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Comments
1. Does the noise start only when you reach certain speed, meaning that it is caused by air stream getting inside the vehicle
2. Does the noise disappear when you turn off the fan and A/C. Sometimes blower motor can cause annoying squealing or other noise.
I had a persistent buzzing noise in my 95 Nissan truck and it only started when I hit about 40 MPH. It got progressively worse and became unbearable. Turns out it was caused by peeling mylar film on the plastic upper winshield moulding. The film was peeling and fluttered in the wind. It sounded like the noise was coming in from under the dash though. Took me a while to find the source.
Other than that, there are of course many other things which could be making such a noise. You may want to try driving around with someone else in the car and have them hold onto, push, pull, or otherwise test things that could be loose and making noise (seats, door panels, dash compartments, etc.) while listening for the squeaking to stop. Good luck if it's under the dash, because it's no fun contorting yourself enough to get at anything under there easily.
Here are some things that have made noise on the inside of my 626 thus far:
- Driver's side seat was squeaking intermittently from underneath, moving the seat would silence it but only for a couple days. Lubricating the seat rails solved it permanently.
- Driver's side seat belt buckle squeaks intermittently in warm weather near where it's bolted on (only when the seat belt is in use). Haven't tried any solutions yet.
- Dash compartment below the stereo clicks persistently until I flip the door open and shut it again, after which it stays quiet for about 3 months or so (I don't really use it much). This one isn't annoying enough to bother fixing.
Car manufacturers frequently use pieces of felt between plastic panels to prevent squeaks. Sometimes these felt pieces slip out. This can cause very annoying squeaks and rattles. There are pieces of felt between the dash upper cover and winshield post covers, for example.
Since I bought the car (73,000 miles), I have changed the plugs, air filter, and the oil a couple times. No "check engine" lights are displayed during the rough, chugging acceleration.
Does anyone know what might be contributing to this problem. Your suggestions are appreciated.
Was the timing belt recently changed? If not installed properly, it could cause performance problems. There are also issues with distributors in some 626 models(I believe that 98 is the last model with a distributor.)
I talked with a rep from a parts supplier and he suggested I try spraying some water on the plug wires while the car is running to see if it causes any engine hiccups. He said that doing so was an "old test" on wires that sometimes works to identify wire leakage. I tried that [on both the wires and coil pack (no distributor on the 98)] and nothing happened. Engine kept firing smooth.
Today, I'm going to try new wires and I'll let you know the outcome. I'll also check the Denso plugs that I installed a couple months ago for carbon tracking.
I checked the plugs for carbon and noticed some buildup around the first couple of threads on each plug, but the electrodes looked clean. Kept the plugs and, a few miles later, dumped a bottle of Valvoline SynPower Complete Fuel System Treatment. Maybe a little overkill on the cleaner, but I guess it won't hurt. Now, lets see how she runs for awhile.
Time: 6:00PM to 7:00PM PST -- 9:00PM to 10:00PM EST
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fowler3
My current tires are Michelin Energy MXV4 Plus tires (205/60/15). In addition to considering Michelin as a replacement, I am considering lower priced alternatives such as the Yokohama Avid H4 and the Kumho HP4 716 (roughly $65/tire cheaper than Michelins). The Michelin and Kumho models are considered in the same tire class - Grand Touring All-Season, while the Yoko is in the High Performance All-Season class. My thinking initially is biased toward the Yoko due to its likely handling advantages.
If anyone has a strong opinion or experience (good or bad) for tires on their 626, please share that opinion. Might help clutter my choices some more.
Yokohama, Dunlop, and Bridgestone are the best names for quality good performing tires. Kumho is an excellent value and should prove to be just as good as the others at an even cheaper price.
I bought these at Sears since they matched the Tirerack's price :-)...
I have never had any blowouts, out of round problems, or broken belts with any of the Michelin tires. Maybe they are not the best, but my experience with them has been positive compared to some other brands. You may want to read some Nissan Maxima posts about terrible quality Bridgestone Potenza tires installed as original equipment on 02 and 03 Maximas. Nissan switched to other brands for 04 Maxima models because they had to replace many OEM Bridgstone tires due to numerous defects, especially vibration problems. And these were V rated 17 inch tires in many cases.
