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Pickups Ford F-Series Ford F-Series Rough Idle/Vibration Problems
136 messages, Last post on Nov 06, 2009 at 7:23 AM
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Replying to: ktownfootball6 (Jul 16, 2007 9:42 am) W.r.t. the vibration, once the exhaust manifold separates, the O2 sensor will read high O2 in the exhaust stream (is the check engine light on) and the computer will adjust your truck to run richer. This will affect the way your truck runs. I have been having problems with misfiring on my 1997 F150 and I believe that because of what I described above, the richer fuel mixer causes the engine to run hotter leading to other problems with plugs, spark plug wires, and/or coils (the coil over plugs have a wire inside the boot, that is the spark plug wire). Take it to Auto Zone and they will diagnose with their reader for free. |
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Replying to: chip5150 (Nov 27, 2007 2:16 pm) Since you have this vibration at idle and driving, I would not suspect anything in the suspension, tires out of round, shocks, ect. Before I give a recomendations as to what to check for. Explain when this vibration first started, it may be related to a brand of spark plug that was installed on your tune up. Food for thought, Fords do not like champion spark plugs. To test your motor mounts, one meathod is to have an assistant put the vehicle in drive with the brake on hard and give the engine throttle without killing it. You should view the engine twist or flex sideways no more than 2 inches. One inch is about normal.
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Replying to: mickeymouse2 (Feb 03, 2008 10:02 am) |
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| I have a 1999 F-150 with a V6 4.2 and it is throwing whiteish smoke from the tailpipe and it has a somewhat rough idle. I checked the compression and the vaccum and they are fine. I pressure checked the cooling system for a possible blown head gasket and no leaks. I checked for codes and there aren't any and the fuel trim and oxygen sensors seem to be working properly. There are no misfires detected by the PCM and the fuel inector pulsewidth seems fine. The next thing that I could think of is a bad PCM. I don't condemn it just yet since they are very expensive so I was wondering if anybody out there can give me a tips or a heads on this problem. I'd appreciate it a lot. | |
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Replying to: sgood (Mar 24, 2006 9:05 pm) All of the vibration issues on these engines seems to mimic suspension or tires, but its not. peterandrulis  dejazzd.com
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I have a 2005 F150 5.4 triton V8 w/ 46800 mi. My cousin has a 2006 5.4 F150 with 51,000 miles, My business rep has a 2007 5.4 super crew with 54,000 miles. all 3 and more I have easily tested have the same engine shake vibration at 1300 to 1800 rpm when revving in park or neutral. The vibration is very obvious and specific in all vehicles. it is harder to detect when driving but feels like a tire out of balance at any speed when 1300 to mainly 1800 rpms is on the tach. In 0verdrive at 70mph,1800 rpm . Off overdrive at 50mph prox , same rpm etc. Different gears will easily feel the shaking and the wipers will shake at that rpm range!!  This is a progressive problem that has now been examined by 2 dealers in Central California. Just today, my dealer Service manager agreed that this is egregious and very obviously an unusual engine vibration at those rpms. He discussed this with a Ford engineer with a new 5.4 and though not as bad, the problem is noticeable. At 50,000 miles it is VERY noticeable when the engine is cold!!!!! When warm it is still obvious!! I am asking anyone to check their 2005 to 2007, 5.4 triton engines by revving up the motor to tach read 1300 to 1800 rpms and , especially cold, feel the engine vibration shaking. I think it is a 3 valve cam problem. We need more input to push Ford to qualify and resolve this huge problem!! |
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my '04 F150 with 38,000 miles is experiencing the third set of warpped rotors. the first two were replaced under warranty and now I'm out of waranty so they say I'm out of luck. I rarely tow a 1,200 lbs trailer and drive the truck with ease to save on gas - i've also had the truck regularly maintained, yet I'm now looking at another brake job. It's one thing to have to pay this out of pocket, but anyone who wants to buy my truck, if they look at my service records, are going to wonder what the hell is wrong with my truck.  This along with a complete transmission failure 6 days and 26,000 miles past the factory warranty. When I'm done with this truck - I'm done with Ford. Ford dealerships these days are so desperate for income they don't think about a long term relationship with the owner - it's all about getting money now to stay afloat.
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Replying to: aspesisteve (Jul 31, 2008 10:58 am) The problem is un even and excessive torque due to the weight of the vehicle, and cheep rotors. Torque is effected by the weight of the vehicle. Do not over torque. Good luck.
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Replying to: mickeymouse2 (Jul 31, 2008 4:13 pm) is it safe to assume that Ford used OEM or NAPA rotors when replacing my worn out warped ones? When I have the current one's replaced, I'm going to ask for the old parts to see what was put on. If it's some cheap Chinese part they put on then I'm going give someone at Ford a piece of my mind. 
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