Just put back on road for winter,replaced battery&all new brake pads&rotors.wont pass inspection, computer states emissions not ready,now shaking&slight shudder when accelerating between 40 to 60mph,stops when you take your foot off gas,checked universals and most basic checks,fluids etc.now checking vacum system for leaks. also checked all fuses ,look okay. please help with any suggestions of what to check now. used my obd2 scanner & no codes came up. thanks tim
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Inspect the wheel hubs for flaws in the rotor mounting surfaces that could prevent rotors from seating properly. Also, check the wheel bearings for slop, roughness or other signs of wear. If the bearing does not rotate smoothly and keep the rotor on center, the rotor will wear unevenly. (Also, pay attention to unusual rumbling sounds when cornering or sudden jerks while braking; these indicate possible wheel bearing problems. The jerking may be caused by the bearing locking up momentarily when the brake changes it load forces.)
Another thing to look at if the problem recurs: take a quick peek at the instrument panel to see if the low traction warning is on. If it is and the road conditions are good, the anti-lock braking system has a false trigger condition. This could be caused by an off-center rotor or a sensor fault. The hard part is identifying which wheel has the problem
The usual cause for this is because the brake rotors on your Stratus have warped slightly. In the old days, it was easy enough to simply change the brake pads and then have the rotors "turned" (machined) so they turn true. Nowadays, finding a place to have your rotors machined isn't all that easy, though you may just get lucky. It's usually around $10/rotor. Replacing the rotors sometimes seems to be the only option. You'll be able to find them at Advance Auto Parts, Auto Zone, etc., and usually run around $30/each. Of course, while you have the brake calipers removed to remove the rotors, you may want to go ahead and put a new set of brake pads on there as well. You'll notice an immediate difference in braking once you get back on the road, without all that incessive shaking to a stop!
most likely it is slight imperfections in the rotors.
there may only be rusty spots in the rotors, or slight warping. best thing is to have the rotors lightly turned on the vehicle if there isn't enough miles put on the vehicle to want to replace the brakes. if the pads are okay, bring it by somewhere like firestone and they'll turn the rotors on the vehicle...
I DON'T KNOW IF THIS WILL HELP BUT NARROW IT DOWN,WHEN BRAKING WHAT SHAKES,STEERING WHEEL SHAKES BACK AND FORTH IT WOULD BE A FRONT BRAKE ISSUE,MAKE SURE CALIPER HARDWARE IS OK,AND CALIPER SLIDE PINS ARE FREED UP,IF THE WHOLE CAR SHAKES IT'S THE REAR BRAKES,PINS SLIDER AND HARDWARE ON REAR ALSO,HOPE THIS HELPS
Sounds like you have bad brake pads or rotors ..if you are not mechanical take them in somewhere ......if the brake pads are left too long the metal will wear away the rotors and then it all needs to be replaced....hopefully just the pads need replacing but it sounds like if it is shaking that bad rotors are gone too. usually the pads will make a sqeaking sound when the get to worn so you know that they need replacing.
The shaking would be from your front rotors. First, loosen the lugs and retighten them with a torque wrench (not an impact gun) to the proper setting as described by Toyota. If the lugs are tightened unevenly or too tightly, it will artifically warp your rotors. If this does not fix the issue, your rotors are most likely warped from overheating, or being sprayed with water while hot, or from age. Get new rotors (and pads - always use new pads with new rotors), install them, and torque your wheels properly, and you should be in good shape.