never obnoxious or loud. The sound does not happen when truck is idle, seems to happen mostly when I first accelerate and slow down although sometimes it does happen when I am going 20-30. it doesn't happen all the time but lately its happening more. What this could be? The truck idles and runs great.
View 14 RepliesFord F150 1999 5.4 XLT... I've had this truck since may 2013 from the 2nd owner who only drove it
occasionally to make sure it ran. For the last 5 weeks there have been two occasions where my service engine light appeared...once on 12/28/15 and again today. Both read cylinder 4 misfire. Upon searching this piece which I'm assuming is the boot that covers or houses the spark plug is very unsecure and causes a shaking feeling as I accelerate or idle. Being so far back I can't reach it with extensions on a ratchet and barely fit my hand back there. Having to consider taking it into a shop for further analysis and repair but I'm trying to save as much money as possible as I am in between jobs since mid January. I have a picture attached...
I have a 2001, 2wd, XLT, Super Crew with 4.6L and 180000Kms. I am the 2nd owner and have owned it for roughly 6 years. Since owning it I have towed the following: a 1500 Boat, 1000lb full utility trailer, a 2700lb boat, and most recently (Last summer) a 3500lb dry weight/4000lb full 22 foot camper trailer. None of these items ever caused me any problems til mis summer with the camper.
I have always got check engine lights for the stupid coil packs. It seems like I would replace one and a different one would go. I was camping one weekend a short hour distance from my home when I pulled onto the main highway and began to accelerate up to highway speed but it was feeling sluggish picking up to 100kph. When I merged onto the highway it was not a flat piece of ground and was a small grade of a hill, but nothing big. Before getting to the top I started to hear a strange noise, almost like a rattling, and the check engine light started to flash. After breaching the hill, it picked up speed, the light went out, and everything seemed fine.
This happened twice last summer with no other problems. At the end of the summer I once again had a check engine come on...I had blown out a plug, had it fixed and replaced 2 more COPs but still had codes showing for CC, M, F, O, OH, C, E and EV. My reader also said Freeze Frame, and MIL on. I had the truck in in Nov/Dec for an emissions test and it was given a conditional pass due to codes reading but no Check Engine light at this time.
I want to keep this truck...I will be towing the camper again, buit I'm considering getting a different truck. As it is I know I already have to have air bags installed in the rear to level out the load when towing. Hopefully that will cut back on some of the acceleration drag. At present time I have a check engine on...I'll check it again and post what its reading but most likely the same stuff.
I am first time ford owner of a 2003 ford f150 super crew fx4 with the 5.4 Triton and lately when I accelerate hard and it down shifts. It shifts excessively hard or when your going slow and the have to accelerate it also shifts really hard i dont know if it is the diff the U-joints or if its the transmission.
View 4 RepliesI have a 2001 5.4 V8 with 55K miles and the tow package. On acceleration the engine makes a ticking noise. Engine seems to run fine, no misfire.
View 14 RepliesI recently bought a 2000 f150 4.6 with 105000 on it I notice when I was driving if the engine got under a load it whined. It does it every time and it does it being parked but not as bad. What it could be?
View 2 RepliesI drive a 2002 F-150 (4.2L) with 150K miles. A noise similar to the belts slipping started up the other day but stopped when I drove the truck for a short distance. So I thought slipping belts was the problem but the noise started up again even after driving several miles. The noise only comes on intermittently and not all the time. In fact, it never comes on when a mechanic is looking at it so they think I am hearing things.
I had the belt changed out and the mechanic said he thought the water pump was going out. So I had that changed out. He had the alternator checked out and it was good. The truck runs fine but the noise still comes and goes. It sounds like a high pitch vibration or like something is rubbing against something else but only periodically. What it could be?