Certain models may have a vibration issue at highway speeds that could be due to uneven tire pressures, tire rim out of specs, wheels out of balance, AC compressor bracket bolts not torqued correctly, misalignment of the steering shaft coupler, improper ride height, or wheel alignment out of adjustment. A qualified technician is needed to sort out these problems and correct them.Google+
Car Problem Reports
Honda Passport Vibration at Highway Speed Due to Various Issues
Honda Passport Problem
Average Mileage: 119,800 mi (80,000 mi - 207,000 mi)
Visitor, 1998 Honda Passport, 80,000 mi
I had big vibrations with noise and had to pull up to the side of the road and did check ups and nothing could be found. It happened randomly for at least over seven years but never could duplicate it. Never could figure out why and even repair shops could not figure out. They said nothing was loose and they must be able to recreate vibration and noise to solve but since the problem happened randomly, it could not be recreated when wanted.
Finally, one time it made vibrations again (usually at above 60 mph) and I stopped the car and pulled over and opened the engine hood. I was looking for something loose. It suddenly dawned on me that nothing was loose except for the handle of the car battery (a strap that is attached to the car battery and you lift and carry the car battery by that strap). The battery strap which is a plastic and rubbery that you take the battery out by or you carry or lift the battery by. I thought that maybe due to high speed ( from 60 mph or above) somehow the battery strap lifts up somehow and it touches the hood of the car whereby creating vibrations and sound. This strap rubbing against the hood of the car creating the vibrations and the noise. Usually, you do hear like the noise is coming from passenger side of the engine. I wanted to cut the strap right then but it would be difficult to carry the battery when battery goes bad. Therefore, I thought of keeping it and I tightened the battery along with the strap so that the strap of the battery was not loose anymore. Since tightening the battery strap along with the battery, I have not had the vibrations although it is bit early to definitely say it is the solution for this type of problem. It has been only a month since I tightened the strap but I did not have the problem yet. I am pretty confident it must have been the strap as it happened randomly and technicians could not figure it out. No harm in trying if you have the same type of problem. It costs nothing and the strap is the only loose part the under the hood. As I said, although it is too early to say confidently that this is the solution, this may be it if there are no other problems with the car. If everything seems ok and the car drove fine after such vibrations and it happened randomly and no one seems to figure out why, then may be this is it. Maybe somehow with this suv and at these speeds, somehow the battery strap lifts up against the hood making the noise and vibrations. Since then I have not had the problem of this type of vibrations although I do agree it is too early to tell.
2001 honda passport...I hate the viberation on freeway cause I feel like the wheels are gonna fall off...I need a tune up as well and was told to do water pump and timing belt manufacturers reccomendation at 100,000 miles?? I also have replaced ERG valve and the fuel sensor is bad and for all that work Im told about $1900
I had reported earlier that the battery strap was the cause of problem for vibrations on Honda passport but it was not so. I could not delete that report now and therefore, writing a new one. I was wrong about that solution. Although it worked for quite some time, making me think that it was a solution, the vibration did come one time making me realize that the solution I thought was correct was NOT really correct.
I went in for new tires to the local NTB, replacing my Michelin’s I had had for just fewer than 100K miles. Bought a set of Goodyear’s, as I couldn’t see spending the dough on another set of Michelin’s since this Honda/Isuzu had so many miles on it, it might not last a week. I went from a nice comfy ride to a vibrating mess. I took it back in to the NTB over the course on the next two months for the vibration several times. Each time a check of the tires resulted in a little out of balance but not anything that would generate this kind of vibration. On the last trip back we (I) decided that I got a bad set of tires and required them to be replaced. The NTB manager was agreeable wanting to keep me a satisfied customer, so he put on set of Pirelli Scorpions and I paid the difference. Unfortunately, I still had the same problem.
Wanting to eliminate anything obvious, I took the drive shaft out and had it checked for balance on my own. I have also taken it to a different NTB for a free balance and rotation just to get an unbiased opinion. Again they were a little out of balance but not to the point of causing the vibration. I decided to live with it figuring there is something wrong with the truck, and it will eventually break and I’ll know what to the problem was and what to fix. 6 months pass and nothing breaks but the vibration continues. I decided to take it to a different shop for an opinion. They can find nothing wrong, so I tell him the tire story, to which he responds… put a set of Michelin’s back on it and the problem will go away. And he works for a Firestone, which we know, doesn’t sell Michelin. He said he’s fought several of these Passport’s and Rodeo’s. The Passport is so light that the newer SUV tires are heavier than what it was made for. He tells me Michelin have a thinner sidewall and this absorbs the vibration.
It’s now time to go back to NTB after 8 months and see about getting another set of tires.