And I had to have one OEM Bridgestone Potenza tires replaced on my Mazda 626 under warranty because it caused persistent pull to the right (alignment being set to correct spec). the problem disappeared when the tire was replaced. So much for Bridgestone tire quality.
As far as Bridgestone is concerned, I have heard of some problems with certain Potenza models (usually the OEM versions; RE 92 to be specific). But the higher line versions are much better and highly rated by both owners and magazines. I personally have had excellent luck with Yokohama and Dunlop and other family members have liked Bridgestones way more then Michelin.
Thanks
Walter
about.Luv the left-leg flexor. $16k 4 years ago
was/still the best deal for our first NEW car.
The four-banger makes all sorts of noises, but none of which I'd characterize as a speed-sensitive whine.
BTW I just found that I consistently get 10% better fuel economy with HESS gasoline. I use midgrade in my 99 ES V6. My mileage now is about 25MPG combined, compared to about 22.5 to 23 previously with other midgrade brands. Anybody experienced anything like this with HESS fuel?
My 99 626 ES V6 has a manual transmission which has been bullet proof so far (77k miles). I had some problems with the car during the warranty period - namely bad CV joints and defective front hub. Also leaking coolant overflow tank, which caused A/C to quit working intermittenly. The only problem I had after warranty expiration so far was a failed trunk release switch. BTW I still have not changed the timing belt although they recommend it at 60K miles. It is the same belt that they use on cars sold in states with a 105K replacement interval.
Regarding the timing belt: if the recommended interval is 105k, Mazda does indeed suggest inspection at 60k. On the other hand, if you're going to go to the trouble of pulling the cover to look at the belt, you might as well replace it and be done with it; you've already paid most of the labor charge.
My 2000 LX has had no unscheduled repairs except for replacing a wiper blade following an incident with a vandal and fixing a small break in the windshield (high-speed pebble in the Carolinas). It is of course out of warranty now.
I believe that the same applies to the 4 cylinder model.
I am inclined to split the difference and change the belt at 82,500 miles.
Has anybody replaced this switch before? Do you have to remove the door panel to get to it? Once I get the switch out, I will jumper the leads and see if the trunk pops open, If yes, the switch is definitely defective.
Would you replace the camshaft and front crankshaft seals , as well as the water pump and the tensioner with the first timing belt change at say, 82,500 miles as you suggested? Does Mazda require valve clearance adjustment on the 99 model at 60k miles? Removing the valve covers on the V6 is not an easy job and I read somewhere that you need special tools to adjust the valves or you must remove all four cams.
Are the valves on a 99 v6 even adjustable? I'm not sure myself. definitely replace the seals and water pump while the belts off.
also replace the drive belts for p/s and a/c.
Concerning the valves, 98 and up models have solid valve lifters, not hydraulic type. Did not know this myself, until somebody pointed this out recently.
BTW, I already replaced the driving belts at 65K miles. Does anybody know what is the life expectancy of the 626 V6 engine that is carefully maintained? Is this a good engine?
A well-maintained 2.5 should be good for an easy 180-200k or more; it's very lightly stressed (even with the short gearing and concomitant high RPMs) and barely works up a sweat.
Mazda recommends 48k between valve-clearance inspections, though I have yet to hear from anyone who says he needed an adjustment that early. The tricky part (and where the Special Service Tool comes into play) is overcoming the spring to see just how big a shim one needs to meet clearance specs. I can't speak to this directly, but I do know that my solid-lifter '75 Toyota Celica needed exactly one valve adjustment in 195k miles; somehow I don't think this is going to be a big issue.
It was the alternator bearings.
Replaced the alternator (no cost)and belt and all noise has gone.
Hope that is it!
how do 'say' the year of your zoom/zoom. Does yours
have a clutch...we luv our left-leg flexor. Good luck
with this fine automobile.